Madagascar and the amalgamation of Central Gondwana

被引：185
作者：
Collins, Alan S. [1 ]
机构：
[1] Univ Adelaide, Sch Earth & Environm Sci, Continental Evolut Res Grp, Adelaide, SA 5005, Australia
来源：
GONDWANA RESEARCH | 2006年 / 9卷 / 1-2期
关键词：
Madagascar; Gondwana; Azania; tectonics; geochronology;
D O I：
10.1016/j.gr.2005.10.001
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Madagascar lay in an interesting position in Gondwana, straddling one of the largest orogens that formed as the supercontinent amalgamated. The Malagasy basement preserves a record of the timing and style of this amalgamation, and in addition contains much information as to the palaeogeography of the eastern Mozambique Ocean. Madagascar consists of a number of tectonic units that amalgamated in the Ediacaran-Cambrian. The tectonic units are: The Antongil Block; the Antananarivo Block; the Tsaratanana Sheet and the Bemarivo Belt. In addition to these, there are a number of regions dominated by Neoproterozoic metasedimentary rocks, including the Molo, Betsimisaraka, Vohibory and Androyen regions. In this review I outline these units, discuss their amalgamation history and implications for Neoproterozoic-Cambrian palaeogeography, and highlight a few key questions for future study. (c) 2005 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：3 / 16
页数：14
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