摘要
内蒙古卓资一带孔兹岩系中的辉石、角闪石、石榴石、黑云母均形成于麻粒岩相条件。二辉石地质温度计和石榴石—黑云母地质温度计和压力计计算结果表明,孔兹岩系岩石的变质温度为750—850℃,变质压力为800—920 MPa,变质地温梯度为26.2—28.5℃/km,属中压麻粒岩相。
The rocks of khondalite series of granulite facies including various kinds of granulites, gneisses and marbles are distributed in Zuozi area of Nei Menggu. Mineralogical studies indicate that the pyroxenes,hornblendes,garnets and biotites in the rocks of khondalite series are formed at the high temperature condition of granulite facies. Using orthopyroxene-clinopyroxene geothermometer and garnet-biotite geothermometer-barometer, it is calculated that the metamorphic temperature and pressure of khondalite series range between 750—850℃ and between 800—920Mpa, respectively with geothermal gradient of 26. 2—28. 5℃/km,belonging to middle pressure granulite facies of metamorphism.
出处
《矿物岩石》
CAS
CSCD
1992年第4期36-43,共8页
Mineralogy and Petrology
关键词
孔兹岩
成因
矿物学
石榴石
黑云母
khondalite series
genetic mineralogy
metamophism
Achean
Zuozi of Nei Menggu
