The stratigraphy of the southern Pab Range, Pakistan

White, H.J. Osborne

doi:10.31274/rtd-180813-5705

Cited by 3 publications

(5 citation statements)

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“…The formation is exposed in different parts of the K-SFTB with a thickness range from a few meters to hundreds of meters. In the type section 478 m thickness has been recorded and further southward from the type section in the Jakkher Pass the formation is 498 m thick, whereas in the Sulaiman Belt its maximum thickness is 1524 m (31,32). The Pab Sandstone is dominantly composed of thick-bedded to massive sandstone with subordinate mudstones, shales, conglomerates and marls in some areas (32,33,9,10) Medium to coarse grained sandstone is well sorted, and thick J. mt.…”

Section: Stratigraphymentioning

confidence: 96%

Petrology and Geochemistry of the Late Cretaceous Pab Formation, Western Sulaiman Fold- Thrust- Belt, Pakistan: Implications for Provenance and Paleo-Weathering

et al. 2021

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Late Cretaceous sandstone succession of the Pab Formation in western Sulaiman Fold Thrust belt Pakistan was investigated for petrology and bulk rock chemistry to determine its source terrain, paleo-weathering and tectonic setting. The formation is mainly comprised of sandstone with reddish to maroon color shale and arenaceous limestone. Texturally, the sandstone is fine to coarse grained, sub-angular to well-rounded and moderately to well sorted. The sandstone is petrologically and geochemically classified as quartz arenite to sub lithic arenite. The detritus was mainly derived from plutonic acidic source. QtFL and QmFLt suggests that recycled orogeny and Craton Interior setting were major sources of sediments. Geochemical models support that the detritus was derived from quartzose sedimentary source terrain, suggest deposition in a passive continental margin setting. Average values of chemical indices are CIA 59% CIW 67% and CIV 12.70%, which suggest moderate to high degree of chemical weathering in source area, that may reﬂect humid climate condition in the source area. The petrographic study and geochemical models demonstrate that the Pab Formation is mostly composed of mature sandstone from acidic plutonic and low-grade metamorphic rocks terrain in recycled and Craton Interior setting deposited on western passive margin of Indian plate in Tethys Ocean.

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Section: Stratigraphymentioning

confidence: 96%

Petrology and Geochemistry of the Late Cretaceous Pab Formation, Western Sulaiman Fold- Thrust- Belt, Pakistan: Implications for Provenance and Paleo-Weathering

et al. 2021

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“…This complex is one portion of the basement of southern Indus Basin of Pakistan, which is overlain unconformably by Cretaceous, Tertiary and Quaternary sedimentary sequences. The Cretaceous rocks consist of Pab Formation were deposited in a marine shelf to shallow marine environment (A. S. Khan, Kelling, Umar, & Kassi, 2002; Shah, 2009; White, 1981). Continental flood basalts and shallow marine to fluvial deposits of Ranikot Group (Khaskeli Basalts, Khadro, Bara and Lakhra formations) were developed during the Paleogene (Agheem, Solangi, Hakro, Mastoi, & Siddiqui, 2011; A. Hakro & Baig, 2013; A.…”

Section: Regional Geologymentioning

confidence: 99%

“…A. A. D. Hakro, Khokhar, Solangi, Bhutto, & Khokhar, 2016; Khokhar, Hakro, Solangi, Brohi, & Markhand, 2014; Mahmud & Sheikh, 2009; Shah, 2009; White, 1981; Wnuk, Fariduddin, Fatmi, & Filipo, 1991; Wnuk, SanFilipo, Fatmi, & Fariduddin, 1991). Neogene sedimentary rocks in the southern Indus Basin, Pakistan consist of shallow marine to fluvial deposits of Gaj and Siwalik groups (Shah, 2009).…”

Section: Regional Geologymentioning

confidence: 99%

Grain size analysis of the Oligocene Nari Formation sandstone in the Laki Range, southern Indus Basin, Pakistan: Implications for depositional setting

et al. 2021

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This study investigates the depositional setting of the Oligocene sedimentary rocks of the southern Indus Basin according to grain size analysis of sandstones. Twelve sandstone samples were collected and studied from the Oligocene Nari Formation that distributes along the N‐S‐trending Laki Range in the Kirthar Province of Pakistan. The analysis results specify very fine to fine‐grained sediments and unimodal nature of grain size distribution. The sorting values of the studied sandstones vary from 0.66φ to 0.90φ, which indicates that the sediments are moderately to moderately well‐sorted. The skewness values of investigated samples vary from −0.04φ to 0.25φ, which indicate nearly symmetrical to fine‐skewed nature. The kurtosis of the studied samples varies between 0.73φ and 1.44φ which shows platykurtic, mesokurtic, and leptokurtic nature. Linear discriminant function and interpretation diagrams of sediments demonstrate that the Oligocene Nari Formation sediments from Lal Bagh section were being transported as bedload and suspended load with a bimodal to unimodal depositional mode that were deposited in a fluvial to shallow marine deltaic environment of a passive margin.

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“…Amphibolites, granites, rhyolites, and basic dykes of Precambrian age are the western extension of the Indian shield rocks (Jan, Laghari, & Khan, ). The rocks of Cretaceous age are represented by the Mughalkot and Pab sandstones of marine shelf to shallow marine depositional environments (Khan, Kelling, Umar, & Kassi, ; Shah, ; White, ). Paleogene rocks of the southern Indus Basin are shown by Khaskeli Basalt, Khadro, Bara, Lakhra, Laki, Kirther, and Nari formations of continental flood basalts origin, shallow marine inner shelf, fluvio‐deltaic, shallow marine, and marine and fluviatile depositional system (Agheem, Solangi, Hakro, Mastoi, & Siddiqui, ; Hakro & Baig, ; Hakro & Baig, ; Hakro, Khokhar, Solangi, Bhutto, & Khokhar, ; Khokhar, Hakro, Solangi, Siddiqui, & Abbasi, ; Mahmud & Sheikh, ; Shah, ; White, ; Wnuk, SanFilipo, Fatmi, & Fariduddin, ).…”

Section: Regional Geologymentioning

confidence: 99%

“…shelf, fluvio-deltaic, shallow marine, and marine and fluviatile depositional system (Agheem, Solangi, Hakro, Mastoi, & Siddiqui, 2011;Hakro & Baig, 2013;Hakro & Baig, 2014;Hakro, Khokhar, Solangi, Bhutto, & Khokhar, 2016;Khokhar, Hakro, Solangi, Siddiqui, & Abbasi, 2016;Mahmud & Sheikh, 2009;Shah, 2009;White, 1981;. Neogene sedimentary rocks are denoted by two rock units (Gaj Formation and Siwalik Group) of marine and fluviatile depositional environment (Shah, 2009).…”

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confidence: 99%

Provenance and tectonic setting of Early Eocene Sohnari Member of Laki Formation from southern Indus Basin of Pakistan

et al. 2017

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The current study is carried out the bulk mineralogical and geochemical investigation of the Early Eocene Sohnari coal‐bearing sedimentary rocks from the southern Indus Basin in Pakistan. The sediments of the Sohnari Member of Laki Formation are composed of shale and sandstone. Their provenance and tectonic setting can well constrain the evolution of the Indus Basin and help solve the controversy regarding the timing of the India–Eurasia collision. X‐ray diffraction results confirm the existence of abundant quartz, zircon, and hematite. The assemblages of hematite, calcite, halite, and gypsum indicate the depositional history of Early Eocene time of southern Indus Basin had with dry, low temperature, and high salinity conditions. The geochemical results demonstrate that the Sohnari sediments are dominated by mature sublitharenites derived predominantly from quartz sedimentary and felsic rocks with minor arc‐related mafic inputs. The chemical index of alteration and plagioclase index of alteration of the Sohnari Member indicate the sediments experienced low to high weathering conditions in the southern Indus Basin during Early Eocene time. The provenance characteristics suggest that the Early Eocene sediments were deposited in a passive margin, instead of a foreland basin. Therefore, we propose that India might still have not collided with Eurasia in the Ypresian of Early Eocene (56–47.8 Ma).

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The stratigraphy of the southern Pab Range, Pakistan

Cited by 3 publications

References 0 publications

Petrology and Geochemistry of the Late Cretaceous Pab Formation, Western Sulaiman Fold- Thrust- Belt, Pakistan: Implications for Provenance and Paleo-Weathering

Petrology and Geochemistry of the Late Cretaceous Pab Formation, Western Sulaiman Fold- Thrust- Belt, Pakistan: Implications for Provenance and Paleo-Weathering

Grain size analysis of the Oligocene Nari Formation sandstone in the Laki Range, southern Indus Basin, Pakistan: Implications for depositional setting

Provenance and tectonic setting of Early Eocene Sohnari Member of Laki Formation from southern Indus Basin of Pakistan

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