@article{oai:nipr.repo.nii.ac.jp:00003082,
 author = {Osanai, Yasuhito and Toyoshima, Tsuyoshi and Owada, Masaaki and Tsunogae, Toshiaki and Hokada, Tomokazu and Crowe, Warwick A. and Kusachi, Isao},
 journal = {Polar geoscience},
 month = {Oct},
 note = {P(論文), The summer party of the 39th Japanese Antarctic Research Expedition (1997-1998) carried out geological field work on Bunt Island at the southeastern end of Amundsen Bay, Enderby Land, which is in the highest-grade metamorphic region in the Napier Complex. The island is underlain by various kinds of ultrahigh-temperature (UHT) metamorphic rocks including osumilite-bearing aluminous sapphirine-garnet-orthopyroxene granulite and quartz-predominant sapphirine-garnet-sillimanite gneiss containing the assemblage sapphirine-quartz. Osumilite-bearing aluminous granulite is silica-undersaturated, aluminous and magnesian chromium-rich chemical affinity. Osumilite-bearing granulite from Bunt Island could be formed through the mixing of clayey materials or other felsic components derived from felsic igneous rocks with a relatively high proportion of mafic to ultramafic detritus in the sedimentary precursor. The chemical mixing could have taken place during c. 3.2 and c. 2.5 Ga. P-T estimation for osumilite-bearing granulite and related sapphirine-quartz gneiss indicates ultrahigh-temperature condition (～1100℃, ～1100 Mpa) as well as other high-grade rocks from the Napier Complex, but the rocks from Bunt Island clearly show isothermal decompression in part of the clockwise P-T evolutional process.},
 pages = {1--24},
 title = {Ultrahigh temperature sapphirine-osumilite and sapphirine-quartz granulites from Bunt Island in the Napier Complex, East Antarctica -Reconnaissance estimation of P-T evolution -},
 volume = {14},
 year = {2001}
}