Hokkaido University of Education at Kushiro
National Institute of Polar Research
Faculty of Technology, Iwate University
抄録(英)
Meta-trondhjemites (ca. 1000 Ma) from Cape Hinode, Lutzow-Holm Complex (LHC), East Antarctica are characterized by relatively high Al (Al_2O_3>15% at 70% SiO_2) and Sr, and low Y and Yb contents, which are chemically similar to Archaean trondhjemites and adakites. Trace element modelings of the partial melting of MORB suggest that igneous protoliths of the meta-trondhjemites were derived by partial melting of a basaltic source material under garnet stability P-T conditions. We suggest that a young hot subducting plate along LHC at 1000 Ma may have reached elevated temperatures which initiated melting of the slab.
雑誌書誌ID
AA1072335X
雑誌名
Proceedings of the NIPR Symposium on Antarctic Geosciences
PETROGENESIS OF THE META-TRONDHJEMITES FROM CAPE HINODE, EAST ANTARCTICA
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KJ00002368120
(1.09MB)
概要
