Field occurrence of high-grade metamorphic rocks at telen in the lutzow-holm complex, East Antarctica

Tatsuya Koizumi, Toshiaki Tsunogae, Daniel J. Dunkley, Tomoharu Miyamoto, Mutsumi Kato

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Abstract

We report field occurrence and brief petrographical characters of high-grade metamorphic rocks from Tel en in the granulite-facies zone of the Lützow-Holm Complex, East Antarctica, and correlate the dominant lithologies with those in adjacent exposures. The major rock types in Telen are felsic to intermediate orthogneiss, mafic granulite/amphibolite, calc-silicate rocks, felsic garnet gneiss, and pelitic granulite, which are similar to adjacent localities such as Skallen and Skallevikshalsen, although felsic to mafic orthogneisses are dominant in Telen, while calc-silicate rocks and marbles are more abundant in Skallen and Skallevikshalsen. They have monotonous N-S trending foliation dipping gently (about 20-30°) toward the east. Younger granitoids intrude nearly parallel or perpendicular to the metamorphic rocks. Peak metamorphic conditions have been estimated for a garnet-rich mafic granulite as 860-880°C and 10.1-10.5 kbar, which is consistent with the results of adjacent localities. Our study confirmed that Telen-Skallen-Skallevikshalsen region in the central domain of the granulite-facies zone corresponds to a single mass of high-grade metamorphic rocks, which was formed by Late Neoproterozoic to Cambrian high-grade metamorphism possibly related to the final phase of continent-continent collision during the assembly of Gondwana Supercontinent.

Original languageEnglish
Pages (from-to)3-12
Number of pages10
JournalEarth Evolution Sciences
Volume8
Publication statusPublished - Mar 1 2014

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granulite
metamorphic rock
calc silicate rock
granulite facies
garnet
orthogneiss
supercontinent
amphibolite
foliation
marble
Gondwana
gneiss
lithology
metamorphism
collision
rock
Antarctica
continent

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)

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Field occurrence of high-grade metamorphic rocks at telen in the lutzow-holm complex, East Antarctica. / Koizumi, Tatsuya; Tsunogae, Toshiaki; Dunkley, Daniel J.; Miyamoto, Tomoharu; Kato, Mutsumi.

In: Earth Evolution Sciences, Vol. 8, 01.03.2014, p. 3-12.

Research output: Contribution to journalArticle

Koizumi, Tatsuya ; Tsunogae, Toshiaki ; Dunkley, Daniel J. ; Miyamoto, Tomoharu ; Kato, Mutsumi. / Field occurrence of high-grade metamorphic rocks at telen in the lutzow-holm complex, East Antarctica. In: Earth Evolution Sciences. 2014 ; Vol. 8. pp. 3-12.
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