First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam

This paper represents the first integrated research on the mineralogical, geochemical and stable isotope characteristics of the Upper Triassic high‑sulfur coals from the Khanh Hoa open-pit mine, Thai Nguyen Coalfield, NE Vietnam. Formed in a marine-influenced carbonate succession, the Khanh Hoa coal...

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Autores: Li, Jing, Wang, Yuan, Nguyen, Xuanphu, Zhuang, Xinguo, Li, Jiancheng, Querol, Xavier, Li, Baoqing, Moreno, Natalia, Hoang, Vanlong, Córdoba, Patricia, Do, Vanthuat
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2022
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/280833
Acceso en línea:http://hdl.handle.net/10261/280833
https://api.elsevier.com/content/abstract/scopus_id/85137630659
Access Level:acceso abierto
Palabra clave:Upper Triassic
Carbon and nitrogen isotopes
High‑sulfur coals
Hydrothermal activity
Mo-U-Cs-Sb enrichment
Thai Nguyen Coalfield
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spelling First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE VietnamLi, JingWang, YuanNguyen, XuanphuZhuang, XinguoLi, JianchengQuerol, XavierLi, BaoqingMoreno, NataliaHoang, VanlongCórdoba, PatriciaDo, VanthuatUpper TriassicCarbon and nitrogen isotopesHigh‑sulfur coalsHydrothermal activityMo-U-Cs-Sb enrichmentThai Nguyen CoalfieldThis paper represents the first integrated research on the mineralogical, geochemical and stable isotope characteristics of the Upper Triassic high‑sulfur coals from the Khanh Hoa open-pit mine, Thai Nguyen Coalfield, NE Vietnam. Formed in a marine-influenced carbonate succession, the Khanh Hoa coal is characterized by medium ash yield, low volatile matter yield, and high sulfur content. Minerals in the Khanh Hoa coal are predominantly composed of authigenic calcite in the upper portion; and pyrite, quartz, with minor amounts of tobelite ([(NH4), K] (Si, Al)4Al2O10(OH)2), gypsum in the middle and lower portions. The high‑sulfur Khanh Hoa coal is enriched in an As-Mo-Sb-U-Cs-P assemblage, which presents both an organic and inorganic mode of occurrence, and is largely ascribed to hydrothermal fluids. The δ13C values of the Khanh Hoa coal range from −24.77‰ to −22.80‰ (avg. −23.33‰), reflecting a change in sedimentation pattern (from transgressive to high stand system upwards). The δ15N values of the Khanh Hoa coal range from 2.41‰ to 3.73‰ (avg. 3.30‰), possibly resulted from influenced by seawater influence and a redox environment. The mineralogical, geochemical and isotopic characteristics reflected that the high‑sulfur Khanh Hoa coal was formed/preserved in marine-influenced anoxic environment, with low detrital input, and strong activities of multi-stage hydrothermal solutions.This research was supported by the National Key Research and Development Program of China (No. 2021YFC2902000), the National Natural Science Foundation of China (Nos. 41972179, 41972180), the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (No. CUGCJ1819), and the Key Project of Coal-based Low-carbon Joint Research Foundation of NSFC and Shanxi Province (No. U1910204). The authors express great gratitude to the editor and anonymous reviewers for their comments, which greatly improved the manuscript quality.Peer reviewedElsevierConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202220222022info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Postprintinfo:eu-repo/semantics/acceptedVersionhttp://hdl.handle.net/10261/280833https://api.elsevier.com/content/abstract/scopus_id/85137630659reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)InglésInternational Journal of Coal Geologyhttps://doi.org/10.1016/j.coal.2022.104097Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2808332026-05-22T06:33:51Z
dc.title.none.fl_str_mv First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
title First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
spellingShingle First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
Li, Jing
Upper Triassic
Carbon and nitrogen isotopes
High‑sulfur coals
Hydrothermal activity
Mo-U-Cs-Sb enrichment
Thai Nguyen Coalfield
title_short First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
title_full First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
title_fullStr First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
title_full_unstemmed First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
title_sort First insights into mineralogy, geochemistry, and isotopic signatures of the Upper Triassic high‑sulfur coals from the Thai Nguyen Coal field, NE Vietnam
dc.creator.none.fl_str_mv Li, Jing
Wang, Yuan
Nguyen, Xuanphu
Zhuang, Xinguo
Li, Jiancheng
Querol, Xavier
Li, Baoqing
Moreno, Natalia
Hoang, Vanlong
Córdoba, Patricia
Do, Vanthuat
author Li, Jing
author_facet Li, Jing
Wang, Yuan
Nguyen, Xuanphu
Zhuang, Xinguo
Li, Jiancheng
Querol, Xavier
Li, Baoqing
Moreno, Natalia
Hoang, Vanlong
Córdoba, Patricia
Do, Vanthuat
author_role author
author2 Wang, Yuan
Nguyen, Xuanphu
Zhuang, Xinguo
Li, Jiancheng
Querol, Xavier
Li, Baoqing
Moreno, Natalia
Hoang, Vanlong
Córdoba, Patricia
Do, Vanthuat
author2_role author
author
author
author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv Upper Triassic
Carbon and nitrogen isotopes
High‑sulfur coals
Hydrothermal activity
Mo-U-Cs-Sb enrichment
Thai Nguyen Coalfield
topic Upper Triassic
Carbon and nitrogen isotopes
High‑sulfur coals
Hydrothermal activity
Mo-U-Cs-Sb enrichment
Thai Nguyen Coalfield
description This paper represents the first integrated research on the mineralogical, geochemical and stable isotope characteristics of the Upper Triassic high‑sulfur coals from the Khanh Hoa open-pit mine, Thai Nguyen Coalfield, NE Vietnam. Formed in a marine-influenced carbonate succession, the Khanh Hoa coal is characterized by medium ash yield, low volatile matter yield, and high sulfur content. Minerals in the Khanh Hoa coal are predominantly composed of authigenic calcite in the upper portion; and pyrite, quartz, with minor amounts of tobelite ([(NH4), K] (Si, Al)4Al2O10(OH)2), gypsum in the middle and lower portions. The high‑sulfur Khanh Hoa coal is enriched in an As-Mo-Sb-U-Cs-P assemblage, which presents both an organic and inorganic mode of occurrence, and is largely ascribed to hydrothermal fluids. The δ13C values of the Khanh Hoa coal range from −24.77‰ to −22.80‰ (avg. −23.33‰), reflecting a change in sedimentation pattern (from transgressive to high stand system upwards). The δ15N values of the Khanh Hoa coal range from 2.41‰ to 3.73‰ (avg. 3.30‰), possibly resulted from influenced by seawater influence and a redox environment. The mineralogical, geochemical and isotopic characteristics reflected that the high‑sulfur Khanh Hoa coal was formed/preserved in marine-influenced anoxic environment, with low detrital input, and strong activities of multi-stage hydrothermal solutions.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Postprint
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/280833
https://api.elsevier.com/content/abstract/scopus_id/85137630659
url http://hdl.handle.net/10261/280833
https://api.elsevier.com/content/abstract/scopus_id/85137630659
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv International Journal of Coal Geology
https://doi.org/10.1016/j.coal.2022.104097
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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