摘要
藏东喜马拉雅期Ａ型花岗岩主要分布于玉龙斑岩铜（钼） 矿带西侧。众多碱钙性小斑岩体构成一个走向ＮＮＷ的花岗岩带。主要岩性有碱长石英正长岩、石英正长岩和碱长正长岩。岩浆主要来源于上地幔。侵位时代为喜马拉雅期（ＫＡｒ 年龄值为３６～４５ Ｍａ） ，侵位时的构造环境为造山后板内走滑变形环境。
A type granite belt to the west of the Yulong porphyry copper( molybdenum)belt in east Tibet consists of many small porphyry bodies which were emplaced in Hinalayan period The A type granite consists mainly of syenite porpgyry with a K Ar age of 36～45 Ma and a petrogenetic setting of intraplate deformation
出处
《四川地质学报》
1999年第3期210-214,共5页
Acta Geologica Sichuan
关键词
岩石化学
A型花岗岩
喜马拉雅期
西藏东部
petrochemistry, A type granite, Himalanyan Period, east of Tibet
