Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet

This article analyzes the stress fields in the Qaidam Basin since the entire Cenozoic using finite element numerical simulations. The stress fields are investigated by analyzing tectonic joints and the GPS velocity field in the basin. The relationship between the stress field patterns and the tecton...

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Autores principales:	Xu Shiyang, Guo Jianming, Fan Hailong, Liu Xiang
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	qaidam basin paleostress finite element numerical simulation Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/be7429316736481292ed699769bd8ecb
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spelling	oai:doaj.org-article:be7429316736481292ed699769bd8ecb2021-12-05T14:10:48ZCenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet2391-544710.1515/geo-2020-0262https://doaj.org/article/be7429316736481292ed699769bd8ecb2021-07-01T00:00:00Zhttps://doi.org/10.1515/geo-2020-0262https://doaj.org/toc/2391-5447This article analyzes the stress fields in the Qaidam Basin since the entire Cenozoic using finite element numerical simulations. The stress fields are investigated by analyzing tectonic joints and the GPS velocity field in the basin. The relationship between the stress field patterns and the tectonic activity of the basin was discussed. Based on previous research on the uplift of the Tibetan Plateau, five stages of the tectonic evolution of the Qaidam Basin are modeled. The simulation results show that the stress trajectories in the Oligocence and the Pliocene–Quaternary were similar. In the Oligocence, the stress trajectories in the basin changed significantly and were mainly controlled by the compressional stress on the southern boundary in the initial stage. As the compressional stress on the northern boundary of the basin gradually increased, the compressional stress on the southern and northern boundaries had equal effects in the intermediate stage, and the compressional stress on the northern boundary mainly controlled the stress trajectories in the late stage. During the uplift of the Tibetan Plateau, the stress trajectories in the Qaidam Basin experienced an apparent reversal. The stress trajectories of the internal basin rotated clockwise from NE–SW to NW–SE in the Oligocence and which gradually changed to counterclockwise from NW–SE to NE–SW in the Miocene and recovered to clockwise from NE–SW to NW–SE in the Pliocene–Quaternary.Xu ShiyangGuo JianmingFan HailongLiu XiangDe Gruyterarticleqaidam basinpaleostressfinite element numerical simulationGeologyQE1-996.5ENOpen Geosciences, Vol 13, Iss 1, Pp 736-747 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	qaidam basin paleostress finite element numerical simulation Geology QE1-996.5
spellingShingle	qaidam basin paleostress finite element numerical simulation Geology QE1-996.5 Xu Shiyang Guo Jianming Fan Hailong Liu Xiang Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
description	This article analyzes the stress fields in the Qaidam Basin since the entire Cenozoic using finite element numerical simulations. The stress fields are investigated by analyzing tectonic joints and the GPS velocity field in the basin. The relationship between the stress field patterns and the tectonic activity of the basin was discussed. Based on previous research on the uplift of the Tibetan Plateau, five stages of the tectonic evolution of the Qaidam Basin are modeled. The simulation results show that the stress trajectories in the Oligocence and the Pliocene–Quaternary were similar. In the Oligocence, the stress trajectories in the basin changed significantly and were mainly controlled by the compressional stress on the southern boundary in the initial stage. As the compressional stress on the northern boundary of the basin gradually increased, the compressional stress on the southern and northern boundaries had equal effects in the intermediate stage, and the compressional stress on the northern boundary mainly controlled the stress trajectories in the late stage. During the uplift of the Tibetan Plateau, the stress trajectories in the Qaidam Basin experienced an apparent reversal. The stress trajectories of the internal basin rotated clockwise from NE–SW to NW–SE in the Oligocence and which gradually changed to counterclockwise from NW–SE to NE–SW in the Miocene and recovered to clockwise from NE–SW to NW–SE in the Pliocene–Quaternary.
format	article
author	Xu Shiyang Guo Jianming Fan Hailong Liu Xiang
author_facet	Xu Shiyang Guo Jianming Fan Hailong Liu Xiang
author_sort	Xu Shiyang
title	Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
title_short	Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
title_full	Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
title_fullStr	Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
title_full_unstemmed	Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet
title_sort	cenozoic paleostress field of tectonic evolution in qaidam basin, northern tibet
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/be7429316736481292ed699769bd8ecb
work_keys_str_mv	AT xushiyang cenozoicpaleostressfieldoftectonicevolutioninqaidambasinnortherntibet AT guojianming cenozoicpaleostressfieldoftectonicevolutioninqaidambasinnortherntibet AT fanhailong cenozoicpaleostressfieldoftectonicevolutioninqaidambasinnortherntibet AT liuxiang cenozoicpaleostressfieldoftectonicevolutioninqaidambasinnortherntibet
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Cenozoic paleostress field of tectonic evolution in Qaidam Basin, northern Tibet

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