干旱区生态环境知识资源中心(Arid): Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy

Arid

DOI	10.1016/j.palaeo.2021.110744
	Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy
	Dai, Xianduo; Du, Yuansheng; Ziegler, Martin; Wang, Chaowen; Ma, Qianli; Chai, Rong; Guo, Hua
通讯作者	Du, YS (corresponding author), China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China.
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2022
卷号	585
英文摘要	The early Mesozoic greenhouse period was characterized by variable climate conditions. The driving mechanisms of this long-term variability are unclear due to a lack of full-period climate reconstructions. In particular, reconstructions of the terrestrial environment are rare, especially reconstructions representing South China during the early Mesozoic period. We focused on the major, trace and rare earth element compositions and clay mineralogy of 173 mudstones from the northern margin of the South China Plate. These data were used as proxies to evaluate the weathering intensity and reconstruct the climate variability from the Middle Triassic to the Late Jurassic after considering the potential effects of provenance, diagenesis and sedimentary sorting and recycling. From the latest part of the Triassic to the early Middle Jurassic, five well-correlated chemical weathering indices, the chemical index of alteration (CIA), chemical index of weathering (CIW), plagioclase index of alteration (PIA), sodium depletion index (tau Na) and weathering index of Parker (WIP), imply an advanced degree of chemical weathering (e.g., CIAcorr, the corrected CIA, ranging from 71.1 to 88.0) and a clay mineral assemblage zone with abundant kaolinite. Together, these findings indicate a dominant humid climate. In the pre-Late Triassic and post-Middle Jurassic, the dominant seasonally arid climate was characterized by low and widely variable chemical weathering index values (e.g., CIAcorr values of 59.4-85.4) and clay mineral assemblage zones containing chlorite, smectite and mixed-layer illite-smectite but less kaolinite. We suggest that PCO2 variations, the megamonsoon effect, plate motion and regional topography all contributed to the observed climate changes during the early Mesozoic.
英文关键词	Mesozoic Zigui Basin Dangyang Basin Mudrock The chemical index of alteration
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000727262400001
WOS关键词	SEA-SURFACE TEMPERATURES ; TRUE POLAR WANDER ; SICHUAN BASIN ; ELEMENT GEOCHEMISTRY ; TIBETAN PLATEAU ; YANGTZE BLOCK ; QAIDAM BASIN ; ANOXIC EVENT ; LAKE SYSTEM ; SEDIMENTARY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/374406
作者单位	[Dai, Xianduo; Du, Yuansheng; Ma, Qianli; Chai, Rong; Guo, Hua] China Univ Geosci, Sch Earth Sci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China; [Ziegler, Martin] Univ Utrecht, Fac Geosci, Dept Earth Sci, NL-3584 CB Utrecht, Netherlands; [Wang, Chaowen] China Univ Geosci, Gemol Inst, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Dai, Xianduo,Du, Yuansheng,Ziegler, Martin,et al. Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy[J],2022,585.
APA	Dai, Xianduo.,Du, Yuansheng.,Ziegler, Martin.,Wang, Chaowen.,Ma, Qianli.,...&Guo, Hua.(2022).Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,585.
MLA	Dai, Xianduo,et al."Middle Triassic to Late Jurassic climate change on the northern margin of the South China Plate: Insights from chemical weathering indices and clay mineralogy".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 585(2022).