Exploration Report JORC Standard
Exploration Report JORC Standard
Exploration Report JORC Standard
EXPLORATION METHOD
ACCORDING TO JORC STANDARD
DECEMBER 2013
Preface
This report is prepared in accordance with the data collected from exploration
result within the area of Mining Business Permit (IUP) Exploration of PT Aurum
Persada Khatulistiwa (APK) with total of 1000 Ha. The exploration is aimed to
obtain data regarding gold, zircon, and titan minerals. The period of data
previously explored. The exploration reveals that 47.6 Ha of such area can be
The expert force team of PT Bhineka Citra Tomosindo involved from data
Yunasri
Thamryn Simanjuntak
Rano Vera
signatory of this report also supervises, evaluates, and is fully responsible for the
Indonesia is gifted with beautiful, lovely, nature and rich of natural resources. From
Sabang to Merauke, there are countless treasures bestowed by The Creator to this
many races nation. Sumatra with its mountains and basins is full of mineral and
energy raw materials, such as oil and coal. Java with its fertile land contains metal
mineral beneath its southern islands. Celebes with its ultra-base minerals (nickel,
chromites, and iron ore). Papua with its prolific land has become one of the biggest
gold and copper mines in the world.
Borneo is one of the oldest islands in archipelago, through natural process, namely
corrosion, erosion, and sedimentation; it has provided sediment required by human
beings. Sedimentary coal and alluvial contains minerals like gold, zirconium (zircon),
and titanium (titan).
PT Aurum Persada Khatulistiwa who obtained Mining Business Permit (IUP) from
government of Regency of Sintang, has opportunity to manage Borneo’s natural
treasure to be better, more efficient, and more maximum. The method of mining
carried out by this company will catch more gold grains and other mineral grains in
the future.
Furthermore, the existence of this medium to large scaled mine, later, is expected to
increase PAD of local Regency and provide work for the people around the site.
This report is prepared in accordance with Standar Joint Ore Reserve Comitte
(JORC). The signatory of this report is the member of Australian Institute Mining and
Metalurgist (AusIMM), Number 312802.
Author
i
TABLE OF CONTENTS
Preface ........................................................................................... i
ii
2.2.3 Secondary Gold Mineral Deposit ...................... 15
iii
4.5 Gold, Zircon, and Titan Resources ................................. 38
BIBLIOGRAPHY ................................................................................. 50
iv
LIST OF APPENDICES :
v
CHAPTER I Introduction
CHAPTER I
INTRODUCTION
1.1. Background
Such decree is the underlying document of the exploration work, which is aimed
to find economically valuable minerals in the alluvial deposit. The objective of the
exploration is to determine the potential of gold, zircon and titanium deposits in
the IUP area.
In order to determine this potential in the 300 Ha area within the IUP Eksplorasi
area, PT. Aurum Persada Khatulistiwa is chosen to do a detailed
exploration. Exploration activities which have been undertaken include geological
mapping, test pit sampling, and hand auger. The depth of the taken sampling is
within 2-3 meters.
In order to know the potential of gold, zircon and titanium in the greater depth of
the alluvial deposits, PT. Aurum Persada Khatulistiwa has also performed the
geophysical work (geoelectrical survey). The capability or below-the-surface
reading ability of this method can reach 50 meter depth.
Referring to the result of the geophysical exploration method,a drilling work has
also been carried out on 10 (ten) points in which the depth is 45-55 meters. From
the drilling work result, a sampling was carried out, i.e. by dividing a half of the
drill core (core) to be analyzed. The selected laboratory is Mineral Laboratory of
PT. Intertek Teknik Services. The elements analyzed are the targeted exploration
elements, namely gold (Au), zircon (Zr) and titanium (Ti).
After the analysis was drawn, the next exploration activities are the mapping of
detailed exploration area surface topography and preparation of the report.
The prepared report will refer to Joint Ore Reserve Committee (JORC) Standard.
Then, the report drafting team appointed by PT.Aurum Persada Khatulistiwa is
PT.Bhinneka Citra Tomosindo. The top management of PT. Bhinneka Citra
Tomosindo is the Competent Statement Signatory of JORC, the Member of the
Australian Institute of Minerals and Metalurgical (AusIMM), Member Number
312308.
The purpose of the exploration activities in the IUP Eksplorasi location of PT.
Aurum Persada Khatulistiwa is to know the condition of the gold and accessory
mineral deposit in the IUP in a more detailed way. The intended condition may
include the area and width of distribution, thickness and content of the elements
deposit, which is the aim of the exploration in every ton.
The IUP Eksplorasi area of PT. Aurum Persada Khatulistiwa (width: 1,000 Ha)
administratively includes the administrative areas of 3 (three) sub-districts, namely
Tempunak Sub-district (80%), Belitang Hulu Sub-district (15%), and Sepauh Sub-
district (5%), Sintang Regency, West Kalimantan Province.
Table I-1.
Coordinates of The IUP Eksplorasi Area of
PT. Aurum Persada Khatulistiwa
No. of East Longitude North Latitude
Point (E) (N)
1 111 17 46 E 0 6 14 N
2 111 17 46 E 0 7 34 N
3 111 17 37 E 0 7 34 N
4 111 17 37 E 0 7 49 N
5 111 17 27 E 0 7 49 N
6 111 17 27 E 0 7 59 N
7 111 17 19 E 0 7 59 N
8 111 17 19 E 0 8 30 N
9 111 17 57 E 0 8 30 N
10 111 17 57 E 0 8 14 N
11 111 19 8 E 0 8 14 N
12 111 19 8 E 0 6 44 N
13 111 18 39 E 0 6 44 N
14 111 18 39 E 0 6 14 N
From Jakarta to the location of the exploration area, the following route can be
taken:
Route Mode of Transportation Time Travel
Study of literature relating to the alluvial gold potential around the IUP
area.
Geological mapping, with a focus on the sediment deposit structure
specifically gold and other economic mineral carrier sediment.
Geophysical research by applying a geoelectrical method which is aimed to
know the underground sediment structure on the studied location.
Drilling activity, i.e. a drilling in ten points within 300 meter area. The depth
of the drilling ranges from 40 to 54 meters.
Laboratory analysis in order to determine the content of gold, zircon and
titanium in (grams/ton).
To evaluate the results and conclusions of the work carried out in the form
of exploration reports.
The secondary gold exploration activity within the IUP Eksplorasi Area of PT.
Aurum Persada Khatulistiwa is performed by the Field Geological Team ofPT.
Aurum Persada Khatulistiwa. The details are as follows:
1. Person in charge /
Team Leader : Ir. Nur Hidayat
2. Field Coordinator : Ir. Sukendro
3. Geological Mapping Team : a. Ir. Harry Hariyanto
b. Agus Priadi
c. Roni Kurniawan
d. Herlina
4. Test Pit and Hand Auger
Manager : a. Herlina, ST
b. Tantowi
5. Geophysics, Geoelectric Manager,
and Surveyor : a. Syarifuddin
b. Yogi Sugiana
c. Ramdani Hikmawan
The secondary gold, zircon, and titanium exploration fieldwork was performed in
the IUP location of PT. Aurum Persada Khatulistiwa in April-June 2013.
1.6.1. Population
Based on the projected population of 2011, the population of the Sintang Regency
is 371,322 persons or the average residents per village administrative unit is 1,296
persons. Compared with the population of 2010, the increase of residents per
village administrative unit is 25 persons. Compared with the area width of the
Sintang Regency, and the number and increase as referred to above, the Sintang
Regency can be categorized as a low-populated regency.
The number of sub-districts in the Sintang Regency is 14 sub-districts and the IUP
area of PT. Aurum Persada Khatulistiwa is located in two sub-districts, i.e. Sepauk
and Tempunak Sub-districts. From the observation on the Sintang Regency
population in 2011, the Sepauk Sub-district is the second place in terms of the
most populated area. Its population is 47,237 persons in which 24,550 residents
are male and the remaining 22,687 are female. The population growth percentage
is 1.79%. Meanwhile, the Tempunak Sub-district is on the sixth place with 27,255
persons, in which 14,281 residents are male and the remaining 12,974 are female.
Its population growth percentage is 1.47%. The density of the Sepauk sub-district
is 26 persons per km2 and 1,431 persons per village. Furthermore, the density of
the Tempunak sub-district is 27 persons per km2 and 1,136 persons per village.
1.6.2. Education
Kindergarten 78 -
Elementary School (26 schools);Junior High School (7 schools); and Senior High
School (1 school).
The government of the Sintang Regency always pays attention and work to
improve the public health degree or level due to humanity factor. Constructions of
public health facilities in Sintang in 2011 consist of 254 units, i.e. 2 Hospitals, 14
Polyclinics, 20 Public Health Centre, 107 Village Polyclinics (Polindes), and 110
Village Health Units (Poskedes).
Four diseases which are largely suffered by the residents of Sintang are
hypertension, heart disease, diabetes mellitus and upper respiratory tract
infections.
In terms of the development, the government of the Sintang Regency does not
only aim the physical development but also focus on the social welfare
development. The social welfare level has been increased to a higher level. The
government tries to improve the social welfare by educating poor people, isolated
people, prostitutes, disabled people, and orphanages.
According to the note of Social and People’s Empowerment Agency of the Sintang
Regency, there are 1,511 physically disabled people, 665 mentally disabled people
and 180 physically and mentally disabled people in 2011.
1.7. Agriculture
The Sintang Regency government develops four elements in the agricultural areas
in 2011, namely crops, plantations, fishery, and forestry.
1.7.1. Crop
In terms of the crop development, the Sintang Regency pays attention to the
cultivation of rice, crops, vegetables, and fruits. Rice, which is the staple food of
the Sintang residents, is targeted as a strategic commodity.
In 2011, the production of paddy fields in the Sintang area is 94,445 tons and the
planting area width is 36,566 ha, or the average production is 25.83
quintals/ha. Meanwhile, the rice yield is 72,164 tons from 22,377 ha area or the
average production is 32.25 quintals/ha.
For crops planted in 2011, there are peanuts, soybeans, green beans, and
cassava.
1.7.2. Plantation
Other plantation crop is coffee, but the production is still relatively insignificant.
In terms of fishery, the 2011 production is solely common carp fishes in which the
figure is 108.26 tons.
1.7.4. Forestry
The Sintang Regency is regency which has a relatively wide forest area, i.e.
21.99% of the territory. According to the Decree of the Minister of Forestry No.
259/KPS-11/2000 issued on 23rd August 2000, the Sintang Regency consists of:
National Park : 68,603 Ha.
Protection Forest : 446,799 Ha.
Limited Production Forest : 623,505 Ha.
Regular Production Forest : 188,465 Ha.
Tourist Forest : 1,334 Ha.
The IUP area of PT. Aurum Persada Khatulistiwa which is located on the APL area
(areal pemanfaatan lain–other utilization area) can be seen in figure 3.
1.8. Climate
The Sintang Regency is known as a high intensity wet area. The 2011 rainfall data
shows that the average rainfall in the Sintang Regency is 236.76 mm per month or
the average of rainy days of each month is 17 days.
In 2011, the month which has the highest average rainfall is November. The
rainfall is up to 375.8 mm and the number of rainy days is 19 days. Meanwhile,
the month with the lowest rainfall is June which is 78.1 mm and the number of
rainy days if 8 days.
When the rain intensity is high, it is usually followed with high speed winds. It
affects people’s activities.
CHAPTER II
GEOLOGY
In general, the geology of the West Kalimantan area is composed from rocks of
sediment, igneous and metamorphic rocks. The ages of the rocks, starting from
the oldest, are Early Cretaceous (pre-Tertiary), Tertiary to Recent rocks (alluvial
sediments).
If it is outlined based on the type of rocks, West Kalimantan can be divided into 3
(three) areas, i.e. south, central and north areas.
According to the above areas distribution, the IUP location of PT. Aurum Persada
Khatulistiwa is located on the Central area, i.e. Oligocene sediments rocks.
The regional stratigraphy surrounding the IUP Eksplorasi of PT. Aurum Persada
Khatulistiwa is composed by sediment rocks which are summarized in these
following rock formations (from the earliest):
Alluvial Sediment (Qa): the composing materials are sand, gravel, mud and plant.
Tebidah Formation (ToT): the rock units are greyishmudstone and siltstone on the
lower layer, intersection of greyish, reddish and greenish lithic sandstone and
mudstone on the upper layer. In some parts, coal seams are found.
Payak Formation (Teop): the rock units are intersections of sandstone, mudstone,
siltstone; local is richof fossil. The sandstone directional bunds are shown by dots.
Ingar Formation (Teu): Silat shards, Dangkan Sandstone, and Ingar Formation
(non-differentiable).
Selangkai Formation (Kse): base rocks surrounding the IUP area. The rock units
are mudstone, sandstone, lime siltstone, and non-limestone; several
sandstone/mudstone neatly covered by layered streaks, berakalan mudstone,
multi-materials conglomerate, limestone; local fossils. Experienced some tectonic
activities so various rocks were formed, and mélange or formation was damaged.
The sandstone directional bund is shown by dots.
According to the data observed in the Peta Geologi Lembar Sintang, Kalimantan
(Geological Map of Sintang Sheet, Kalimantan) by Reryanto, R., et. al. (1993), a
regionally geological structural map is made. Some are covered by alluvial
sediments (Qa). Materials in these alluvial sediments consist of mud, silt, sand and
gravel, which are mentioned to be beach, river and swamp sediments. Referring
to the surrounding area, i.e. the western and northern area of the IUP location of
PT. Aurum Persada Khatulistiwa, the general direction of the layer tends to be
west to northwest – east to southeast. The geological structure which is referred
2.2.1. Stratigraphy
Based on the data observed in the Geological Map of Sintang Sheet, Kalimantan
by Reryanto, R., et. al. (1993), the rocks lithology description on the IUP location
of PT. Aurum Persada Khatulistiwa consists of, from the upper layer:
Alluvial sediment (Qa): the materials are sand, gravel, mud and plant. It
was accumulated on the Quarter Period.
Tebidah Formation (Tot): the rock units consist of greyish mudstone and
siltstone on the lower layer, intersection of greyish, reddish and greenish
lithic sandstone and mudstone on the upper layer.
The presence of alluvial sediment (Qa) and Tebidah Formation sediment (Tot),
and morphology which tends to be lands, makes the observation on the geological
structure in the research location, difficult. The research location is the IUP
location of PT. Aurum Persada Khatulistiwa.
14
Chapter-II Geology
2.2.3.1. Distribution
The deposits which are the target of research are the presence of gold in the
alluvial sediment (secondary gold deposit). For such purpose, the research priority
is given to areas which have thick alluvial deposits and the presence of base rocks
which are the base of gold deposits. Usually the presence of gravels and pebbles
can also be found on such deposits.
This research measures three minerals, i.e. gold, zircon and titanium. However,
the main target is to found gold deposits which is economically valuable for
mining.
The resources clarification applies the Joint Ore Reserve Committee (JORC)
method, i.e.:
In order to calculate the gold resource in the alluvial sediment or sediment rocks,
two phases are taken, i.e. measurement of alluvial sediment or sediment rocks (S)
ton and measurement of secondary gold deposits in three resources (measured,
SDTerukur; observable, SDTerunjuk; and estimable, SDTereka).
S = A x T x SG x G
Notes:
S= Alluvial Sediment or Sediment Rocks Ton (ton)
A= Area width in accordance with the category (m2) which is circle
formed. (A = πr2). R is radius (diameter). The radius of measureable
resource is 250 meters; observable resources radius is 500 meter;
and estimable resources radius is 1,000 meters.
T = thickness, the vertical thickness of alluvial sediments and sediment rocks
(m)
SG = Specific gravity (density) of the alluvial sediment or sediment rocks,
i.e. 2.62 – 2.75 (Hary Cristiady, 1992, Mekanika Tanah).
G= Geological Loses (10%)
The formula applied in the measurement of alluvial sediment or sediment rocks (S)
ton is:
Notes:
SDTerukur = Gold deposit resources for 250 meter radius width
SDTerunjuk = Gold deposit resources for 500 meter radius width
SDTereka = Gold deposit resources for 1,000 meter radius width
S= ton of the alluvial sediment or sediment rocks
Gr = grade, gold content for 2 meter thickness in gram/ton.
The previous researchers to conduct a study within the IUP location of PT. Aurum
Persada Khatulistiwa are public and private institutions.
Several scientific publications and previous reports which come from the studies
within the IUP location of PT. Aurum PersadaKhatulistiwa are as follows.
CHAPTER III
RESEARCH ACTIVITIES
The series of work phases in the alluvial gold exploration within the IUP location of
PT. Aurum Persada Khatulistiwa, includes a study of literature on the research
area and field preparation, geological mapping and test pit construction and
shallow drilling by using hand auger, geoelectrical and drilling works, and
laboratory analysis.
Prior to the field research, some preparations on the IUP Location of PT. Aurum
Persada Khatulistiwa are performed, among others: study of literature on the
research area, basic map procurement for field activities, i.e. topographic map
scaled 1 : 5,000, Geological Map, Sintang Sheet, Kalimantan, scaled 1 : 250,000,
geological field tools and other equipment.
The field geological tools and equipment usually used in the exploration, including
repeated exploration in the IUP location of PT. Aurum Persada Khatulistiwa, are:
Jacro 175 drill machine, basic map (atopographic map scaled 1 : 5,000),
Navigational GPS (Garmin, GPSmap 60 CSx), geological compass, geological
hammer, suuntho azimuth, suuntho clino, digital camera, meter (5 m), coal
sampling bags, digging tools (crowbar, hoe, etc.), stationary, medicine (first aid),
field bags, field tent tools (flying camp), boots, rain coats, etc.
The width of the IUP location of PT. Aurum Persada Khatulistiwa is 1,000 Ha. The
research in the IUP location of PT. Aurum Persada Khatulistiwa applies two
research methods. First, whole areas of PT. Aurum Persada Khatulistiwa’s IUP
location apply a geological mapping method. Meanwhile, the 300 Ha area located
on the northern party of the PT. Aurum Persada Khatulistiwa’s IUP location applies
a semi-detailed exploration. The report preparation refers to the Joint Ore Reserve
Committee (JORC) Standard.
The geological mapping is performed by a line method in which lines traces hills
and river flows. The rock exposure tracing and observation is performed on the
river flow, top soil openings and other exposures. Every information on exposures
or other observations found is used to determine the geographical positions and
elevation. The observation and coordinate setting of the observation location is
recorded by a global positioning system (GPS) tool.
The test pit construction is aimed to find the alluvial sediment layers from the
surface to the end depth of the pit. The size of the pit is 2 x 2 meters and the
depth is 3-4 meters. In addition to the lithological structure of rocks on the pit
wall, material on such wall is taken and panned. The number of gold grains on the
panning will be an indication whether the area is prospective.
The shallow drilling has the same purpose with the test pit construction. The
difference is only the materials taken by hand augers are limited and observations
on the rock lithology are only observed via materials taken by hand augers. The
depth of hand auger drilling is limited, i.e. 2-3 meters only.
Such geophysics work (geoelectrical method) is the guide for the next exploration
work, i.e. drilling work, in which the drill position and drilling depth target are
conclusions expected from this geoelectrical work.
3.2.4. Drilling
The exploration drilling work to be performed within the OP IUP area of PT. Aurum
Persada Khatulistiwa applies a full coring method, i.e. a drilling by taking a coring
from the commencement of the drilling up to the end depth of the drilling work.
The drill used is a win, i.e. a drill completed by cables to raise and lower the core
barrel without raising the already planted drilling pipe.
In the drilling activity, the drill machine is operated by a drill operator assisted by
several assistants. Meanwhile, the supervision of the drilling work is conducted by
a geologist who acts as a well site.
The drill core (core) which is a rock layer taken from the drilling work, is divided
into 2 (two) parts. One part will be filed and the other party will be sent to a
laboratory.
A laboratory work holds an important role in every gold exploration, either primary
or secondary. The capacity and accreditation of the laboratory used for analyzing
research targeted elements are keys of reliability rate on the exploration result.
In order to analyze elements which are this research’s target, i.e. gold (Au), zircon
(Zr) and titanium (Ti), the research team uses Intertek Lab.
The topographic mapping measures every drilling point, i.e. 10 (ten) drilling points
and map 163 Ha or 300 Ha area which is assumed to have potential on the alluvial
gold deposits. Such locations are on the northern part of the PT. Aurum Persada
Khatulistiwa’s IUP block.
The topographic map scale is 1 : 2,000 and 1 : 1,000. The 1 : 2,000 scale is
applied for the imaging of a geological map of the research area exploration and
the 1 : 1,000 scale is applied for making a mining plan.
CHAPTER IV
4.1.1 Geomorphology
From the observation of topographic map and image map, the research site can
be classified into two morphological units, they are River Plain Morphological Unit
and Wavy-Slope Hills Morphological Unit.
This morphological unit occupies 35% of the area of IUP PT Aurum Persada
Khatulistiwa and lies around Kapuas River. It is about 25-35 m above sea level.
This morphological unit occupies 65% of the area of IUP PT Aurum Persada
Khatulistiwa, the areas rather far from Kapuas River. This unit is marked with
wavy-slope hills lies at its center. It is about 18-39 m above sea level.
4.1.3 Stratigraphy
Based on field research conducted within the area of IUP PT Aurum Persada
Khatulistiwa, particularly from drilling works, there are 3 (three) units of stone
found, they are (from oldest to the youngest) Sedimentary alluvial unit, sandstone
unit, and Mudstone unit.
Sedimentary alluvial unit occupies the bank of Kapuas River and basins at the
center of site. The materials composing this unit are pebble, gravel, sand, silt, and
clay.
Sedimentary alluvial unit covers 70% of surface area of IUP PT Aurum Persada
Khatulistiwa.
The sandstone unit lies beneath Sedimentary alluvial. In several spots, sandstone
outcrops occur as a result of lifting. This unit occupies 20% of IUP area.
The sandstone unit is composed by grayish, yellowish, reddish, and brownish sand
with soft to hard grain. Some silt is also found, with brittle to hard rigidity.
The Mudstone unit lies beneath sandstone unit. In several spots, sandstone
outcrops occur as a result of lifting. This unit occupies 10% of IUP area.
The Mudstone unit is composed by grayish, yellowish, reddish, and brownish clay-
silt mineral with brittle to hard rigidity.
From the structure of stratigraphy found in the site, the estimated geological
history occurs within the area of IUP PT Aurum Persada Khatulistiwa and
surrounding is Mudstone unit that was precipitated during Oligocene era. Based on
the stone observation, it is presumed that precipitation was occurred in land.
During the same era, Oligocene, sandstone was also precipitated. The relation of
both unit precipitations is consistent.
The indication of Sedimentary Gold availability within the area of IUP PT Aurum
Persada Khatulistiwa has been proven by the presence of gold miners. Generally,
they use spraying machine and sluice box, a 1-2 meter carpet-layered board.
The method of such gold mining goes with the following stages. First, spraying the
wall or any part allegedly contains alluvial gold grain. Slowly, the material will
collapse and fall down with the water from the sprayer and becomes sediment
that brings mud-to-chunk-size material. The materials will be collected in pits
previously prepared.
Second, the materials collected in the pits are sprayed to sluice box using other
spraying machine. The sluice box must be equipped with screen as a separator.
The lump is disposed to the rear part while the small parts are down through the
screen and then to sluice box. Gold grains, as mineral with high specific gravity
(19.32), is expected to keep flowing by penetrating vertically and caught by
carpet’s fibers.
Third, the material trapped in carpet will be panned afterward to separate gold
grain from other impurities. The gold obtained that way is secondary gold.
Naturally it has 60%-90% degree so it can be cashed out or sold to the receivers
usually come to pick it up.
The existence of alluvial Sedimentary Gold within the area of IUP PT Aurum
Persada Khatulistiwa is also expected to have the same potential with the other
mining areas. The observation of test pits as well as material panning out of such
test pits indicating the existence of gold grain in each panning.
To find out the potential more exactly (real), the next exploration works is to
conduct geo-electrical inspection, take samples with hand auger, and run
laboratory analysis as to Sedimentary Gold content and other desirable minerals
(Zr dan Ti).
The result presented in Sin-20 is the interpreted result of the combination among
test pits, hand auger, and geo-electrical works. It is estimated that the alluvial
Sedimentary Gold lies at 10-16 m depth and is assumed as sand sediment. The
drilling point is L2-E130.
The result presented in Sin-21 is the interpreted result of the combination among
test pits, hand auger, and geo-electrical works. It is estimated that the alluvial
Sedimentary Gold lies at 0-2 m depth and is assumed as Sedimentary alluvial. The
drilling point is L-21-80.
The result presented in Sin-22 is the interpreted result of the combination among
test pits, hand auger, and geo-electrical works. It is estimated that the alluvial
Sedimentary Gold lies at 0-2 m depth and is assumed as Sedimentary alluvial. The
drilling point is L-22 E160.
The result presented in Sin-25 is the interpreted result of the combination among
test pits, hand auger, and geo-electrical works. It is estimated that the alluvial
Sedimentary Gold lies at 0-2 m depth and is assumed as Sedimentary alluvial. The
drilling point is L-25 E 150.
The result presented in Sin-27 is the interpreted result of the combination among
test pits, hand auger, and geo-electrical works. It is estimated that the alluvial
Sedimentary Gold lies at 0-2 m depth and is assumed as Sedimentary alluvial.
There are 2 (two) drilling points; L27 E80 and L-27 E 80 + 100 M/127-130.
Drilling works for alluvial Sedimentary Gold exploration within the area of IUP PT
Aurum Persada Khatulistiwa have been carried out in 10 (ten) drilling points. The
coordinates and elevation of the drilling points are presented in the Table 4.1
below.
Table 4.1
Coordinates of Drilling Points, Elevation, and Depth of Each Drilling Pits
Total
Auger East North Elev
No. Depth
Number Longitude Latitude (m)
(m)
1 L -20 EL 80 111° 17’ 55,97” 0° 7’ 53,70” 55 50
2 L -20 EL 84 111° 17’ 53,25” 0° 7’ 55,49” 58 50
3 L -20 EL 130 111° 17’ 57,04” 0° 7’ 54,87” 53 50
4 L -21 EL 80 111° 17’ 52,02” 0° 7’ 48,22” 53 50
5 L -20 EL 160 111° 17’ 48,08” 0° 7’ 44,77” 47 45
6 L -25 EL 90 111° 17’ 45,72” 0° 7’ 55,03” 42 54
7 L -25 EL 150 111° 17’ 46,94” 0° 7’ 56,30” 50 50
8 L -27 EL 100 111° 17’ 57,69” 0° 8’ 3,37” 60 50
9 L -27 EL 130 111° 17’ 55,29” 0° 8’ 5,62” 56 50
10 L Quarry 2 111° 17’ 53,90” 0° 7’ 55,65” 58 51,5
Structure of lithology obtained from drilling with Auger No. L-20 EL80 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 6.5 m) ;
Siltstone (6.5 – 12 m) ;
Mudstone (12 – 28.8 m) ;
Siltstone (28.8 - 34 m) ;
Mudstone (34 – 48 m); dan
Siltstone (48 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-20 EL84 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 8.5 m) ;
Siltstone (8.5 – 18 m) ;
Mudstone with coal insertion (18 – 19.6 m) ;
Siltstone (19.6 - 44 m) ; and
Sandstone (44 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-20 EL130 from the
surface to ultimate depth is:
Sedimentary alluvial (0 - 6 m) ;
Sandstone (6 – 17 m) ;
Siltstone (17 – 28 m) ;
Mudstone (28 - 40 m) ;
Sandstone (40 – 42 m) ; and
Mudstone (42 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-21 EL80 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 5.5 m) ;
Siltstone (5.5 - 25 m) ; and
Mudstone (25 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-20 EL160 from the
surface to ultimate depth is:
Structure of lithology obtained from drilling with Auger No. L-25 EL90 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 3.5 m) ;
Siltstone (3.5 – 11 m) ;
Mudstone (11 – 17.5 m) ;
Siltstone (17.5 - 32 m) ; and
Mudstone (32 – 54 m).
Structure of lithology obtained from drilling with Auger No. L-25 EL150 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 8.5 m) ;
Siltstone (8.5 – 18 m) ;
Mudstone with coal insertion (18 – 19.6 m) ;
Siltstone (19.6 - 44 m) ; and
Sandstone (44 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-27 EL100 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 23.2 m) ;
Siltstone (23.2 – 27.8 m) ;
Mudstone (27.8 – 38 m) ;
Siltstone (38 – 42.6 m) ; and
Mudstone (42.6 – 50 m).
Structure of lithology obtained from drilling with Auger No. L-27 EL130 from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 5.2 m) ;
Siltstone (5.2 – 11.3 m) ;
Mudstone (11.2– 15.3 m) ;
Siltstone (15.3 - 24 m) ;
Sandstone (24 – 28 m) ; and
Mudstone (28 – 50 m).
Structure of lithology obtained from drilling with Auger No. L Quarry from the
surface to ultimate depth is:
Sedimentary alluvial (0 – 1 m) ;
Siltstone (1 – 21 m) ; and
Mudstone (21 – 51.5 m).
The selected location is part of 130 Ha previously explored. The target of this
sample retaking is to choose location that is exactly a recent sedimentary alluvial.
From this re-exploration, it is found 39.9 Ha of alluvial plain at the center of 130
Ha previously explored. This sedimentary is stretched from east to west,
overgrown by bush, and sandwiched by mass rubber plantation.
The tools used to take sedimentary alluvial samples are hand auger and water
auger. Hand auger can reach its maximum depth up to 8.5 meter. The tool must
be spun by the 4 operators operating it on the selected location. The alluvial taken
by the hand auger will be the sample to be taken its concentrate. Whereas for
water auger, the pressure of water caused by the tool will push the material to the
surface and will be the sample to be further processed. Afterward, materials
obtained from both tools will be weighted, panned, and taken its concentrate. The
concentrate from panning will be weighted then and used as data in calculating
the quantity of reserves.
There are 150 samples delivered to the laboratory of PT Intertek Utama Services.
Those samples were taken up to 30 meter depth, one sample for every 2 (two) m.
That is why there are 15 (fifteen) samples for each drilling pit, or 150 samples for
10 (ten) drilling pits. The analysis can be seen in Table 4.2 – Table 4.12.
The analysis from 130 samples revealed that the gold content is very low, while
the zirconium and titanium contents are higher than the gold content.
Gold (Au)
For gold content within 47.6 Ha area, the highest amount is from pit number APK-
CST-70 (155 ppm or gram/ton), while the lowest amount is from pit number APK-
CST-15A (0.023 ppm). The average amount of gold content in concentrate within
the research site is 5.3 gram/ton.
Zirconium (Zr)
The total area explored for zirconium is 45.3 Ka. The analysis to determine
zirconium content is conducted toward zirconium dioxide (ZrO2) and zirconium
element (Zr). The highest amount of ZrO2 is from the concentrate taken from pit
number APK-CST-72 (41.4% or 414,000 ppm or gram per ton), while the lowest
amount is from several pits, among others, number APK-CST-36 (0.03% or 300
ppm). The average amount of ZrO2 content within the research site is 2.346% or
23.4460 gram/ton.
Titanium (Ti)
Similar to zirconium, the analysis is conducted toward titanium dioxide (TiO2) and
titanium element (Ti). The highest amount of TiO2 or Ti content is from pit
number APK-CST-63 (2,65% or 26.500 ppm or gram per ton), while the lowest
amount is from several pits, among others, number APK-CST-32 (0,14% or 1,400
ppm). The average amount of TiO2 content within the research site is 0.8847% or
8.847 gram/ton.
From the lab analysis of gold (Au), zirconium dioxide (ZrO2), and titanium dioxide
(TiO2), it is obtained data for the highest content, the lowest content, and
average content of each mineral. Such data along with the quantity of resources
for those three minerals can be seen in the table 4.4 below.
Tabel 4.6
The content of each mineral within the research area of 47.57 Ha and
calculation of resources for Au, ZrO2 and TiO2.
TABEL 4.2
SEDIMENTARY ALLUVIAL SAMPLE AND ANALYSIS OF ELEMENTS TOWARD THEIR CONCENTRATES
WITHIN THE AREA OF IUP PT AURUM PERSADA KHATULISTIWA, KECAMATAN SEPAUK, KAB. SINTANG - KALBAR
COORDINATES Sample ANALYSIS RESULT
Alluvial Sample
Elevation Concentrate
No. Sample Code BT LS Thickness Weight Au Ag ZrO2 TiO2
Weight
° ' " ° ' " (m) (m) (kg) (kg) ppm ppm % %
1 APK-CST- 1 111 17 51 0 8 6,3 43 1,5 21 1,5 0,067 <1 0,05 0,33
2 APK-CST- 2 111 17 56,6 0 8 8,2 43 2 23 2 0,054 <1 1,01 2,33
3 APK-CST- 11 111 17 58,2 0 8 5,3 47 1,5 32 2 0,064 <1 0,05 0,37
4 APK-CST- 14 111 17 23 0 7 9,5 24 3,2 10 0,3 0,047 <1 0,04 1,86
5 APK-CST- 15A2 111 17 44,4 0 7 54,5 32 6 28 1,1 0,023 <1 0,58 0,55
6 APK-CST- 16 111 17 49,1 0 7 55,7 30 4 6,5 2 0,033 <1 0,12 0,36
7 APK-CST- 17 111 17 54 0 7 57 63 3 19,1 1,5 1,06 <1 0,09 1,57
8 APK-CST- 18 111 17 58,9 0 7 56,9 51 0,6 2,5 0,9 0,039 <1 0,07 0,21
9 APK-CST- 23 111 17 41,9 0 7 49,9 29 1 0 0 0,26 <1 0,03
10 APK-CST- 24 111 17 48 0 7 50,3 38 3 18,5 1 1,46 <1 0,38 1,57
11 APK-CST- 25 111 17 52 0 7 52,4 54 2 19,5 1,5 0,055 <1 0,05 0,21
Considering that the previous exploration reveals very low analysis result, retaking
samples is conducted. Therefore, the data used for calculating sedimentary alluvial
resources, namely for the elements being the target of this research (Au, ZrO2 dan
TiO2) is the data from the re-exploration.
The total area of IUP PT Aurum Persada Khatulistiwa is 1,000 hectares. But the
total area being thoroughly explored is 47.57 Ha. The samples being analyzed and
its result being the basis of resource calculation is 36 samples for gold (Au), 35 for
zirconium dioxide (ZrO2), and 32 for titanium dioxide (TiO2).
The result of calculation of resources that can also be called as reserves can be
seen in Table 4.3, Table 4.4 and Table 4.5.
The quantity of sedimentary alluvial resources within the research site (47.57 Ha)
is 683,613.045 gram or 683.6 kg or for every hectare of research site there are
17,756.183 gram of gold (Au) or 14.37 kg.
The quantity of sedimentary ZrO2 resources within the research site (47.57 Ha) is
1,079.3 ton or for every hectare of research site there are 22.7 Ton of ZrO2.
The quantity of sedimentary TiO2 resources within the research site (47.57 Ha) is
2,629.7 ton or for every hectare of research site there are 55.3 ton of TiO2.
TABLE 4.3
CALCULATION OF SEDIMENTARY GOLD RESERVES WITHIN THE RESEARCH AREA OF 39.9 HA
IN THE LOCATION OF IUP PT AURUM PERSADA KHATULISTIWA, KECAMATAN SEPAUK, KAB. SINTANG – KALBAR
Total ANALYSIS RESULT RESERVES
Alluvial Specific Alluvial Concentrate
Impact Volume Sample
No. Sample Code Thickness Gravity Weight Concentrate Au Weight Au (gold)
Area (m³) Weight
(m) (gr/cm³) (ton) (kg) ppm (ton) (gram)
(m²) (kg)
1 APK-CST- 1 40.000 1,5 60.000 2,6 156.000 21 1,5 0,067 11.143 746,571
2 APK-CST- 2 18.750 2 37.500 2,6 97.500 23 2 0,054 8.478 457,826
3 APK-CST- 11 17.500 1,5 26.250 2,6 68.250 32 2 0,064 4.266 273,000
4 APK-CST- 14 19.687 3,2 62.998 2,6 163.796 10 0,3 0,047 4.914 230,952
5 APK-CST- 15A2 7.500 6 45.000 2,6 117.000 28 1,1 0,023 4.596 105,718
6 APK-CST- 16 7.500 4 30.000 2,6 78.000 6,5 2 0,033 24.000 792,000
7 APK-CST- 17 22.500 3 67.500 2,6 175.500 19,1 1,5 1,06 13.783 14.609,686
8 APK-CST- 18 22.500 0,6 13.500 2,6 35.100 2,5 0,9 0,039 12.636 492,804
9 APK-CST- 24 3.125 3 9.375 2,6 24.375 18,5 1 1,46 1.318 1.923,649
10 APK-CST- 25 22.500 2 45.000 2,6 117.000 19,5 1,5 0,055 9.000 495,000
11 APK-CST- 31 22.500 2 45.000 2,6 117.000 4 0,25 0,096 7.313 702,000
12 APK-CST- 32 8.750 4 35.000 2,6 91.000 22,5 2,25 1,98 9.100 18.018,000
13 APK-CST- 32B 3.750 1 3.750 2,6 9.750 27 2,75 0,041 993 40,715
14 APK-CST- 36 22.500 2,3 51.750 2,6 134.550 1,5 1,5 0,23 134.550 30.946,500
15 APK-CST- 50 10.000 5,3 53.000 2,6 137.800 30,5 4,5 0,083 20.331 1.687,485
16 APK-CST- 51R 8.500 3,2 27.200 2,6 70.720 18 1,2 0,05 4.715 235,733
17 APK-CST- 52 10.000 6,15 61.500 2,6 159.900 68,65 6 0,076 13.975 1.062,118
18 APK-CST- 53 7.500 6,7 50.250 2,6 130.650 44,45 5,5 0,063 16.166 1.018,453
19 APK-CST- 54 12.500 4,7 58.750 2,6 152.750 14,5 1,8 0,047 18.962 891,217
20 APK-CST- 55 9.375 3 28.125 2,6 73.125 4,5 0,5 0,096 8.125 780,000
21 APK-CST- 56 2.500 3 7.500 2,6 19.500 12 1 0,12 1.625 195,000
22 APK-CST- 57 5.625 2 11.250 2,6 29.250 14,75 1,2 0,11 2.380 261,763
23 APK-CST- 58 9.375 2,3 21.563 2,6 56.063 15,5 1,2 0,087 4.340 377,608
24 APK-CST- 59 12.500 2 25.000 2,6 65.000 13,5 1,2 0,1 5.778 577,778
25 APK-CST- 60 12.500 3 37.500 2,6 97.500 16,5 1 0,17 5.909 1.004,545
26 APK-CST- 61 12.500 2,5 31.250 2,6 81.250 12 1,3 0,13 8.802 1.144,271
27 APK-CST- 62 5.625 2,3 12.938 2,6 33.638 28 2,7 0,15 3.244 486,542
28 APK-CST- 63 12.500 2,3 28.750 2,6 74.750 19 2 0,12 7.868 944,211
29 APK-CST- 64 2.500 3 7.500 2,6 19.500 15 1,8 0,089 2.340 208,260
30 APK-CST- 65 3.750 2,2 8.250 2,6 21.450 23 1,5 0,084 1.399 117,509
31 APK-CST- 66 3.125 2,1 6.563 2,6 17.063 20,5 2,4 0,13 1.998 259,683
32 APK-CST- 67 6.250 3 18.750 2,6 48.750 21 1,5 0,12 3.482 417,857
33 APK-CST- 70 22.500 6 135.000 2,6 351.000 230 2,3 16 4.596 56.160,000
34 APK-CST- 71 22.500 4 90.000 2,6 234.000 180 2,4 2,1 24.000 6.552,000
35 APK-CST- 72 22.500 5 112.500 2,6 292.500 200 2,2 155 12.636 498.712,500
36 APK-CST- 73 22.500 6 135.000 2,6 351.000 220 2,5 10,2 993 40.684,091
TABLE 4.4
CALCULATION OF SEDIMENTARY ZIRCONIUM DIOXIDE (ZrO2) RESERVES WITHIN THE RESEARCH AREA OF 39.9 HA
IN THE LOCATION OF IUP PT AURUM PERSADA KHATULISTIWA, KECAMATAN SEPAUK, KAB. SINTANG – KALBAR
Total ANALYSIS RESULT Weight RESERVES
Alluvial Specific Alluvial
Impact Volume Sample
No. Sample Code Thickness Gravity Weight Concentrate ZrO2 ZrO2 Concentrate ZrO2
Area Weight
(m²) (m) (m³) (gr/cm³) (ton) (kg) (kg) (%) (gram/ton) (ton) (ton)
1 APK-CST- 1 40.000 1,5 60.000 2,6 156.000 21 1,5 0,05 500 11.143 5,571
2 APK-CST- 2 18.750 2 37.500 2,6 97.500 23 2 1,01 10100 8.478 85,630
3 APK-CST- 11 17.500 1,5 26.250 2,6 68.250 32 2 0,05 500 4.266 2,133
4 APK-CST- 14 19.687 3,2 62.998 2,6 163.796 10 0,3 0,04 400 4.914 1,966
5 APK-CST- 15A2 7.500 6 45.000 2,6 117.000 28 1,1 0,58 5800 4.596 26,659
6 APK-CST- 16 7.500 4 30.000 2,6 78.000 6,5 2 0,12 1200 24.000 28,800
7 APK-CST- 17 22.500 3 67.500 2,6 175.500 19,1 1,5 0,09 900 13.783 12,404
8 APK-CST- 18 22.500 0,6 13.500 2,6 35.100 2,5 0,9 0,07 700 12.636 8,845
9 APK-CST- 24 3.125 3 9.375 2,6 24.375 18,5 1 0,38 3800 1.318 5,007
10 APK-CST- 25 22.500 2 45.000 2,6 117.000 19,5 1,5 0,05 500 9.000 4,500
11 APK-CST- 31 22.500 2 45.000 2,6 117.000 4 0,25 0,03 300 7.313 2,194
12 APK-CST- 32 8.750 4 35.000 2,6 91.000 22,5 2,25 0,37 3700 9.100 33,670
13 APK-CST- 32B 3.750 1 3.750 2,6 9.750 27 2,75 0,05 500 993 0,497
14 APK-CST- 36 22.500 2,3 51.750 2,6 134.550 1,5 1,5 0,03 300 134.550 40,365
15 APK-CST- 50 10.000 5,3 53.000 2,6 137.800 30,5 4,5 0,09 900 20.331 18,298
16 APK-CST- 51R 8.500 3,2 27.200 2,6 70.720 18 1,2 0,03 300 4.715 1,414
17 APK-CST- 52 10.000 6,15 61.500 2,6 159.900 68,65 6 0,13 1300 13.975 18,168
18 APK-CST- 53 7.500 6,7 50.250 2,6 130.650 44,45 5,5 0,1 1000 16.166 16,166
19 APK-CST- 54 12.500 4,7 58.750 2,6 152.750 14,5 1,8 0,07 700 18.962 13,273
20 APK-CST- 55 9.375 3 28.125 2,6 73.125 4,5 0,5 0,05 500 8.125 4,063
21 APK-CST- 56 2.500 3 7.500 2,6 19.500 12 1 0,12 1200 1.625 1,950
22 APK-CST- 57 5.625 2 11.250 2,6 29.250 14,75 1,2 0,16 1600 2.380 3,807
23 APK-CST- 58 9.375 2,3 21.563 2,6 56.063 15,5 1,2 0,05 500 4.340 2,170
24 APK-CST- 59 12.500 2 25.000 2,6 65.000 13,5 1,2 0,05 500 5.778 2,889
25 APK-CST- 60 12.500 3 37.500 2,6 97.500 16,5 1 0,15 1500 5.909 8,864
26 APK-CST- 61 12.500 2,5 31.250 2,6 81.250 12 1,3 0,21 2100 8.802 18,484
27 APK-CST- 62 5.625 2,3 12.938 2,6 33.638 28 2,7 0,08 800 3.244 2,595
28 APK-CST- 63 12.500 2,3 28.750 2,6 74.750 19 2 1,69 16900 7.868 132,976
29 APK-CST- 64 2.500 3 7.500 2,6 19.500 15 1,8 0,07 700 2.340 1,638
30 APK-CST- 65 3.750 2,2 8.250 2,6 21.450 23 1,5 0,56 5600 1.399 7,834
31 APK-CST- 66 3.125 2,1 6.563 2,6 17.063 20,5 2,4 0,32 3200 1.998 6,392
32 APK-CST- 67 6.250 3 18.750 2,6 48.750 21 1,5 1,14 11400 3.482 39,696
33 APK-CST- 70 22.500 6 135.000 2,6 117.000 230 2,3 15,57 155700 1.170 182,169
34 APK-CST- 71 22.500 4 90.000 2,6 78.000 180 2,4 17,15 171500 1.040 178,360
35 APK-CST- 72 22.500 5 112.500 2,6 35.100 200 2,2 41,4 414000 386 159,845
TABLE 4.5
CALCULATION OF SEDIMENTARY TITANIUM DIOXIDE (TiO 2) RESERVES WITHIN THE RESEARCH AREA OF 39.9 HA
IN THE LOCATION OF IUP PT AURUM PERSADA KHATULISTIWA, KECAMATAN SEPAUK, KAB. SINTANG – KALBAR
Total ANALYSIS RESULT RESERVES
Alluvial Specific Alluvial Concentrate
Impact Volume Sample
No. Sample Code Thickness Gravity Weight Concentrate TiO2 TiO2 Weight TiO2
Area (m³) Weight
(m) (gr/cm³) (ton) (kg) (%) (gram/ton) (ton) (ton)
(m²) (kg)
1 APK-CST- 1 40.000 1,5 60.000 2,6 156.000 21 1,5 0,33 3300 11.143 36,771
2 APK-CST- 2 18.750 2 37.500 2,6 97.500 23 2 2,33 23300 8.478 197,543
3 APK-CST- 11 17.500 1,5 26.250 2,6 68.250 32 2 0,37 3700 4.266 15,783
4 APK-CST- 14 19.687 3,2 62.998 2,6 163.796 10 0,3 1,86 18600 4.914 91,398
5 APK-CST- 15A2 7.500 6 45.000 2,6 117.000 28 1,1 0,55 5500 4.596 25,280
6 APK-CST- 16 7.500 4 30.000 2,6 78.000 6,5 2 0,36 3600 24.000 86,400
7 APK-CST- 17 22.500 3 67.500 2,6 175.500 19,1 1,5 1,57 15700 13.783 216,389
8 APK-CST- 18 22.500 0,6 13.500 2,6 35.100 2,5 0,9 0,21 2100 12.636 26,536
9 APK-CST- 24 3.125 3 9.375 2,6 24.375 18,5 1 1,57 15700 1.318 20,686
10 APK-CST- 25 22.500 2 45.000 2,6 117.000 19,5 1,5 0,21 2100 9.000 18,900
11 APK-CST- 31 22.500 2 45.000 2,6 117.000 4 0,25 0,14 1400 7.313 10,238
12 APK-CST- 32 8.750 4 35.000 2,6 91.000 22,5 2,25 1,62 16200 9.100 147,420
13 APK-CST- 32B 3.750 1 3.750 2,6 9.750 27 2,75 0,47 4700 993 4,667
14 APK-CST- 36 22.500 2,3 51.750 2,6 134.550 1,5 1,5 0,56 5600 134.550 753,480
15 APK-CST- 50 10.000 5,3 53.000 2,6 137.800 30,5 4,5 0,38 3800 20.331 77,258
16 APK-CST- 51R 8.500 3,2 27.200 2,6 70.720 18 1,2 0,4 4000 4.715 18,859
17 APK-CST- 52 10.000 6,15 61.500 2,6 159.900 68,65 6 0,81 8100 13.975 113,199
18 APK-CST- 53 7.500 6,7 50.250 2,6 130.650 44,45 5,5 0,46 4600 16.166 74,363
19 APK-CST- 54 12.500 4,7 58.750 2,6 152.750 14,5 1,8 0,43 4300 18.962 81,537
20 APK-CST- 55 9.375 3 28.125 2,6 73.125 4,5 0,5 0,43 4300 8.125 34,938
21 APK-CST- 56 2.500 3 7.500 2,6 19.500 12 1 1,24 12400 1.625 20,150
22 APK-CST- 57 5.625 2 11.250 2,6 29.250 14,75 1,2 0,73 7300 2.380 17,372
23 APK-CST- 58 9.375 2,3 21.563 2,6 56.063 15,5 1,2 0,7 7000 4.340 30,382
24 APK-CST- 59 12.500 2 25.000 2,6 65.000 13,5 1,2 0,44 4400 5.778 25,422
25 APK-CST- 60 12.500 3 37.500 2,6 97.500 16,5 1 1,2 12000 5.909 70,909
26 APK-CST- 61 12.500 2,5 31.250 2,6 81.250 12 1,3 0,76 7600 8.802 66,896
27 APK-CST- 62 5.625 2,3 12.938 2,6 33.638 28 2,7 0,81 8100 3.244 26,273
28 APK-CST- 63 12.500 2,3 28.750 2,6 74.750 19 2 2,65 26500 7.868 208,513
29 APK-CST- 64 2.500 3 7.500 2,6 19.500 15 1,8 0,35 3500 2.340 8,190
30 APK-CST- 65 3.750 2,2 8.250 2,6 21.450 23 1,5 1,53 15300 1.399 21,403
31 APK-CST- 66 3.125 2,1 6.563 2,6 17.063 20,5 2,4 1,1 11000 1.998 21,973
32 APK-CST- 67 6.250 3 18.750 2,6 48.750 21 1,5 1,74 17400 3.482 60,589
4.6 Logistics
IUP PT Aurum Persada Khatulistiwa is located around the bank of Kapuas River,
30 km (straight distance) toward the downstream of Sintang City. Kapuas River
around IUP has 200-300 m length and 4-8 meter depth. With that dimension, this
river can be used to transport mining tools, future mining products (zirconium
dioxide (ZrO2) and titanium dioxide (TiO2)) and other logistics.
----------------
CHAPTER.V
5.1 Conclusion
Some conclusions drawn and included into this temporary re-exploration report
are as follows:
Lab result indicates the sandstone and mudstone units, which is part of
5. Total area of sedimentary alluvial being the research site is 47.57 Ha.
From the drilling works, the thickest sedimentary alluvial is 6.7 m while
6. The highest gold content is 155 gram/ton, the lowest is 0.023 gram/ton.
hectare within area of 47.57 Ha is 14.37 kg. For the highest, lowest, and
ZrO2 is 1,079.3 ton or the content for each hectare within area of 47.57
is 2,629.7 ton or the sedimentary TiO2 resource for each hectare within
area of 47.57 Ha is 55.2 ton. For the highest, lowest, and average content
Table 5.1
9. IUP is located on the bank of Kapuas River. Its capacity can be used as
stage.
10. The land use within the research site is bush and mass rubber plantation.
5.2 SUGGESTION
1. The total area of IUP PT Aurum Persada Khatulistiwa is 1,000 Ha, whereas
the research in this report only utilizes 47.57 Ha. Such research site can be
made as initial mining works, and then developed to other parts within IUP.
The other parts of area are assumed to potentially contain gold, zircon, and
titan minerals.
in the future.