Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India

Abstract A high bituminous shale horizon from the Gurha mine in the Bikaner sub-basin of the Rajasthan District, NW India, was studied using a collection of geochemical and petrological techniques. This study investigated the nature and environmental conditions of the organic matter and its relation...

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Autores principales:	Alok K. Singh, Mohammed Hail Hakimi, Alok Kumar, Adeeb Ahmed, Nor Syazwani Zainal Abidin, Mostafa Kinawy, Osama El Mahdy, Aref Lashin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/64fad8d0cbb0484182a8698f9f0869e3
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spelling	oai:doaj.org-article:64fad8d0cbb0484182a8698f9f0869e32021-12-02T13:34:09ZGeochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India10.1038/s41598-020-78906-x2045-2322https://doaj.org/article/64fad8d0cbb0484182a8698f9f0869e32020-12-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-78906-xhttps://doaj.org/toc/2045-2322Abstract A high bituminous shale horizon from the Gurha mine in the Bikaner sub-basin of the Rajasthan District, NW India, was studied using a collection of geochemical and petrological techniques. This study investigated the nature and environmental conditions of the organic matter and its relation to the unconventional oil-shale resources of the bituminous shale. The analyzed shales have high total organic carbon and total sulfur contents, suggesting that these shale sediments were deposited in a paralic environment under reducing conditions. The dominant presence of organic matter derived from phytoplankton algae suggests warm climatic marine environment, with little connection to freshwater enhancing the growth of algae and other microorganisms. The analyzed bituminous shales have high aquatic-derived alginite organic matters, with low Pr/Ph, Pr/n-C17, and Ph/n-C18 ratios. It is classified as Type II oil-prone kerogen, consistent with high hydrogen index value. Considering the maturity indicators of geochemical Tmax (< 430 °C) and vitrinite reflectance values less than 0.40%VRo, the analyzed bituminous shale sediments are in an immature stage of the oil window. Therefore, the oil-prone kerogen Type II in the analyzed bituminous shales has not been cracked by thermal alteration to release oil; thus, unconventional heating is recommended for commercial oil generation.Alok K. SinghMohammed Hail HakimiAlok KumarAdeeb AhmedNor Syazwani Zainal AbidinMostafa KinawyOsama El MahdyAref LashinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-19 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Alok K. Singh Mohammed Hail Hakimi Alok Kumar Adeeb Ahmed Nor Syazwani Zainal Abidin Mostafa Kinawy Osama El Mahdy Aref Lashin Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
description	Abstract A high bituminous shale horizon from the Gurha mine in the Bikaner sub-basin of the Rajasthan District, NW India, was studied using a collection of geochemical and petrological techniques. This study investigated the nature and environmental conditions of the organic matter and its relation to the unconventional oil-shale resources of the bituminous shale. The analyzed shales have high total organic carbon and total sulfur contents, suggesting that these shale sediments were deposited in a paralic environment under reducing conditions. The dominant presence of organic matter derived from phytoplankton algae suggests warm climatic marine environment, with little connection to freshwater enhancing the growth of algae and other microorganisms. The analyzed bituminous shales have high aquatic-derived alginite organic matters, with low Pr/Ph, Pr/n-C17, and Ph/n-C18 ratios. It is classified as Type II oil-prone kerogen, consistent with high hydrogen index value. Considering the maturity indicators of geochemical Tmax (< 430 °C) and vitrinite reflectance values less than 0.40%VRo, the analyzed bituminous shale sediments are in an immature stage of the oil window. Therefore, the oil-prone kerogen Type II in the analyzed bituminous shales has not been cracked by thermal alteration to release oil; thus, unconventional heating is recommended for commercial oil generation.
format	article
author	Alok K. Singh Mohammed Hail Hakimi Alok Kumar Adeeb Ahmed Nor Syazwani Zainal Abidin Mostafa Kinawy Osama El Mahdy Aref Lashin
author_facet	Alok K. Singh Mohammed Hail Hakimi Alok Kumar Adeeb Ahmed Nor Syazwani Zainal Abidin Mostafa Kinawy Osama El Mahdy Aref Lashin
author_sort	Alok K. Singh
title	Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
title_short	Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
title_full	Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
title_fullStr	Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
title_full_unstemmed	Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India
title_sort	geochemical and organic petrographic characteristics of high bituminous shales from gurha mine in rajasthan, nw india
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/64fad8d0cbb0484182a8698f9f0869e3
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Geochemical and organic petrographic characteristics of high bituminous shales from Gurha mine in Rajasthan, NW India

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