The Paleogene record of Himalayan erosion: Bengal Basin, Bangladesh

Najman, Yani; Bickle, M. J.; BouDagher‐Fadel, Marcelle K.; Carter, Andrew; Garzanti, Eduardo; Paul, Maxence; Wijbrans, J. R.; Willett, E.; Oliver, Graham; Parrish, Randall R.; Akhter, S. H.; Allen, R.; Andó, Sergio; Chisty, Emdad; Reisberg, Laurie; Vezzoli, Giovanni

doi:10.1016/j.epsl.2008.04.028

Cited by 162 publications

(157 citation statements)

References 67 publications

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“…The greater homogeneity seen in the Hatia data may reflect more distal deposition, and hence longer transport distance from the same source. The comparisons overall support the proposals by Alam et al (2003) and Najman et al (2008) that the Hatia trough represents an extension of the P2 Sylhet trough, and that the successions are essentially correlative.…”

Section: Paleogeographic Speculationssupporting

confidence: 68%

“…Alam et al (2003) suggested that the stratigraphy and sedimentation pattern of the Hatia trough should be considered separately, and indicated that it received sediments from all three provinces. Najman et al (2008) suggested that the southern part of the Bengal basin could be correlated with P2, based on provenance study of Paleogene sediments from P1 and P2. Consequently, it is crucial to determine the composition of sediments in the Hatia trough, and evaluate if they are geochemically correlative with P2.…”

Section: Roy and Rosermentioning

confidence: 99%

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Geochemistry of Tertiary Sequence in Shahbajpur-1 Well, Hatia Trough, Bengal Basin, Bangladesh: Provenance, Source Weathering and Province Affinity

Roy

Roser

2014

J Life Earth Sci

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Major and trace element compositions of Neogene sandstones and mudrocks from the Shahbajpur-1 (SB-1) well, Hatia trough, Bengal basin, Bangladesh were determined to examine their geochemical characteristics and provenance, in relation to Himalayan uplift, sediment dispersal, and correlation of coeval successions in a basinal context. Major and trace element abundances in the SB-1 succession vary vertically, with SiO 2 content decreasing and Al 2 O 3 increasing from the older (Surma and Tipam Groups) to younger (Dupi Tila Group) sediments. Marked geochemical fractionation between sandstones and mudrocks reflects advanced hydrodynamic sorting, and relative enrichment of several elements (e.g., TiO 2 , Zr, Ce, Th, Cr) suggests sporadic heavy mineral concentration in some sandstones. Major and trace element provenance discriminants indicate a uniform felsic source (Himalayan detritus and recycled sediments) for the entire succession. Values for the Chemical Index of Alteration (CIA) record moderate weathering in the source, and non-steady state conditions produced by Himalayan uplift. Comparison between the Hatia trough samples and coeval Sylhet trough (P2) sediments shows that the more distal SB-1 succession is compositionally more uniform. Strong similarity in geochemical composition between SB-1 and P2 support the hypothesis that the Hatia trough is an extension of P2, fed by the same dispersal system. Key words: Geochemistry, provenance, weathering, sorting, Bengal basin, Bangladesh. mvivsk: GB M ‡elYvq kvnevRcy i-1 (SB-1), nvwZqv Uª vd, e½xq †ewmb, evsjv ‡`k Gi wbIwRb †e ‡jcv_i I K`© g wkjvi cÖ avb I m¦ í cwigv ‡bi †Uª m Dcv`v ‡bi fivmvqwbK ˆewkó¨ Ges Zv ‡`i Drm m¤ú ‡K© aviYv cÖvb Kiv nq Ges Gi m ‡½ wngvj ‡qi ea© bkxjZv, cj ‡ji web¨vm Ges †ewm ‡bi mgmvgwqK wkjv¯- ‡ii m¤úK© wbY© q Kiv n ‡q ‡Q| SB-1 wkjv¯- ‡ii cÖ avb I m¦ í cwigv ‡bi Dcv`vb Gi ch© vßZv Dj− w¤Kfv ‡e wfboe Zvi mv ‡_ SiO 2 Gi cwigvY n« vm Ges Al 2 O 3 e" w×i cÖ eYZv cÖ vPxbZg wkjv¯-i (my igv Ges wUcvg †kª Yx) †_ ‡K bexbZg wkjv¯- ‡i (Wy wc wUjv †kª Yx) †`Lv hvq| †e ‡jcv_i I K`© g wkjvi f-ivmvqwbK web¨¯-Zvq cÖ wZdwjZ nq †h, Dboe ZZi nvB ‡Wª vWvBbvwgK †kª Yx web¨¯-Zv Ges wewfboe Dcv`v ‡bi (TiO 2 , Zr, Ce, Th, Cr) e" w×i cÖ eYZv hv †`Lvq †h, †e ‡jcv_ ‡ii g ‡a¨ wew ¶ßfv ‡e fvix gvwY ‡Ki AvwaK¨| †gRi Ges †Uª m Dcv`vb †`Lvq †h, mg¯-wkjv¯- ‡ii Drm †djwmK (wngvj ‡qi wkjv Ges cỸ© AveZ© b cjj)| †KwgK¨vj AjUv ‡ik ‡bi Bb ‡W· (CIA) Gi cwigvY cÖ gvY K ‡i ga¨g AvenweKvi Mā' Zv Ges Amg my w¯' Z Ae¯' v hvnv wngvj ‡qi D×© ea© bkxjZvi Øviv cwiPvwjZ| Zz jbvgjKfv ‡e nvwZqv Uª v ‡di cjj wm ‡jU Uª vd (P 2 ) Gi cj ‡ji †_ ‡K MVbMZfv ‡e AwaK mgmZ¡ | SB-1 Ges P 2 Gi f-ivmvqwbK MVb cÖ gvY K ‡i †h, nvwZqv Uª vd P 2 Gi ewa© Z Ask hv GKB ai ‡bi cj ‡ji web¨vm Øviv MwVZ|

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Section: Paleogeographic Speculationssupporting

confidence: 68%

Section: Roy and Rosermentioning

confidence: 99%

Geochemistry of Tertiary Sequence in Shahbajpur-1 Well, Hatia Trough, Bengal Basin, Bangladesh: Provenance, Source Weathering and Province Affinity

Roy

Roser

2014

J Life Earth Sci

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“…Mukherjee et al [2] defined the Bengal basin as a peripheral foreland basin formed as a result of the subduction of the Indian plate below the Eurasian and the Burmese plate, causing the advent of the Himalayan orogeny, along with lithospheric flexure due to the load of the overriding thrust sheet. Several other workers defined the Bengal basin as a remnant oceanic basin formed as a result of the closure of the Tethys Sea [1,60,61]. The major provenances of sediments to the Bengal basin also serve as the primary source of arsenic to the basin.…”

Section: Primary Sourcesmentioning

confidence: 99%

A Review of Groundwater Arsenic in the Bengal Basin, Bangladesh and India: from Source to Sink

2015

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The groundwater of the Bengal basin, in Bangladesh and West Bengal state of India, is found to be severely polluted by non-point sourced, geogenic arsenic (As), which has been regarded as the largest public health concern in the human history. The geomorphology and geology of the aquifers play very important role in the three dimensional existence of the As in the groundwater. The provenance of the groundwater As of Bengal basin may be hypothesized to be sourced to the Himalayan orogenic belt, where the contaminant might have originated by deep-seated tectono-magmatism and subsequently introduced to the surficial system by exhumation. Later, sedimentary processes transported the As-laden sediments from the orogenic belt to the peripheral foreland basin of Bengal where, under conducive biogeochemical environment, the As is released from the solid-phase to the circulating groundwater. Ferric hydroxides and pyrite are considered to be the two most important host minerals for As, although clay minerals may also act as important substrates for the sorbed As. The mobilized As then exists in the groundwater until a suitable geochemical sink is available. The mobilization process may be related to reductive-dissolution of metal oxides and hydroxides that exist in the unconsolidated sediments of the Bengal basin. Other mechanisms like pyrite oxidation, redox cycling in surficial soils, and competitive ion exchange are also accepted as potential mechanisms for arsenic mobilization, and multiple processes may simultaneously contribute to the mobilization of As. The processes are significantly complicated by redox disequilibria in the Bengal basin aquifers. These inorganic processes may have been significantly catalyzed and accentuated by microbially mediated activities. The tertiary source of groundwater As is the irrigation return flow from the agricultural fields.

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“…In the Serravallian, plate collisions sealed off the eastern proto-Mediterranean and the connections between the proto-Mediterranean and the proto-Indian Ocean closed (see Fig 7.33) (see Henderson et al, 2008Henderson et al, , 2010Najman et al, 2008Najman et al, , 2010a. Evaporitic deposits formed in the Red Sea, the Mesopotamian basin and along the northern margin of Africa in the Sirt basin (Gvirtzman and Buchbinder, 1978;Rögl and Steininger, 1983;Jolivet et al, 2006).…”

Section: General Characteristics Of the Distribution Of Neogene Largementioning

confidence: 99%

Evolution and Geological Significance of Larger Benthic Foraminifera

2018

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The Paleogene record of Himalayan erosion: Bengal Basin, Bangladesh

Cited by 162 publications

References 67 publications

Geochemistry of Tertiary Sequence in Shahbajpur-1 Well, Hatia Trough, Bengal Basin, Bangladesh: Provenance, Source Weathering and Province Affinity

Geochemistry of Tertiary Sequence in Shahbajpur-1 Well, Hatia Trough, Bengal Basin, Bangladesh: Provenance, Source Weathering and Province Affinity

A Review of Groundwater Arsenic in the Bengal Basin, Bangladesh and India: from Source to Sink

Evolution and Geological Significance of Larger Benthic Foraminifera

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