干旱区生态环境知识资源中心(Arid): Geochemical characteristics and geological significance of humid climate events in the Middle-Late Triassic (Ladinian-Carnian) of the Ordos Basin, central China

Arid

DOI	10.1016/j.marpetgeo.2021.105179
	Geochemical characteristics and geological significance of humid climate events in the Middle-Late Triassic (Ladinian-Carnian) of the Ordos Basin, central China
	Zhang, Kun; Liu, Rong; Liu, Zhaojun; Li, Li
通讯作者	Liu, R (corresponding author), Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China.
来源期刊	MARINE AND PETROLEUM GEOLOGY
ISSN	0264-8172
EISSN	1873-4073
出版年	2021
卷号	131
英文摘要	Many Middle-Late Triassic (Ladinian-Carnian) global and local humid climate events that impacted on global palaeontological evolution and mineral distribution have been recorded in the rocks. The lacustrine sedimentary sequence of the Yanchang Formation in the Ordos Basin in the northeastern Tethys region may be an important example of control by global humid climate events. As revealed by an established chronostratigraphic framework and the study of organic carbon isotopes, elemental geochemistry and clay minerals, the Chang 7 Member of the Yanchang Formation was deposited in the Ladinian-Carnian, and the high total organic carbon (TOC) and total nitrogen (TN) contents indicate the high productivity of the ancient lake. The observed elemental ratios (Sr/Cu, Rb/Sr and Al2O3/MgO) and high contents of mixed-layer smectite indicate humid climate events in the Chang 73 and Chang 71 members. The increases in weathering degree, surface temperature and terrigenous clastic material input indicate enhancement of the hydrological cycle driven by a warm-humid climate. The arid-wet transitions, the negative excursions of the studied organic carbon isotope and the temperature fluctuations during the deposition of the Chang 73 and Chang 71 members of the Yanchang Formation are consistent with the Carnian humid event (CHE) and Ladinian-Carnian humid interval (L-CHI). The palaeontological diversity and the development of organic shales, turbidity currents and sandy debris flows in the Chang 7 Member may represent the continental sedimentary responses to coeval global humid climate events. The isochronous eruptions of volcanoes around the Ordos Basin may have intensified the global greenhouse effect and become an important factor driving the multi-stage humid climate events in the Ordos Basin.
英文关键词	Organic carbon isotopes Elemental geochemistry Climate humid event Continental response Ladinian-carnian Ordos basin
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000671183700001
WOS关键词	SEDIMENTARY ORGANIC-MATTER ; BLACK SHALE DEPOSITION ; CHANG 7 MEMBER ; YANCHANG FORMATION ; CARBON-ISOTOPE ; PLUVIAL EPISODE ; LAKE-SEDIMENTS ; YANGTZE BLOCK ; SOUTHERN ALPS ; APPALACHIAN BASIN
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368501
作者单位	[Zhang, Kun; Liu, Rong; Liu, Zhaojun] Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China; [Zhang, Kun; Liu, Rong; Liu, Zhaojun] Key Lab Oil Shale & Coexistent Energy Minerals Ji, Changchun 130061, Peoples R China; [Liu, Rong; Liu, Zhaojun] Jilin Univ, Minist Educ, Key Lab Evolut Life & Environm Northeast Asia, Changchun 130026, Peoples R China; [Li, Li] Macquarie Univ, MQ Marine Res Ctr, Dept Earth & Planetary Sci, Sydney, NSW 2109, Australia
推荐引用方式 GB/T 7714	Zhang, Kun,Liu, Rong,Liu, Zhaojun,et al. Geochemical characteristics and geological significance of humid climate events in the Middle-Late Triassic (Ladinian-Carnian) of the Ordos Basin, central China[J],2021,131.
APA	Zhang, Kun,Liu, Rong,Liu, Zhaojun,&Li, Li.(2021).Geochemical characteristics and geological significance of humid climate events in the Middle-Late Triassic (Ladinian-Carnian) of the Ordos Basin, central China.MARINE AND PETROLEUM GEOLOGY,131.
MLA	Zhang, Kun,et al."Geochemical characteristics and geological significance of humid climate events in the Middle-Late Triassic (Ladinian-Carnian) of the Ordos Basin, central China".MARINE AND PETROLEUM GEOLOGY 131(2021).