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

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- Ordovici...

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Bibliographic Details
Published in:Antarctic Science
Main Authors: RICCI, C. A., TALARICO, F., PALMERI, R., DI VINCENZO, G., PERTUSATI, P. C.
Other Authors: Ricci, C. A., Talarico, F., Palmeri, R., Pertusati, P. C.
Format: Article in Journal/Newspaper
Language:English
Published: 1996
Subjects:
Antarctica
early Palaeozoic
subduction-accretion margin
Antarctic
Bowers
Lanterman Range
Pacific
The Antarctic
Victoria Land
Antarc*
Online Access:http://hdl.handle.net/11365/3510
https://doi.org/10.1017/S0954102096000399
Description
Summary: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 arc 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.

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