气候变化领域集成服务门户(CCPortal): Late Miocene tectonic forcing of climate transition in the northeastern Tibetan Plateau

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DOI	10.1016/j.palaeo.2024.112225
	Late Miocene tectonic forcing of climate transition in the northeastern Tibetan Plateau
	Luan, Tianxiang; Zhang, Bo; Zhang, Jinjiang; Guo, Lei; Pei, Junling
发表日期	2024
ISSN	0031-0182
EISSN	1872-616X
起始页码	645
卷号	645
英文摘要	Interactions among late Cenozoic global cooling, tectonic activity and regional climate evolution of the northeastern Tibetan Plateau remain elusive. To further understand the relative contributions of global climate change and tectonism, we conducted a comprehensive study of heavy minerals, rock magnetism, and branched glycerol dialkyl glycerol tetraethers (brGDGTs) in late Cenozoic sediments of the Laojunmiao section (ca. 12.7 Ma to 5 Ma) in the Jiuxi Basin. Our results reveal a notable increase in magnetic susceptibility (chi) and saturation isothermal remanent magnetization (SIRM) at 8.5 Ma, aligning with an accelerated decrease in temperature captured by brGDGTs. Combined with heavy mineral analysis, we propose that the profound changes in magnetic parameters and temperature are closely linked to the intensive uplift of the northern Qilian Shan since 8.5 Ma. Furthermore, this ongoing uplift has occurred simultaneously with persistent aridification in the Jiuxi Basin and its adjacent regions. The Qilian Shan might have reached a threshold elevation and began to act as a moisture barrier to northwestward moisture since 8.5 Ma. By synthesizing hydroclimate evolution records from the northeastern Tibetan Plateau, we deduce that changing topography resulting from tectonic uplift may have exerted a significant influence on regulating the moisture distribution in this region during the mid- to late Miocene.
英文关键词	Rock magnetism; Branched glycerol dialkyl glycerol tetraethers; Heavy mineral; Tectonic uplift; Paleoclimate; Northeastern Tibetan Plateau
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:001223896200001
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296488
作者单位	Peking University; China Geological Survey; Institute of Geology, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences; China Geological Survey; Institute of Geomechanics, Chinese Academy of Geological Sciences; Chinese Academy of Geological Sciences; Peking University
推荐引用方式 GB/T 7714	Luan, Tianxiang,Zhang, Bo,Zhang, Jinjiang,et al. Late Miocene tectonic forcing of climate transition in the northeastern Tibetan Plateau[J],2024,645.
APA	Luan, Tianxiang,Zhang, Bo,Zhang, Jinjiang,Guo, Lei,&Pei, Junling.(2024).Late Miocene tectonic forcing of climate transition in the northeastern Tibetan Plateau.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,645.
MLA	Luan, Tianxiang,et al."Late Miocene tectonic forcing of climate transition in the northeastern Tibetan Plateau".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 645(2024).