气候变化领域集成服务门户(CCPortal): Geologic evolution of Northern Tibet: Results of an expedition to Ulugh Muztagh

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DOI	10.1126/science.235.4786.299
	Geologic evolution of Northern Tibet: Results of an expedition to Ulugh Muztagh
	Molnar P.; Burchfiel B.C.; Ziyun Z.; K'uangyi L.; Shuji W.A.G.; Minmin H.
发表日期	1987
ISSN	0036-8075
起始页码	299
结束页码	305
卷号	235 期号:4786
英文摘要	A reconnaissance expedition across the northern margin of the Tibetan plateau revealed evidence of a late Cenozoic northward progression of the locus of crustal shortening and, therefore, of a northward growth ofthe area encompassed by the plateau. Active reverse faults crop out at the foot of the Altyn Tagh, on the northern edge of the plateau, and at the bases of several ranges within the Altyn Tagh and Kunlun, where the elevations of the neighboring basins are less than 4000 meters. Farther south, where elevations are higher, there was no evidence of recent faulting, but late Cenozoic rock in the Ayak Kum Kol basin has been strongly folded. South of this basin, Ulugh Muztagh, apparently the highest mountain in the eastern Kunlun, is underlain by late Miocene, tourmaline-bearing and two-mica granite. These rocks suggest that thickening of continental crust had begun in this area by late Miocene time. Overlying quartz-sanidine welded tuffs of Pliocene age imply that uplift and erosion occurred between Miocene and Pliocene time, but with little subsequent erosion. In addition, we found an eastwest trending belt of mafic and ultramafic rock that probably marks a suture of a crustal fragment with southern Asia in Triassic or more recent time.
英文关键词	MAPS AND MAPPING; Petrology; Rock; Geology
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244798
作者单位	Department of Earth, Atmospheric, and Planetary Science, Massachuses Institute of Technology, Cambridge, MA 02139, United States; Regional Geologic Surveying Team, Xinjiang Provincial Bureau of Geology, Qitai Xinjiang, China; Institute of Geography of Academia Sinica, Urumqi Xinjiang, China
推荐引用方式 GB/T 7714	Molnar P.,Burchfiel B.C.,Ziyun Z.,et al. Geologic evolution of Northern Tibet: Results of an expedition to Ulugh Muztagh[J],1987,235(4786).
APA	Molnar P.,Burchfiel B.C.,Ziyun Z.,K'uangyi L.,Shuji W.A.G.,&Minmin H..(1987).Geologic evolution of Northern Tibet: Results of an expedition to Ulugh Muztagh.Science,235(4786).
MLA	Molnar P.,et al."Geologic evolution of Northern Tibet: Results of an expedition to Ulugh Muztagh".Science 235.4786(1987).