气候变化领域集成服务门户(CCPortal): A climate-driven transcontinental drainage system in the southeast Tibetan Plateau during the Early Cretaceous

CCPortal

DOI	10.1016/j.jseaes.2023.105615
	A climate-driven transcontinental drainage system in the southeast Tibetan Plateau during the Early Cretaceous
	Wang, Licheng; Malkowski, Matthew A.; Cai, Fulong; Shen, Lijian; Saboor, Abdus; Liu, Chenglin; Ding, Lin
发表日期	2023
ISSN	1367-9120
EISSN	1878-5786
卷号	248
英文摘要	The evolution of fluvial drainage systems reflects interactions of tectonic uplift and climate change. Many pre-vious studies have emphasized how Cenozoic tectonic uplift of the Tibetan Plateau has driven the reorganization of large-scale rivers. However, Cretaceous fluvial drainage configurations of the region are poorly constrained. In this study, we present a comprehensive provenance dataset of Lower Cretaceous deposits in the Lanping and Simao basins in southeast Tibet based on petrology, detrital zircon U-Pb dating and Lu-Hf isotopes. Our results show that the quartz-rich Cretaceous fluvial deposits yield major detrital age modes in the 2400-2600 Ma, 1700-1900 Ma, 750-1000 Ma, 400-490 Ma, and 200-290 Ma periods, and are mainly recycled from older siliciclastic strata exposed in the Southern Qiangtang terrane, Songpan-Garze terrane, Sichuan Basin, and Kangdian Basement. Zircon age clusters of 150-200 Ma and 200-290 Ma yield mostly negative and slightly positive epsilon Hf(t) values indicating volcanic detritus supplied from the Yidun Arc and Southern Qiangtang magmatic rocks. Lower Cretaceous fluvial units in the Sichuan, Lanping, Simao, Vientiane, Khorat, and Phuquoc basins share similar detrital zircon age spectra, which we interpret as the existence of a unified fluvial drainage system. We thus propose a transcontinental paleo-river with its headwater from the Southern Qiangtang and Songpan-Garze terranes, and northern Sichuan Basin and flow from Lanping and Simao basins to the Khorat Plateau. We suggest that a warm and humid climate, rather than tectonic uplift, drove rapid erosion rates of the source terranes and establishment of the transcontinental river.
关键词	Detrital zircon Provenance Cretaceous Simao Block Tibet Drainage system
英文关键词	U-PB GEOCHRONOLOGY; DETRITAL ZIRCON GEOCHRONOLOGY; MENGYEJING FORMATION; TOPOGRAPHIC GROWTH; CHINA IMPLICATIONS; KHORAT PLATEAU; SIMAO BASIN; SW CHINA; PROVENANCE; RIVER
WOS研究方向	Geosciences, Multidisciplinary
WOS记录号	WOS:000953647200001
来源期刊	JOURNAL OF ASIAN EARTH SCIENCES
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/283408
作者单位	Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; University of Texas System; University of Texas Austin; China Geological Survey; Chinese Academy of Geological Sciences; University of Peshawar; China University of Geosciences - Wuhan
推荐引用方式 GB/T 7714	Wang, Licheng,Malkowski, Matthew A.,Cai, Fulong,et al. A climate-driven transcontinental drainage system in the southeast Tibetan Plateau during the Early Cretaceous[J]. 中国科学院青藏高原研究所,2023,248.
APA	Wang, Licheng.,Malkowski, Matthew A..,Cai, Fulong.,Shen, Lijian.,Saboor, Abdus.,...&Ding, Lin.(2023).A climate-driven transcontinental drainage system in the southeast Tibetan Plateau during the Early Cretaceous.JOURNAL OF ASIAN EARTH SCIENCES,248.
MLA	Wang, Licheng,et al."A climate-driven transcontinental drainage system in the southeast Tibetan Plateau during the Early Cretaceous".JOURNAL OF ASIAN EARTH SCIENCES 248(2023).