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...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/11/11/1230 |
| _version_ | 1797509245323706368 |
|---|---|
| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-03-10T05:14:58Z |
| format | Article |
| id | doaj.art-a3c936f7ed874a97864891fc776bf4bd |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T05:14:58Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-a3c936f7ed874a97864891fc776bf4bd2023-11-23T00:32:14ZengMDPI AGMinerals2075-163X2021-11-011111123010.3390/min11111230Petrological Composition of the Last Coal Seam in the Longmendong Section before the End-Permian Mass ExtinctionChunguang Zhang0Jun Wang1Mingshi Feng2Zhiqiang Shi3Fang Xiang4Mingcai Hou5Shuai Yang6Ben Kneller7Hongde Chen8Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaSchool of Geosciences, University of Aberdeen, Aberdeen AB24 3UE, UKInstitute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, ChinaLate 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.https://www.mdpi.com/2075-163X/11/11/1230coalmaceral compositionwildfirevolcanic activityEmeishan basaltlatest Changhsingian |
| spellingShingle | 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 Minerals coal maceral composition wildfire volcanic activity Emeishan basalt latest Changhsingian |
| title | 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_short | 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 |
| topic | coal maceral composition wildfire volcanic activity Emeishan basalt latest Changhsingian |
| url | https://www.mdpi.com/2075-163X/11/11/1230 |
| 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 |