TY - JOUR
T1 - Field occurrence of high-grade metamorphic rocks at telen in the lutzow-holm complex, East Antarctica
AU - Koizumi, Tatsuya
AU - Tsunogae, Toshiaki
AU - Dunkley, Daniel J.
AU - Miyamoto, Tomoharu
AU - Kato, Mutsumi
N1 - Funding Information:
We express our sincere thanks to the members of. IARE-52 and the crew of the icebreaker Shirase for giving us the opportunity for geological field invstigation of the Uitzow-Holm Complex, and for their helpful support. Especially we thank Dr. T. Hokada, Pro1:essors K. Kawasaki, K. Shiraishi, and Y. Motoyoshifor their support and discussion. We thank Prof Y. Arakawa for his editorial handling. Partial funding for this project was produced by a Grant-in-Aid for Scientific Research (B) from Japan Society for the Promotion of Science (JSPS) to Tsunogae (No. 22403017).
Publisher Copyright:
© 2014, University of Tsukuba. All Rights Reserved.
PY - 2014/3/1
Y1 - 2014/3/1
N2 - 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.
AB - 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.
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M3 - Article
AN - SCOPUS:84961684166
SN - 1881-8463
VL - 8
SP - 3
EP - 12
JO - Earth Evolution Sciences
JF - Earth Evolution Sciences
ER -