In Grubenmann's abyssal zone, this is the deepest metamorphic zone. It is characterized by very high temperatures, hydrostatic pressures and low stresses. The index minerals are pyroxene, olivine, feldspar, mica, sillimanite, cordierite, spinel and garnet [Becke: 1903, Grubenmann & Niggli: 1924]. Source: Asakura Publishing Dictionary of Petrology Information |
グルーベンマンの深度帯の考え方では最も深部の変成作用の帯.非常に高い温度と静水圧で弱い応力が特徴である.指標鉱物(index mineral)は輝石,橄欖(かんらん)石,長石,雲母,珪線石,菫青石,尖晶石,石榴石である[Becke : 1903, Grubenmann & Niggli : 1924]. 出典 朝倉書店岩石学辞典について 情報 |
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