气候变化领域集成服务门户(CCPortal): Tectonic and climate forcing of exhumation in the SE Tibetan Plateau over the past 7 Ma: Insights from the deltaic-submarine fan system in the Andaman Sea, northeastern Indian Ocean

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DOI	10.1016/j.palaeo.2023.111573
	Tectonic and climate forcing of exhumation in the SE Tibetan Plateau over the past 7 Ma: Insights from the deltaic-submarine fan system in the Andaman Sea, northeastern Indian Ocean
	Zhang, Peng; Jiang, Shao-Yong; Li, Renyuan; Mei, Lianfu
发表日期	2023
ISSN	0031-0182
EISSN	1872-616X
卷号	620
英文摘要	The Tibetan Plateau and its adjacent areas are a typical example for studying the relationship between plateau uplift, climate change, and surface erosion. It has been argued that the South Asian monsoon (SAM) strengthened significantly at 10-8 Ma, whereas others suggested that the SAM weakened at that time. Here we report a large deltaic-submarine fan system in the Andaman Sea with a high sediment accumulation rate during the Pliocene. We propose that the formation of the deltaic-submarine fan was a result of climate and tectonics over the past 7 Myr. Our findings are based on multi-method provenance analyses (heavy minerals, bulk-rock geochemistry, detrital zircon U-Pb ages, and seismic data) of the Late Miocene-Pleistocene deltaic-submarine fan system. The analyses, in combination with those of the modern river sediments and potential source regions, suggest that the Upper Miocene sediments were mainly derived from the eastern Lhasa Terrane and northern West Burma Terrane (Upper Salween and Upper Irrawaddy, respectively), whereas the Pliocene-Pleistocene deposits were primarily derived from the eastern Lhasa Terrane, northern West Burma Terrane, and Tengchong Terrane (Lower Salween River), with small inputs from the Sibumasu and Baoshan terranes. We propose a modified scenario in which the Salween initiated in the early Late Miocene (10 Ma) and the Irrawaddy developed a modern geometrical morphology after the Pliocene. These two large rivers transported eroded materials from the SE Tibetan Plateau into the Andaman Sea and formed the deltaic-submarine fan. The high sediment accumulation rate (>530 m/ Myr) in the Pliocene is consistent with the strengthened SAM and heterogeneous crustal deformation of the SE Tibetan Plateau during the same interval. We conclude that both the climate and tectonics have direct effects on exhumation of the SE Tibetan Plateau over the past Late Miocene-Quaternary.
关键词	SE Tibetan Plateau Palaeodrainage evolution Climate change South Asian monsoon Andaman Sea Exhumation
英文关键词	ZIRCON U-PB; SW CHINA IMPLICATIONS; DETRITAL-ZIRCON; INDO-CHINA; SOUTHERN TIBET; EARLY MIOCENE; HF ISOTOPES; CENTRAL MYANMAR; FORE-ARC; PROVENANCE ANALYSIS
WOS研究方向	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:001041225400001
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/283893
作者单位	China University of Geosciences - Wuhan; China University of Geosciences - Wuhan; China University of Geosciences - Wuhan; China National Offshore Oil Corporation (CNOOC)
推荐引用方式 GB/T 7714	Zhang, Peng,Jiang, Shao-Yong,Li, Renyuan,et al. Tectonic and climate forcing of exhumation in the SE Tibetan Plateau over the past 7 Ma: Insights from the deltaic-submarine fan system in the Andaman Sea, northeastern Indian Ocean[J],2023,620.
APA	Zhang, Peng,Jiang, Shao-Yong,Li, Renyuan,&Mei, Lianfu.(2023).Tectonic and climate forcing of exhumation in the SE Tibetan Plateau over the past 7 Ma: Insights from the deltaic-submarine fan system in the Andaman Sea, northeastern Indian Ocean.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,620.
MLA	Zhang, Peng,et al."Tectonic and climate forcing of exhumation in the SE Tibetan Plateau over the past 7 Ma: Insights from the deltaic-submarine fan system in the Andaman Sea, northeastern Indian Ocean".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 620(2023).