Discovery and study of high-pressure basic granulites in Songshugou area of Shangnan, East Qinling
Discovery and study of high-pressure basic granulites in Songshugou area of Shangnan, East Qinling
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DOI：
10.1360/sb1995-40-5-400
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发表时间：
1995-03
影响因子：
--
通讯作者：
刘良;周鼎武
中科院分区：
文献类型：
--
作者：
刘良;周鼎武
1地质产状北秦岭松树沟地区超镁铁岩在构造上侵位于中晚元古代斜长角闪岩中（图1），被认为是一个外部无根蛇绿岩片，侵位年龄为（983±140）Ma。透镜状透辉石榴角闪岩出露于角闪岩中，也有人称之为石榴角闪岩。本文讨论的高压基性麻粒岩是在透镜状石榴石中发现的-
1 Geological occurrence The ultramafic rocks in the Songshugou area of the North Qinling are structurally emplaced in middle-late Proterozoic amphibolites (fig. 1) which are regarded as an external rootless ophiolite sheet with emplacement age of (983±140) Ma. The lenticular diopsidegarnet-amphibolites, named garnet-amphibolte by others, are exposed in the amphibolits. The high-pressure basic granulites discussed in this note were found in the lenticular garnet-