Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction

Late Permian coal deposits are widely distributed throughout southwestern China. This paper describes the petrological composition of the last coal seam in the Longmendong section of the Emeishan area during the latest Changhsingian (Permian) and records important information regarding the evolution...

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Autores principales:	Chunguang Zhang, Jun Wang, Mingshi Feng, Zhiqiang Shi, Fang Xiang, Mingcai Hou, Shuai Yang, Ben Kneller, Hongde Chen
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coal maceral composition wildfire volcanic activity Emeishan basalt latest Changhsingian Mineralogy QE351-399.2
Acceso en línea:	https://doaj.org/article/a3c936f7ed874a97864891fc776bf4bd
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spelling	oai:doaj.org-article:a3c936f7ed874a97864891fc776bf4bd2021-11-25T18:26:27ZPetrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction10.3390/min111112302075-163Xhttps://doaj.org/article/a3c936f7ed874a97864891fc776bf4bd2021-11-01T00:00:00Zhttps://www.mdpi.com/2075-163X/11/11/1230https://doaj.org/toc/2075-163XLate Permian coal deposits are widely distributed throughout southwestern China. This paper describes the petrological composition of the last coal seam in the Longmendong section of the Emeishan area during the latest Changhsingian (Permian) and records important information regarding the evolution of the mass extinction event that occurred at the end of the Permian. The results show that the dominant coal maceral group is vitrinite, followed by liptinite and inertinite macerals, and the coal minerals include quartz, chamosite and pyrite. The pyrofusinite and carbon microparticles occurrence modes could have been formed during wildfires in the adjacent areas. The β-tridymite occurrence modes and the high proportions and occurrence modes of magmatic quartz indicate that synchronous felsic volcanic activity occurred during the peat mire accumulation period. The chamosite and quartz occurrence modes suggest that they primarily precipitated from Fe-Mg-rich siliceous solutions that was derived from the weathering of nearby Emeishan basalt. The pyritic coal balls occurrence modes in the C1 coal seam are likely the result of coal-forming plants and Fe-Mg-rich siliceous solutions in neutral to weak alkaline conditions during late syngenetic stages or early epigenetic stages within paleomires.Chunguang ZhangJun WangMingshi FengZhiqiang ShiFang XiangMingcai HouShuai YangBen KnellerHongde ChenMDPI AGarticlecoalmaceral compositionwildfirevolcanic activityEmeishan basaltlatest ChanghsingianMineralogyQE351-399.2ENMinerals, Vol 11, Iss 1230, p 1230 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coal maceral composition wildfire volcanic activity Emeishan basalt latest Changhsingian Mineralogy QE351-399.2
spellingShingle	coal maceral composition wildfire volcanic activity Emeishan basalt latest Changhsingian Mineralogy QE351-399.2 Chunguang Zhang Jun Wang Mingshi Feng Zhiqiang Shi Fang Xiang Mingcai Hou Shuai Yang Ben Kneller Hongde Chen Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
description	Late Permian coal deposits are widely distributed throughout southwestern China. This paper describes the petrological composition of the last coal seam in the Longmendong section of the Emeishan area during the latest Changhsingian (Permian) and records important information regarding the evolution of the mass extinction event that occurred at the end of the Permian. The results show that the dominant coal maceral group is vitrinite, followed by liptinite and inertinite macerals, and the coal minerals include quartz, chamosite and pyrite. The pyrofusinite and carbon microparticles occurrence modes could have been formed during wildfires in the adjacent areas. The β-tridymite occurrence modes and the high proportions and occurrence modes of magmatic quartz indicate that synchronous felsic volcanic activity occurred during the peat mire accumulation period. The chamosite and quartz occurrence modes suggest that they primarily precipitated from Fe-Mg-rich siliceous solutions that was derived from the weathering of nearby Emeishan basalt. The pyritic coal balls occurrence modes in the C1 coal seam are likely the result of coal-forming plants and Fe-Mg-rich siliceous solutions in neutral to weak alkaline conditions during late syngenetic stages or early epigenetic stages within paleomires.
format	article
author	Chunguang Zhang Jun Wang Mingshi Feng Zhiqiang Shi Fang Xiang Mingcai Hou Shuai Yang Ben Kneller Hongde Chen
author_facet	Chunguang Zhang Jun Wang Mingshi Feng Zhiqiang Shi Fang Xiang Mingcai Hou Shuai Yang Ben Kneller Hongde Chen
author_sort	Chunguang Zhang
title	Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
title_short	Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
title_full	Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
title_fullStr	Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
title_full_unstemmed	Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction
title_sort	petrological composition of the last coal seam in the longmendong section before the end-permian mass extinction
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a3c936f7ed874a97864891fc776bf4bd
work_keys_str_mv	AT chunguangzhang petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT junwang petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT mingshifeng petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT zhiqiangshi petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT fangxiang petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT mingcaihou petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT shuaiyang petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT benkneller petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction AT hongdechen petrologicalcompositionofthelastcoalseaminthelongmendongsectionbeforetheendpermianmassextinction
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Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass Extinction

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