气候变化领域集成服务门户(CCPortal): Sedimentary record of climate change across the Eocene/Oligocene transition from the Qaidam Basin, northeastern Tibetan Plateau

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DOI	10.1016/j.palaeo.2020.110203
	Sedimentary record of climate change across the Eocene/Oligocene transition from the Qaidam Basin, northeastern Tibetan Plateau
	Wang, Yadong; Yuan, Sihua; Zhang, Tao; Liu, Xiaoyan; Liu, Yongjiang; Miao, Yunfa
通讯作者	Wang, YD (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, 382 Donggang Western Rd, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0031-0182
EISSN	1872-616X
卷号	564
英文摘要	The Eocene/Oligocene transition (EOT) was marked by a major environmental reorganization accompanied by an abrupt shift of the Earth system from greenhouse to icehouse conditions, which is well documented in marine sedimentary records. Although there are an increasing number of terrestrial records documenting this major climatic reorganization, high-resolution sedimentologic and petrographic evidence from terrestrial contexts is sparse, and the processes driving the EOT which affected the formation of continental detrital sediments are unclear. Here we present evidence from lithofacies, lithology, sediment color, and sediment grain size from a section in the northern part of the NE Tibetan Plateau (Tibetan Plateau), which spans the EOT. The results indicate that major changes in the grain size (coarsening), chromaticity a* (redness increasing), thick gypsum layers (disappearance), structural maturity (decreasing roundness and sorting), sediment compositional maturity (increasing content of lithic, feldspar and mafic minerals) of silt and sandstone occurred at similar to 33.8 Ma, which were considered to be a response to the EOT. The synchronous changes in sedimentological and petrological characteristics and weathering proxies in the Qaidam Basin (Qaidam Basin) and neighboring basins suggest that the climate-forced weakening of weathering and erosion may have been the direct cause of those proxy changes the direct cause of those proxy change. Global cooling is speculated to have been the first-order driving factor in regulating climatic evolution and weathering responses in the Qaidam Basin and even the Asian interior at the EOT. A conceptual model is presented which summarizes the mechanisms responsible for the observed changes in sedimentary characteristics across the EOT.
关键词	EOCENE-OLIGOCENE BOUNDARY XINING BASIN GRAIN-SIZE PROVENANCE ANALYSIS CENOZOIC UPLIFT LANZHOU BASIN MIDDLE EOCENE MA ARIDIFICATION CHINA
英文关键词	Terrestrial record; Grain size; Sediment color; Petrography; Hongsanhan section
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000636756800023
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254072
作者单位	[Wang, Yadong; Miao, Yunfa] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, 382 Donggang Western Rd, Lanzhou 730000, Gansu, Peoples R China; [Wang, Yadong; Miao, Yunfa] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Yuan, Sihua; Liu, Xiaoyan] Coll Earth Sci, Inst Disaster Prevent, Sanhe 065201, Peoples R China; [Zhang, Tao] Key Lab Western Chinas Mineral Resources Gansu Pr, Sch Earth Sci, Lanzhou 730000, Peoples R China; [Zhang, Tao] Lanzhou Univ, Lanzhou 730000, Peoples R China; [Liu, Yongjiang] Ocean Univ China, Coll Marine Geosci, Qingdao 266100, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yadong,Yuan, Sihua,Zhang, Tao,et al. Sedimentary record of climate change across the Eocene/Oligocene transition from the Qaidam Basin, northeastern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,564.
APA	Wang, Yadong,Yuan, Sihua,Zhang, Tao,Liu, Xiaoyan,Liu, Yongjiang,&Miao, Yunfa.(2021).Sedimentary record of climate change across the Eocene/Oligocene transition from the Qaidam Basin, northeastern Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,564.
MLA	Wang, Yadong,et al."Sedimentary record of climate change across the Eocene/Oligocene transition from the Qaidam Basin, northeastern Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 564(2021).