Terre Adelie revisited (East Antarctica): Evidence for a Proterozoic tectonic ''collage''

被引：0
|
作者：
Monnier, O
Menot, RP
Peucat, JJ
Fanning, M
Giret, A
机构：
[1] UNIV RENNES 1, CNRS URA 4661, INST GEOL, F-35042 RENNES, FRANCE
[2] AUSTRALIAN NATL UNIV, RES SCH EARTH SCI, CANBERRA, ACT 0200, AUSTRALIA
来源：
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE A-SCIENCES DE LA TERRE ET DES PLANETES | 1996年 / 322卷 / 01期
关键词：
East Antarctica; Terre Adelie; precambrian; metamorphism; U/Pb datings on single zircons; terranes;
D O I：
暂无
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Two distinct mesozonal lithotectonic units are defined in Terre Adelie: a western metasedimentary migmatitic unit formed during a Palaeoproterozoic thermal and tectonic event, and an eastern meta-igneous unit, which underwent a longer evolution, starting during late Archean times. These units were tectonically joined between 1.7 and 1.5 Ga (basement cratonization). No Pan-African imprint was detected. The previous regional syntheses may be questioned as they assumed a major Late Archean granulite event and the extension of a Pan-African prograde metamorphic gradient.
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收藏
页码：55 / 62
页数：8
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