TERRE ADELIE REVISITED (EAST ANTARCTICA) - EVIDENCE FOR A PROTEROZOICTECTONIC COLLAGE

Authors
MONNIER O MENOT RP PEUCAT JJ FANNING M GIRET A
Citation
O. Monnier et al., TERRE ADELIE REVISITED (EAST ANTARCTICA) - EVIDENCE FOR A PROTEROZOICTECTONIC COLLAGE, Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes, 322(1), 1996, pp. 55-62
Citations number
21
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Comptes rendus de l'Academie des sciences. Serie II. Sciences de la terre et des planetes → ACNP
ISSN journal
12518050
Volume
322
Issue
1
Year of publication
1996
Pages
55 - 62
Database
ISI
SICI code
1251-8050(1996)322:1<55:TAR(A->2.0.ZU;2-7
Abstract
Two distinct mesozonal lithotectonic units are defined in Terre Adelie : a western metasedimentary migmatitic unit formed during a Palaeoprot erozoic 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 (basemen t cratonization). No Pan-African imprint was detected. The previous re gional syntheses may be questioned as they assumed a major Late Archea n granulite event and the extension of a Pan-African prograde metamorp hic gradient.