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    Chagai & Raskoh Arc of MSZ and Its by Shah and Said

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    Naveed khan
    1. The document discusses the Makran-Khojak-Pishin Flysch zone, which is a continuous zone of flysch and molasse sediments along the continental margin of the Afghan block in southern Eurasia. 2. It describes the three segments - Makran flysch segment from late Cretaceous to recent, Khojak flysch segment from Oligocene to Miocene, and Pashin flysch segment from Oligocene ranging 7-8km thick. 3. The zones represent accretionary wedges, forearc basins, and magmatic arcs that formed due to the subduction of the Eurasian plate beneath the Afghan block in the Makran sub

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    Chagai & Raskoh Arc of MSZ and Its by Shah and Said

    Uploaded by

    Naveed khan
    61 views20 pages
    1. The document discusses the Makran-Khojak-Pishin Flysch zone, which is a continuous zone of flysch and molasse sediments along the continental margin of the Afghan block in southern Eurasia. 2. It describes the three segments - Makran flysch segment from late Cretaceous to recent, Khojak flysch segment from Oligocene to Miocene, and Pashin flysch segment from Oligocene ranging 7-8km thick. 3. The zones represent accretionary wedges, forearc basins, and magmatic arcs that formed due to the subduction of the Eurasian plate beneath the Afghan block in the Makran sub

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    tectonic of pakistan

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    Chagai & Raskoh Arc of MSZ and its by shah and said

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    1. The document discusses the Makran-Khojak-Pishin Flysch zone, which is a continuous zone of flysch and molasse sediments along the continental margin of the Afghan block in southern Eurasia. 2. It describes the three segments - Makran flysch segment from late Cretaceous to recent, Khojak flysch segment from Oligocene to Miocene, and Pashin flysch segment from Oligocene ranging 7-8km thick. 3. The zones represent accretionary wedges, forearc basins, and magmatic arcs that formed due to the subduction of the Eurasian plate beneath the Afghan block in the Makran sub

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    61 views20 pages

    Chagai & Raskoh Arc of MSZ and Its by Shah and Said

    Uploaded by

    Naveed khan
    1. The document discusses the Makran-Khojak-Pishin Flysch zone, which is a continuous zone of flysch and molasse sediments along the continental margin of the Afghan block in southern Eurasia. 2. It describes the three segments - Makran flysch segment from late Cretaceous to recent, Khojak flysch segment from Oligocene to Miocene, and Pashin flysch segment from Oligocene ranging 7-8km thick. 3. The zones represent accretionary wedges, forearc basins, and magmatic arcs that formed due to the subduction of the Eurasian plate beneath the Afghan block in the Makran sub

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 20

    Makran, khojak,& pashin flysch

    sediments
    \

    Presented to : Sir Mukhtar Akhunzada


    Presented by : Shah Fahad&Salman
    DEPARTMENT OF GEOLOGY ABDUL WALI KKHN
    UNIVERSITY MARDAN
    Subduction Zone
    Plates
    Convergence
    Introduction to MSZ:
     Tectonic Framework :
    Subduction products:

    South to North extension

    1. Accretionary wedges
    2. Fore Arc basin
    3. Raskoh Fore Arc ridge
    4. Dalbandin trough
    5. Chagai magmatic arc
    Raskoh Fore arc geanticline:

     Tectonic framework:
     Tectonic evolution:
     General Geology:
     Consist of RFA Geanticline and RFA flysch sediments
    Lt. Cretaceous ---> Volcano clasts accumulation.
    Limestone strata of Humai e Mashu Khel basin.
    flysch sediments belts strata is of upper most late cretaceous.
    Introduction to MSZ:
     Tectonic Framework :
    Chagai Magmatic arc (CMA):

     Tectonic framework:
     Tectonic evolution:
     General Geology:
     Consist of CMA Geanticline and CMA flysch sediments.
     Andestic volcanics of pre-Maastrichtian (latest cretaceous) age.
     To south humai formation developed, the deposits of conglomerates
    containing pebbeles of granitic rocks from the chagai hills that dip
    southward to Dalbandin trough.
    Introduction to MSZ:
     Tectonic Framework :
    Makran- khojak-pishin Flysch zone:

    Introduction:
     The zone is part of continental margin of the afghan block in the southern part
    of Eurasian plate.
     It is a continuous zone of sediments mostly of geosynclinals flysch nature.
     And molasse sediments.
     It is divided into three segments characterized by different tectonic styles the
    Makran, khojak and pishin.
    Makran Flysch segment:

    TECTONIC FRAMEWORK:
     The Makran flysch sediment is separated in the west by Oman line from the oil producing
    area zargos region in Iran.
     From Oman line it is stretches east ward toward northward trending Chaman, ghazaband and
    Ornach nal faults.
     The north bordered by Raskoh geanticline.
    AGE:
     The age of makran flysch sediment is from late cretaceous in north to recent to gulf of Oman.

    GEOLOGY
     Exposure of Mesozoic and Paleogene sediment including Eocene reefoid limestone
     Highly disturbed rocks
    SATELLITE IMAGE
    Khojak Flysch zone:
    TECTONIC FRAMEORK:
     The structure of makran flysch sediments gradually change from east trending to
    north trending of the khojik flysch segment.
     It is extended between the Chaman fault in the west and the ghazaband fault in
    the east.

    AGE:
     Its age is oligocene to Miocene.
     The khojak flysch sediment can be followed for 300km to the north.

    GEOLOGY:
     There is gradually loses its tight and imbricate structure giving way to the fold
    and nappe structure of pishin structure.
    SATELLITE IMAGE
    Pashin Flysch zone:

    TECTONIC FRAMEWORK:
     The khojak flysch segment northeast ward bent to pashin flysch zone.
     The tight and imbricate sediment is changed into intact fold.
     The pashin is wedge between Kabul block of the Eurasian plate in the north and bela
    – Waziristan ophiolite zone in the south
     Finally terminate at sarobi fault.
     Most part in Afghanistan territory.

    AGE:
     Its age is oligocene.

    THICKNESS:
     Its thickness is ranging between 7km to 8km.
    GEOLOGY
     The Pishin flysch segment contains sediments ranging from Paleocene
    through Pliocene.
     In Pakistan north of zhob valley the oldest rock exposed belong to Nisai
    formation.
     Nisai formation:(reefoid limestone, shale, sandstone & conglomerate)
     Murgha faqirzai formation
     Shaigula sandstone:( interbedded sandstone & shale)
     Bostan formation:( clay, silt, conglomerate & thin bedded sandstone)
     Katawaz basin
     Thickness 7000 to 8000m.
    MAP

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