Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze

Abstract Control of various factors, including mineral components, primary productivity and redox level, on the total organic carbon (TOC) in the lower Cambrian black shale from southeastern margin of Upper Yangtze (Taozichong, Longbizui and Yanbei areas) is discussed in detail in this article. Mine...

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Autores principales:	Yu-Ying Zhang, Zhi-Liang He, Shu Jiang, Shuang-Fang Lu, Dian-Shi Xiao, Guo-Hui Chen, Jian-Hua Zhao
Formato:	article
Lenguaje:	EN
Publicado:	KeAi Communications Co., Ltd. 2018
Materias:	Upper Yangtze Lower Cambrian Black shale Total organic carbon Science Q Petrology QE420-499
Acceso en línea:	https://doaj.org/article/fcf823d767db4c9fa269150b5e04ce3e
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spelling	oai:doaj.org-article:fcf823d767db4c9fa269150b5e04ce3e2021-12-02T11:35:15ZControls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze10.1007/s12182-018-0262-x1672-51071995-8226https://doaj.org/article/fcf823d767db4c9fa269150b5e04ce3e2018-10-01T00:00:00Zhttp://link.springer.com/article/10.1007/s12182-018-0262-xhttps://doaj.org/toc/1672-5107https://doaj.org/toc/1995-8226Abstract Control of various factors, including mineral components, primary productivity and redox level, on the total organic carbon (TOC) in the lower Cambrian black shale from southeastern margin of Upper Yangtze (Taozichong, Longbizui and Yanbei areas) is discussed in detail in this article. Mineral components in the study strata are dominated by quartz and clay minerals. Quartz in the Niutitang Formation is mainly of biogenic origin, and the content is in positive correlation with TOC, while the content of clay minerals is negatively correlated with TOC. Primary productivity, represented by the content of Mobio (biogenic molybdenum), Babio (biogenic barium) and phosphorus, is positively correlated with TOC. The main alkanes in studied samples are nC18–nC25, and odd–even priority values are closed to 1 (0.73–1.13), which suggest the organic matter source was marine plankton. Element content ratios of U/Th and Ni/Co and compound ratio Pr/Ph indicate dysoxic–anoxic bottom water, with weak positive relative with TOC. In total, three main points can be drawn to explain the relationship between data and the factors affecting organic accumulation: (1) quartz-rich and clay-mineral-poor deep shelf–slope–basin environment was favorable for living organisms; (2) high productivity provided the material foundation for organic generation; (3) the redox conditions impact slightly on the content of organic matter under high productivity and dysoxic–anoxic condition.Yu-Ying ZhangZhi-Liang HeShu JiangShuang-Fang LuDian-Shi XiaoGuo-Hui ChenJian-Hua ZhaoKeAi Communications Co., Ltd.articleUpper YangtzeLower CambrianBlack shaleTotal organic carbonScienceQPetrologyQE420-499ENPetroleum Science, Vol 15, Iss 4, Pp 709-721 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Upper Yangtze Lower Cambrian Black shale Total organic carbon Science Q Petrology QE420-499
spellingShingle	Upper Yangtze Lower Cambrian Black shale Total organic carbon Science Q Petrology QE420-499 Yu-Ying Zhang Zhi-Liang He Shu Jiang Shuang-Fang Lu Dian-Shi Xiao Guo-Hui Chen Jian-Hua Zhao Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
description	Abstract Control of various factors, including mineral components, primary productivity and redox level, on the total organic carbon (TOC) in the lower Cambrian black shale from southeastern margin of Upper Yangtze (Taozichong, Longbizui and Yanbei areas) is discussed in detail in this article. Mineral components in the study strata are dominated by quartz and clay minerals. Quartz in the Niutitang Formation is mainly of biogenic origin, and the content is in positive correlation with TOC, while the content of clay minerals is negatively correlated with TOC. Primary productivity, represented by the content of Mobio (biogenic molybdenum), Babio (biogenic barium) and phosphorus, is positively correlated with TOC. The main alkanes in studied samples are nC18–nC25, and odd–even priority values are closed to 1 (0.73–1.13), which suggest the organic matter source was marine plankton. Element content ratios of U/Th and Ni/Co and compound ratio Pr/Ph indicate dysoxic–anoxic bottom water, with weak positive relative with TOC. In total, three main points can be drawn to explain the relationship between data and the factors affecting organic accumulation: (1) quartz-rich and clay-mineral-poor deep shelf–slope–basin environment was favorable for living organisms; (2) high productivity provided the material foundation for organic generation; (3) the redox conditions impact slightly on the content of organic matter under high productivity and dysoxic–anoxic condition.
format	article
author	Yu-Ying Zhang Zhi-Liang He Shu Jiang Shuang-Fang Lu Dian-Shi Xiao Guo-Hui Chen Jian-Hua Zhao
author_facet	Yu-Ying Zhang Zhi-Liang He Shu Jiang Shuang-Fang Lu Dian-Shi Xiao Guo-Hui Chen Jian-Hua Zhao
author_sort	Yu-Ying Zhang
title	Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
title_short	Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
title_full	Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
title_fullStr	Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
title_full_unstemmed	Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze
title_sort	controls on the organic carbon content of the lower cambrian black shale in the southeastern margin of upper yangtze
publisher	KeAi Communications Co., Ltd.
publishDate	2018
url	https://doaj.org/article/fcf823d767db4c9fa269150b5e04ce3e
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Controls on the organic carbon content of the lower Cambrian black shale in the southeastern margin of Upper Yangtze

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