气候变化领域集成服务门户(CCPortal): The Middle to Late Cretaceous marine incursion of the Proto-Paratethys Sea and Asian aridification: A case study from the Simao-Khorat salt giant, Southeast Asia

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DOI	10.1016/j.palaeo.2021.110300
	The Middle to Late Cretaceous marine incursion of the Proto-Paratethys Sea and Asian aridification: A case study from the Simao-Khorat salt giant, Southeast Asia
	Wang, Licheng; Zhong, Yisi; Xi, Dangpeng; Hu, Jianfang; Shen, Lijian; Dong, Haowei; Liu, Chenglin; Ding, Lin
通讯作者	Zhong, YS (通讯作者)
发表日期	2021
ISSN	0031-0182
EISSN	1872-616X
卷号	567
英文摘要	Asian aridification during the Cenozoic was strongly related to moisture flux modulated by sea incursion and the retreat fluctuations of the proto-Paratethys Sea via the Westerlies. However, the extents of the sea incursions are poorly constrained, and there is a lack of sedimentary records beyond the Central Asian basins. The Middle to Late Cretaceous Simao Basin and the Khorat Plateau in Southeast Asia contain thick continental sequences of red beds, evaporites, and aeolian deposits, but whether the depositional environment of the evaporites was marine or continental has been hotly debated. In this study, we compiled multiple sedimentology proxies, biomarkers, element geochemistry, and isotopic geochemistry of the fine-grained sediments of the Mohan section in the Simao Basin. Sedimentological analyses show that this section is composed of subtidal flat fine-grained silici-clastic and carbonate rocks and supratidal flat conglomerates and evaporites. The paleosalinity proxies show that the B concentration and B/Ga and Sr-corrected/Ba ratios range from 30.3 to 81.7 ppm, 2.4 to 5.0, and 0.05 to 0.60, respectively, which indicate brackish conditions. The two typical increases in these proxies are consistent with the stratigraphic horizons of the diagnostic marine biomarkers 24-n-propyl- and 24-iso-propylcholestanes, which suggests seawater recharge. The carbonate delta C-13 and delta O-18 values (-4.84 parts per thousand to -1.75 parts per thousand and -8.25 parts per thousand to -3.69 parts per thousand, respectively) and the bulk delta C-13(org) values (-26.5 parts per thousand to -23.22 parts per thousand) also indicate the influence of seawater. We propose that the seawater likely originated from the proto-Paratethys Sea during a marine incursion. We propose for the first time that the proto-Paratethys seawater incursions extended into the Simao Basin and the Khorat Plateau. These results provide a novel paleogeographic configuration for East Asia during the Middle to Late Cretaceous. The retreat of the proto-Paratethys Sea, the northeast Trade Winds, and the tectonic uplift dramatically decreased the moisture and intensified the extreme aridification in the Simao Basin and the Khorat Plateau.
关键词	LACUSTRINE SOURCE ROCKS SONGLIAO BASIN CHINA IMPLICATIONS FLUID INCLUSIONS YUNNAN PROVINCE TIBETAN PLATEAU POTASH DEPOSITS LANPING BASIN GOSAU GROUP EVOLUTION
英文关键词	Evaporite; Environment; Sea fluctuation; Paleoclimate; Southeast Asia
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:000636761000046
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260377
推荐引用方式 GB/T 7714	Wang, Licheng,Zhong, Yisi,Xi, Dangpeng,et al. The Middle to Late Cretaceous marine incursion of the Proto-Paratethys Sea and Asian aridification: A case study from the Simao-Khorat salt giant, Southeast Asia[J]. 中国科学院青藏高原研究所,2021,567.
APA	Wang, Licheng.,Zhong, Yisi.,Xi, Dangpeng.,Hu, Jianfang.,Shen, Lijian.,...&Ding, Lin.(2021).The Middle to Late Cretaceous marine incursion of the Proto-Paratethys Sea and Asian aridification: A case study from the Simao-Khorat salt giant, Southeast Asia.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,567.
MLA	Wang, Licheng,et al."The Middle to Late Cretaceous marine incursion of the Proto-Paratethys Sea and Asian aridification: A case study from the Simao-Khorat salt giant, Southeast Asia".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 567(2021).