气候变化领域集成服务门户(CCPortal): South Georgia microcontinent: Displaced fragment of the southernmost Andes

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DOI	10.1016/j.earscirev.2021.103671
	South Georgia microcontinent: Displaced fragment of the southernmost Andes
	Dalziel I.W.D.; Macdonald D.I.M.; Stone P.; Storey B.C.
发表日期	2021
ISSN	0012-8336
卷号	220
英文摘要	The mountainous, glaciated island of South Georgia is the crest of one of the most isolated fragments of continental crust on Earth. It is located approximately 1700 km east of the southern termination of the Andean Cordillera of South America. The island is primarily composed of Lower Cretaceous turbidites, the infill of a marginal basin floored by stretched continental and ophiolitic crust. Remnants of a volcanic arc are preserved on offshore islands to the southwest. The Pacific hinterland of the southernmost Andes is missing in Tierra del Fuego, terminating at a submarine escarpment forming the continental margin immediately east of Cape Horn. The arc and back-arc basin infill rocks of South Georgia correspond exactly to part of the missing Cordilleran hinterland. The mechanism of transport of the South Georgia microcontinent eastward relative to South America remains obscure, but likely involved some form of ‘escape tectonics’ during mid- to Late Cretaceous counterclockwise rotation of the arc that led to closure and inversion of the marginal basin. © 2021 Elsevier B.V.
英文关键词	Andes; North Scotia Ridge; Scotia Arc; South Georgia; Tierra del Fuego
语种	英语
scopus关键词	continental crust; Cretaceous; displacement; marginal basin; tectonic rotation; turbidite; volcanic arc; Andes; Antarctica; Scotia Arc; Tierra del Fuego [(ISG) South America]
来源期刊	EARTH-SCIENCE REVIEWS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/209265
作者单位	Institute for Geophysics, Jackson School of Geosciences, The University of Texas, JJ Pickle Research Campus, 10100 Burnet Road (Bldg. 196, ROC), Austin, TX 78758, United States; School of Geosciences, University of Aberdeen, King's College, Aberdeen, Scotland AB24 3FX, United Kingdom; British Geological Survey, The Lyell Centre, Edinburgh, Scotland EH14 4AP, United Kingdom; Gateway Antarctica, College of Science, University of Canterbury, Private Bag 4800, Christchurch, 8140, New Zealand
推荐引用方式 GB/T 7714	Dalziel I.W.D.,Macdonald D.I.M.,Stone P.,et al. South Georgia microcontinent: Displaced fragment of the southernmost Andes[J],2021,220.
APA	Dalziel I.W.D.,Macdonald D.I.M.,Stone P.,&Storey B.C..(2021).South Georgia microcontinent: Displaced fragment of the southernmost Andes.EARTH-SCIENCE REVIEWS,220.
MLA	Dalziel I.W.D.,et al."South Georgia microcontinent: Displaced fragment of the southernmost Andes".EARTH-SCIENCE REVIEWS 220(2021).