Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China

In the Carboniferous–Permian period, several organic-rich black shales were deposited in a marine–continental transitional environment in the Linfen area on the eastern margin of the Ordos Basin. Integrated sedimentological and organic geochemical analyses are performed on an outcrop in order to cla...

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Autores principales:	Leifu Zhang, Qun Zhao, Sizhong Peng, Zhen Qiu, Congjun Feng, Qin Zhang, Yuman Wang, Dazhong Dong, Shangwen Zhou
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	marine–continental transitional facies geochemical characterization organic matter accumulation eastern Ordos Basin Technology T
Acceso en línea:	https://doaj.org/article/443b63ad09fc40f488690019b6d7ec3d
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id	oai:doaj.org-article:443b63ad09fc40f488690019b6d7ec3d
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spelling	oai:doaj.org-article:443b63ad09fc40f488690019b6d7ec3d2021-11-11T16:09:46ZPaleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China10.3390/en142174451996-1073https://doaj.org/article/443b63ad09fc40f488690019b6d7ec3d2021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/7445https://doaj.org/toc/1996-1073In the Carboniferous–Permian period, several organic-rich black shales were deposited in a marine–continental transitional environment in the Linfen area on the eastern margin of the Ordos Basin. Integrated sedimentological and organic geochemical analyses are performed on an outcrop in order to clarify the relationship between paleoenvironment and organic matter accumulation. The results of this study show that the marine–continental transitional strata of the Upper Carboniferous Benxi Formation to Lower Permian Taiyuan and Shanxi Formation exposed in the Linfen area are composed of sandstone, shale, coal, and limestone. Total organic carbon (TOC) contents of the studied samples were mainly distributed in the range of 0.59%–35.4%, with an average of 7.32%. From Benxi Formation to Shanxi formation, the humidity gradually increased, and the climate gradually changed from hot and humid to warm and humid during Carboniferous to Permian. The deposition of the Shanxi Formation ended with the climate returning to hot and humid, having an oxic-suboxic conditions and a high paleoproductivity. Paleoredox conditions and paleoproductivity are the two vital factors controlling the formation of organic matter in black shales. The transitional environment characterized by oxic-suboxic, relatively high deposition rate, and various source of organic matter, although different from the marine environment, provides a good material basis for the deposition of organic-rich shales.Leifu ZhangQun ZhaoSizhong PengZhen QiuCongjun FengQin ZhangYuman WangDazhong DongShangwen ZhouMDPI AGarticlemarine–continental transitional faciesgeochemical characterizationorganic matter accumulationeastern Ordos BasinTechnologyTENEnergies, Vol 14, Iss 7445, p 7445 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	marine–continental transitional facies geochemical characterization organic matter accumulation eastern Ordos Basin Technology T
spellingShingle	marine–continental transitional facies geochemical characterization organic matter accumulation eastern Ordos Basin Technology T Leifu Zhang Qun Zhao Sizhong Peng Zhen Qiu Congjun Feng Qin Zhang Yuman Wang Dazhong Dong Shangwen Zhou Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
description	In the Carboniferous–Permian period, several organic-rich black shales were deposited in a marine–continental transitional environment in the Linfen area on the eastern margin of the Ordos Basin. Integrated sedimentological and organic geochemical analyses are performed on an outcrop in order to clarify the relationship between paleoenvironment and organic matter accumulation. The results of this study show that the marine–continental transitional strata of the Upper Carboniferous Benxi Formation to Lower Permian Taiyuan and Shanxi Formation exposed in the Linfen area are composed of sandstone, shale, coal, and limestone. Total organic carbon (TOC) contents of the studied samples were mainly distributed in the range of 0.59%–35.4%, with an average of 7.32%. From Benxi Formation to Shanxi formation, the humidity gradually increased, and the climate gradually changed from hot and humid to warm and humid during Carboniferous to Permian. The deposition of the Shanxi Formation ended with the climate returning to hot and humid, having an oxic-suboxic conditions and a high paleoproductivity. Paleoredox conditions and paleoproductivity are the two vital factors controlling the formation of organic matter in black shales. The transitional environment characterized by oxic-suboxic, relatively high deposition rate, and various source of organic matter, although different from the marine environment, provides a good material basis for the deposition of organic-rich shales.
format	article
author	Leifu Zhang Qun Zhao Sizhong Peng Zhen Qiu Congjun Feng Qin Zhang Yuman Wang Dazhong Dong Shangwen Zhou
author_facet	Leifu Zhang Qun Zhao Sizhong Peng Zhen Qiu Congjun Feng Qin Zhang Yuman Wang Dazhong Dong Shangwen Zhou
author_sort	Leifu Zhang
title	Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
title_short	Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
title_full	Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
title_fullStr	Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
title_full_unstemmed	Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China
title_sort	paleoenvironment and organic matter accumulation mechanism of marine–continental transitional shales: outcrop characterizations of the carboniferous–permian strata, ordos basin, north china
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/443b63ad09fc40f488690019b6d7ec3d
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Paleoenvironment and Organic Matter Accumulation Mechanism of Marine–Continental Transitional Shales: Outcrop Characterizations of the Carboniferous–Permian Strata, Ordos Basin, North China

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