Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions
The petrography of 106 clastic rock samples from the Middle Jurassic Dameigou and Shimengou Formations in the Qaidam Basin was analyzed to investigate their provenance and basin evolution. Five distinct sandstone units have been identified from the base of the Dameigou Formation to the top of the Sh...
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Elsevier
2025-06-01
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| Series: | Journal of Asian Earth Sciences: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590056025000064 |
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| author | Kai Zhou Minfang Yang Ran Gao Zhiming Yan Peixin Zhang Wanqing Wang Weichao Wang Lei Wang Longyi Shao Jing Lu |
| author_facet | Kai Zhou Minfang Yang Ran Gao Zhiming Yan Peixin Zhang Wanqing Wang Weichao Wang Lei Wang Longyi Shao Jing Lu |
| author_sort | Kai Zhou |
| collection | DOAJ |
| description | The petrography of 106 clastic rock samples from the Middle Jurassic Dameigou and Shimengou Formations in the Qaidam Basin was analyzed to investigate their provenance and basin evolution. Five distinct sandstone units have been identified from the base of the Dameigou Formation to the top of the Shimengou Formation, hereafter termed as S-I, S-II, S-III, S-IV, and S-V. Petrographic analysis suggests that during the deposition of S-I (Aalenian stage), sediments were sourced from the Qaidam Main Block at the southern margin of the basin and the South Qilian Mountains at the northern margin. However, during the deposition of S-II, S-III, S-IV, and S-V (Bajocian to early Callovian stages), the basin received sediments from the East Kunlun Mountains to the south and the Qilian Mountains to the north. Mineralogical Index of Alteration (MIA) values, along with discrimination diagrams, indicate that the Middle Jurassic climate in the Qaidam Basin transitioned from semi-humid and warm (S-I) to humid and warm (S-II to S-IV), before returning to semi-humid and warm conditions (S-V). A basin evolution model was developed according to our findings, which provide a better understanding in the basin-forming processes and the principle of resource accumulation in the Middle Jurassic. |
| format | Article |
| id | doaj-art-4d3654351b3b4070b67fc4c45d8ce886 |
| institution | OA Journals |
| issn | 2590-0560 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
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| series | Journal of Asian Earth Sciences: X |
| spelling | doaj-art-4d3654351b3b4070b67fc4c45d8ce8862025-08-20T02:06:15ZengElsevierJournal of Asian Earth Sciences: X2590-05602025-06-011310019510.1016/j.jaesx.2025.100195Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditionsKai Zhou0Minfang Yang1Ran Gao2Zhiming Yan3Peixin Zhang4Wanqing Wang5Weichao Wang6Lei Wang7Longyi Shao8Jing Lu9State Key Laboratory of Coal Resources and Safe Mining, and College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaPetroleum Exploration and Development Research Institute, PetroChina, Beijing 100083, ChinaSINOPEC Exploration & Production Research Institute, Beijing 100083, ChinaCollege of Civil Engineering and Transportation, Weifang University, Weifang 261061, ChinaSchool of Municipal and Environmental Engineering, Henan University of Urban Construction, Pingdingshan 467036 Henan, ChinaState Key Laboratory of Coal Resources and Safe Mining, and College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaQinghai Bureau of Coal Geology, China National Administration of Coal Geology, Xining 810001, ChinaPetroChina Coalbed Methane Company Limited, ChinaState Key Laboratory of Coal Resources and Safe Mining, and College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, ChinaState Key Laboratory of Coal Resources and Safe Mining, and College of Geoscience and Surveying Engineering, China University of Mining and Technology, Beijing 100083, China; Corresponding author.The petrography of 106 clastic rock samples from the Middle Jurassic Dameigou and Shimengou Formations in the Qaidam Basin was analyzed to investigate their provenance and basin evolution. Five distinct sandstone units have been identified from the base of the Dameigou Formation to the top of the Shimengou Formation, hereafter termed as S-I, S-II, S-III, S-IV, and S-V. Petrographic analysis suggests that during the deposition of S-I (Aalenian stage), sediments were sourced from the Qaidam Main Block at the southern margin of the basin and the South Qilian Mountains at the northern margin. However, during the deposition of S-II, S-III, S-IV, and S-V (Bajocian to early Callovian stages), the basin received sediments from the East Kunlun Mountains to the south and the Qilian Mountains to the north. Mineralogical Index of Alteration (MIA) values, along with discrimination diagrams, indicate that the Middle Jurassic climate in the Qaidam Basin transitioned from semi-humid and warm (S-I) to humid and warm (S-II to S-IV), before returning to semi-humid and warm conditions (S-V). A basin evolution model was developed according to our findings, which provide a better understanding in the basin-forming processes and the principle of resource accumulation in the Middle Jurassic.http://www.sciencedirect.com/science/article/pii/S2590056025000064ProvenanceModal analysisBasin evolutionMiddle JurassicQaidam Basin |
| spellingShingle | Kai Zhou Minfang Yang Ran Gao Zhiming Yan Peixin Zhang Wanqing Wang Weichao Wang Lei Wang Longyi Shao Jing Lu Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions Journal of Asian Earth Sciences: X Provenance Modal analysis Basin evolution Middle Jurassic Qaidam Basin |
| title | Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions |
| title_full | Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions |
| title_fullStr | Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions |
| title_full_unstemmed | Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions |
| title_short | Provenance of Middle Jurassic sandstones from the Yuqia depression in the northern Qiadam Basin (NW China): Implications for basin evolution and paleoclimatic conditions |
| title_sort | provenance of middle jurassic sandstones from the yuqia depression in the northern qiadam basin nw china implications for basin evolution and paleoclimatic conditions |
| topic | Provenance Modal analysis Basin evolution Middle Jurassic Qaidam Basin |
| url | http://www.sciencedirect.com/science/article/pii/S2590056025000064 |
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