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  • Eclogite at the Antarctic palaeo-Pacific active margin of Gondwana (Lanterman Range, northern Victoria Land, Antarctica)

Antarctic Science

Table of Contents - 1996 - Volume 8, Issue 03  


Papers—Earth Sciences and Glaciology

Eclogite at the Antarctic palaeo-Pacific active margin of Gondwana (Lanterman Range, northern Victoria Land, Antarctica)

C.A. Ricci a1, F. Talarico a1, R. Palmeri a1, G. Di Vincenzo a1 and P.C. Pertusati a2
a1 Dipartimento Scienze della Terra, via Delle Cerchia 3, 53100 Siena, Italy
a2 Dipartimento Scienze della Terra, via Santa Maria 53, 56100 Pisa, Italy

Article author query
ricci c   [PubMed][Google Scholar] 
talarico f   [PubMed][Google Scholar] 
palmeri r   [PubMed][Google Scholar] 
vincenzo g   [PubMed][Google Scholar] 
pertusati p   [PubMed][Google Scholar] 

Abstract

Well-preserved eclogites were found for the first time in Antarctica, at the Lanterman Range, northern Victoria Land. They are part of a mafic–ultramafic belt that lies between the Wilson Terrane, representing part of the palaeo-Pacific margin of Gondwana, and the Bowers Terrane, a Cambro-Ordovician volcanic are and related sediments, accreted to the margin during the Ross Orogeny. The eclogites formed at temperatures in the range 750–850°C and pressures above 15 kbar and subsequently experienced a decompressional path to low pressure amphibolite facies conditions. The formation and exhumation of eclogites and the attainment of the metamorphic peak in adjacent rock units is consistent with a plate convergent setting model at the palaeo-Pacific margin of Gondwana.

(Received December 15 1995)
(Accepted April 17 1996)


Key Words: Antarctica; early Palaeozoic; subduction-accretion margin.

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