Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China

Datong Basin is a platform uplift formed in the Cenozoic era and has a significant coal-bearing geological unit in China. Tashan Mine is located in the middle-eastern part of the Datong Basin, the coal resources of the Taiyuan Formation are abundant, and the research value is enormous. Of the coal r...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Duan Hongyue, Xie Weidong, Zhao Jianguang, Jia Tengfei
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	sequence stratigraphy coal accumulation model taiyuan formation tashan mine Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/88448e0a05a140eea178fa826f69b05c
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:88448e0a05a140eea178fa826f69b05c
record_format	dspace
spelling	oai:doaj.org-article:88448e0a05a140eea178fa826f69b05c2021-12-05T14:10:49ZSequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China2391-544710.1515/geo-2020-0303https://doaj.org/article/88448e0a05a140eea178fa826f69b05c2021-10-01T00:00:00Zhttps://doi.org/10.1515/geo-2020-0303https://doaj.org/toc/2391-5447Datong Basin is a platform uplift formed in the Cenozoic era and has a significant coal-bearing geological unit in China. Tashan Mine is located in the middle-eastern part of the Datong Basin, the coal resources of the Taiyuan Formation are abundant, and the research value is enormous. Of the coal resources, coal seams 3–5 and 8 are the main. The lack of research in sequence stratigraphy, coal-forming environment, coal-accumulating model limits the layout efficiency of working face and the exploration and development efficiency of coal measures associated resources. This study used sedimentary and sequence stratigraphy and calculated and measured field drilling data to investigate the sequence stratigraphic characteristics, paleogeographic pattern, and coal accumulation model of the Taiyuan Formation. The sequence boundary and system tract boundary were identified, and the Taiyuan Formation was divided into four third-order sequences. The paleogeographic pattern was reconstructed with the third-order sequence as a unit by applying the single-factor analysis and multifactor comprehensive mapping. Additionally, the distribution characteristics of the main coal seams were clarified, and the corresponding coal accumulation model was reconstructed. The results exhibit that the sedimentary facies transformed from carbonate platform–tidal flat–lagoon–shallow water delta facies to shallow water delta facies from SQ1 to SQ2, coal seam 8 formed in interdistributary bay microfacies and peat swamp microfacies in SQ1. Transgression further expanded in SQ3, and the sedimentary facies were still dominated by the shallow water delta facies. Coal seams 3–5 are formed in distributary channel microfacies, which consist of interdistributary bay microfacies and peat swamp microfacies. The paleogeographic pattern was still dominated by shallow water delta in SQ4, in which interdistributary depressions and peat swamp microfacies widely developed. The thickness of coal seams 3–5 is in the range of 2.40–25.90 m, in which the northwestern study area is characterized by moderate water depth and sufficient fine sediment, and the widely developed distributary bay and peat swamp deposited a thick coal seam. The thickness of coal seam 8 is in the range of 0.5–10.5 m, and the thickness is stable (mostly thicker than 6 m) controlled by the widely developed lagoon, mud flat, and peat swamp microfacies and reduction water environment.Duan HongyueXie WeidongZhao JianguangJia TengfeiDe Gruyterarticlesequence stratigraphycoal accumulation modeltaiyuan formationtashan mineGeologyQE1-996.5ENOpen Geosciences, Vol 13, Iss 1, Pp 1259-1272 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	sequence stratigraphy coal accumulation model taiyuan formation tashan mine Geology QE1-996.5
spellingShingle	sequence stratigraphy coal accumulation model taiyuan formation tashan mine Geology QE1-996.5 Duan Hongyue Xie Weidong Zhao Jianguang Jia Tengfei Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
description	Datong Basin is a platform uplift formed in the Cenozoic era and has a significant coal-bearing geological unit in China. Tashan Mine is located in the middle-eastern part of the Datong Basin, the coal resources of the Taiyuan Formation are abundant, and the research value is enormous. Of the coal resources, coal seams 3–5 and 8 are the main. The lack of research in sequence stratigraphy, coal-forming environment, coal-accumulating model limits the layout efficiency of working face and the exploration and development efficiency of coal measures associated resources. This study used sedimentary and sequence stratigraphy and calculated and measured field drilling data to investigate the sequence stratigraphic characteristics, paleogeographic pattern, and coal accumulation model of the Taiyuan Formation. The sequence boundary and system tract boundary were identified, and the Taiyuan Formation was divided into four third-order sequences. The paleogeographic pattern was reconstructed with the third-order sequence as a unit by applying the single-factor analysis and multifactor comprehensive mapping. Additionally, the distribution characteristics of the main coal seams were clarified, and the corresponding coal accumulation model was reconstructed. The results exhibit that the sedimentary facies transformed from carbonate platform–tidal flat–lagoon–shallow water delta facies to shallow water delta facies from SQ1 to SQ2, coal seam 8 formed in interdistributary bay microfacies and peat swamp microfacies in SQ1. Transgression further expanded in SQ3, and the sedimentary facies were still dominated by the shallow water delta facies. Coal seams 3–5 are formed in distributary channel microfacies, which consist of interdistributary bay microfacies and peat swamp microfacies. The paleogeographic pattern was still dominated by shallow water delta in SQ4, in which interdistributary depressions and peat swamp microfacies widely developed. The thickness of coal seams 3–5 is in the range of 2.40–25.90 m, in which the northwestern study area is characterized by moderate water depth and sufficient fine sediment, and the widely developed distributary bay and peat swamp deposited a thick coal seam. The thickness of coal seam 8 is in the range of 0.5–10.5 m, and the thickness is stable (mostly thicker than 6 m) controlled by the widely developed lagoon, mud flat, and peat swamp microfacies and reduction water environment.
format	article
author	Duan Hongyue Xie Weidong Zhao Jianguang Jia Tengfei
author_facet	Duan Hongyue Xie Weidong Zhao Jianguang Jia Tengfei
author_sort	Duan Hongyue
title	Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
title_short	Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
title_full	Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
title_fullStr	Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
title_full_unstemmed	Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China
title_sort	sequence stratigraphy and coal accumulation model of the taiyuan formation in the tashan mine, datong basin, china
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/88448e0a05a140eea178fa826f69b05c
work_keys_str_mv	AT duanhongyue sequencestratigraphyandcoalaccumulationmodelofthetaiyuanformationinthetashanminedatongbasinchina AT xieweidong sequencestratigraphyandcoalaccumulationmodelofthetaiyuanformationinthetashanminedatongbasinchina AT zhaojianguang sequencestratigraphyandcoalaccumulationmodelofthetaiyuanformationinthetashanminedatongbasinchina AT jiatengfei sequencestratigraphyandcoalaccumulationmodelofthetaiyuanformationinthetashanminedatongbasinchina
_version_	1718371676048064512

Sequence stratigraphy and coal accumulation model of the Taiyuan Formation in the Tashan Mine, Datong Basin, China

Ejemplares similares