Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering

Aimal K. Kasi; Aktar Muhammad Kassi; Henrik Friis; Muhammad Umar; Mohibulla Mohibulla; Muhammad Ishaq Kakar

Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering

Aimal K. Kasi
, Aktar Muhammad Kassi
, Henrik Friis
, Muhammad Umar
, Mohibulla Mohibulla
, Muhammad Ishaq Kakar

Department of Geoscience

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

Abstract

Petrology and geochemistry of sandstones and mudstones of the Miocene Dasht Murgha Group (DMG) and Pliocene Malthanai Formation (MF) of the Pishin Belt (Katawaz Basin), northwestern Pakistan have been carried out to find out their provenance and source area weathering. Sandstones of the Dasht Murgha Group and Malthanai Formation are lithic to sublith- arenites, rich in quartz, and metamorphic and sedimentary lithic fragments, indicating a recycled orogenic source. LmLvLsplots show that the Dasht Murgha Group is rich in sedimentary and metamorphic lithic fragments (Lm35Lvl 8Ls4 7), while samples of the Malthanai Formation are overwhelmingly rich in sedimentary fragments (Lm14Lv10Ls76). Eocene Nisai Formation and Oligocene Khojak Formation within the Pishin Belt were mainly providing the sedimentary/metasedimentary detritus. High content of monocrystalline quartz (DMG: 28.21 %; MF: 30.7), and higher i02/A1203 ratios in sandstones (DMG: 9.86; MF: 11.98) also indicate high maturity of sandstones due to recycling of source terrain in collision orogens. High Cr/Ni (DMG: 5.23; MF: 6.17) and moderate CrN (DMG: 3.96; MF: 3.88) ratios suggest significant contributions from mafic and ultramafic detritus derived from Muslim Bagh-Zhob Ophiolite. Malthanai Formation has higher CIA and CIW values (68.96 and 77 .53) than Dasht Murgha Group ( 63. 87 & 70.93 ); however, they both indicate low to moderate weathering intensities. Dasht Murgha group and Malthanai Formation have higher ICY values which indicate abundance of aluminous silicates, hence, showing moderate weathering of the source area. In A-CN-K diagrams the samples make linear trend towards illite which suggests that the sediments were derived from a tectonically active source going through non-steady-state weathering, where the detritus has been derived from different zones of weathering profiles.

Original language	English
Publication date	31 Aug 2016
Number of pages	1
Publication status	Published - 31 Aug 2016
Event	International Conference on Earth Sciences Pakistan - baragali Summer Campus, University of Peshawar, Peshawar, Pakistan Duration: 15 Jul 2016 → 17 Jul 2016

Conference

Conference	International Conference on Earth Sciences Pakistan
Location	baragali Summer Campus, University of Peshawar
Country/Territory	Pakistan
City	Peshawar
Period	15/07/2016 → 17/07/2016

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http://nceg.uop.edu.pk/GeologicalBulletin/ESP-2016AbstractVolume/abstracts69.pdf

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Kasi, A. K., Kassi, A. M., Friis, H., Umar, M., Mohibulla, M., & Kakar, M. I. (2016). Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering. Abstract from International Conference on Earth Sciences Pakistan, Peshawar, Pakistan. http://nceg.uop.edu.pk/GeologicalBulletin/ESP-2016AbstractVolume/abstracts69.pdf

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title = "Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering",

abstract = " Petrology and geochemistry of sandstones and mudstones of the Miocene Dasht Murgha Group (DMG) and Pliocene Malthanai Formation (MF) of the Pishin Belt (Katawaz Basin), northwestern Pakistan have been carried out to find out their provenance and source area weathering. Sandstones of the Dasht Murgha Group and Malthanai Formation are lithic to sublith- arenites, rich in quartz, and metamorphic and sedimentary lithic fragments, indicating a recycled orogenic source. LmLvLsplots show that the Dasht Murgha Group is rich in sedimentary and metamorphic lithic fragments (Lm35Lvl 8Ls4 7), while samples of the Malthanai Formation are overwhelmingly rich in sedimentary fragments (Lm14Lv10Ls76). Eocene Nisai Formation and Oligocene Khojak Formation within the Pishin Belt were mainly providing the sedimentary/metasedimentary detritus. High content of monocrystalline quartz (DMG: 28.21 \%; MF: 30.7), and higher i02/A1203 ratios in sandstones (DMG: 9.86; MF: 11.98) also indicate high maturity of sandstones due to recycling of source terrain in collision orogens. High Cr/Ni (DMG: 5.23; MF: 6.17) and moderate CrN (DMG: 3.96; MF: 3.88) ratios suggest significant contributions from mafic and ultramafic detritus derived from Muslim Bagh-Zhob Ophiolite. Malthanai Formation has higher CIA and CIW values (68.96 and 77 .53) than Dasht Murgha Group ( 63. 87 \& 70.93 ); however, they both indicate low to moderate weathering intensities. Dasht Murgha group and Malthanai Formation have higher ICY values which indicate abundance of aluminous silicates, hence, showing moderate weathering of the source area. In A-CN-K diagrams the samples make linear trend towards illite which suggests that the sediments were derived from a tectonically active source going through non-steady-state weathering, where the detritus has been derived from different zones of weathering profiles.",

author = "Kasi, \{Aimal K.\} and Kassi, \{Aktar Muhammad\} and Henrik Friis and Muhammad Umar and Mohibulla Mohibulla and Kakar, \{Muhammad Ishaq\}",

year = "2016",

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day = "31",

language = "English",

note = "International Conference on Earth Sciences Pakistan ; Conference date: 15-07-2016 Through 17-07-2016",

}

Kasi, AK, Kassi, AM, Friis, H, Umar, M, Mohibulla, M & Kakar, MI 2016, 'Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering', International Conference on Earth Sciences Pakistan, Peshawar, Pakistan, 15/07/2016 - 17/07/2016. <http://nceg.uop.edu.pk/GeologicalBulletin/ESP-2016AbstractVolume/abstracts69.pdf>

Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering. / Kasi, Aimal K.; Kassi, Aktar Muhammad; Friis, Henrik et al.
2016. Abstract from International Conference on Earth Sciences Pakistan, Peshawar, Pakistan.

Research output: Contribution to conference › Conference abstract for conference › Research › peer-review

TY - ABST

T1 - Petrology and geochemistry of the Miocene-Pliocene fluvial succession, Katawaz Basin, Western Pakistan: Implications on provenance and source area weathering

AU - Kasi, Aimal K.

AU - Kassi, Aktar Muhammad

AU - Friis, Henrik

AU - Umar, Muhammad

AU - Mohibulla, Mohibulla

AU - Kakar, Muhammad Ishaq

PY - 2016/8/31

Y1 - 2016/8/31

N2 - Petrology and geochemistry of sandstones and mudstones of the Miocene Dasht Murgha Group (DMG) and Pliocene Malthanai Formation (MF) of the Pishin Belt (Katawaz Basin), northwestern Pakistan have been carried out to find out their provenance and source area weathering. Sandstones of the Dasht Murgha Group and Malthanai Formation are lithic to sublith- arenites, rich in quartz, and metamorphic and sedimentary lithic fragments, indicating a recycled orogenic source. LmLvLsplots show that the Dasht Murgha Group is rich in sedimentary and metamorphic lithic fragments (Lm35Lvl 8Ls4 7), while samples of the Malthanai Formation are overwhelmingly rich in sedimentary fragments (Lm14Lv10Ls76). Eocene Nisai Formation and Oligocene Khojak Formation within the Pishin Belt were mainly providing the sedimentary/metasedimentary detritus. High content of monocrystalline quartz (DMG: 28.21 %; MF: 30.7), and higher i02/A1203 ratios in sandstones (DMG: 9.86; MF: 11.98) also indicate high maturity of sandstones due to recycling of source terrain in collision orogens. High Cr/Ni (DMG: 5.23; MF: 6.17) and moderate CrN (DMG: 3.96; MF: 3.88) ratios suggest significant contributions from mafic and ultramafic detritus derived from Muslim Bagh-Zhob Ophiolite. Malthanai Formation has higher CIA and CIW values (68.96 and 77 .53) than Dasht Murgha Group ( 63. 87 & 70.93 ); however, they both indicate low to moderate weathering intensities. Dasht Murgha group and Malthanai Formation have higher ICY values which indicate abundance of aluminous silicates, hence, showing moderate weathering of the source area. In A-CN-K diagrams the samples make linear trend towards illite which suggests that the sediments were derived from a tectonically active source going through non-steady-state weathering, where the detritus has been derived from different zones of weathering profiles.

AB - Petrology and geochemistry of sandstones and mudstones of the Miocene Dasht Murgha Group (DMG) and Pliocene Malthanai Formation (MF) of the Pishin Belt (Katawaz Basin), northwestern Pakistan have been carried out to find out their provenance and source area weathering. Sandstones of the Dasht Murgha Group and Malthanai Formation are lithic to sublith- arenites, rich in quartz, and metamorphic and sedimentary lithic fragments, indicating a recycled orogenic source. LmLvLsplots show that the Dasht Murgha Group is rich in sedimentary and metamorphic lithic fragments (Lm35Lvl 8Ls4 7), while samples of the Malthanai Formation are overwhelmingly rich in sedimentary fragments (Lm14Lv10Ls76). Eocene Nisai Formation and Oligocene Khojak Formation within the Pishin Belt were mainly providing the sedimentary/metasedimentary detritus. High content of monocrystalline quartz (DMG: 28.21 %; MF: 30.7), and higher i02/A1203 ratios in sandstones (DMG: 9.86; MF: 11.98) also indicate high maturity of sandstones due to recycling of source terrain in collision orogens. High Cr/Ni (DMG: 5.23; MF: 6.17) and moderate CrN (DMG: 3.96; MF: 3.88) ratios suggest significant contributions from mafic and ultramafic detritus derived from Muslim Bagh-Zhob Ophiolite. Malthanai Formation has higher CIA and CIW values (68.96 and 77 .53) than Dasht Murgha Group ( 63. 87 & 70.93 ); however, they both indicate low to moderate weathering intensities. Dasht Murgha group and Malthanai Formation have higher ICY values which indicate abundance of aluminous silicates, hence, showing moderate weathering of the source area. In A-CN-K diagrams the samples make linear trend towards illite which suggests that the sediments were derived from a tectonically active source going through non-steady-state weathering, where the detritus has been derived from different zones of weathering profiles.

M3 - Conference abstract for conference

T2 - International Conference on Earth Sciences Pakistan

Y2 - 15 July 2016 through 17 July 2016

ER -