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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ultra-high-temperature metamorphism ： ウィキペディア英語版 Ultra-high-temperature metamorphism Ultrahigh-temperature metamorphism (UHT) represents extreme crustal metamorphism with metamorphic temperatures exceeding 900 °C.〔Brown, M., 2007, Metamorphic conditions in orogenic belts: a record of secular change. International Geology Review 49, 193-234〕〔〔Santosh, M., Omori, S., 2008a, CO2 flushing: a plate tectonic perspective. Gondwana Research 13, 86-102〕 Granulite-facies rocks metamorphosed at very high temperatures were identified in the early 1980s, although it took another decade for the geoscience community to recognize UHT metamorphism as a common regional phenomenon. Petrological evidence based on characteristic mineral assemblages backed by experimental and thermodynamic relations demonstrated that Earth’s crust can attain and withstand very high temperatures (900-1000 °C) with or without partial melting. ==Definition== Metamorphism of crustal rocks in which peak temperature exceeds 900 °C, recognized either by robust thermobarometry or by the presence of a diagnostic mineral assemblage in an appropriate bulk composition and oxidation state, such as assemblages with orthopyroxene + sillimanite + quartz, sapphirine + quartz or spinel + quartz, generally at pressure conditions of sillimanite stability in metapelites (Brown (2007)〔 following proposal by Harley (1998)〔 ). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ultra-high-temperature metamorphism」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.