摘要
1∶5万地质填图发现 ,屯昌地区存在印支期爆破角砾岩筒 ,它的形成明显受北东向、北西向基底断裂带的控制 ,平面上呈似椭圆状 ,该岩筒由爆破角砾岩、震碎角砾岩及崩塌角砾岩组成 ,含四种成分的角砾。岩筒的形成年龄为 2 2 8.2± 3.7Ma。
During the 1/50000 mapping,an explosive breccia pipe look an ellipsoid in shape was disco vered in Tunchang area, central Hainan island. The pipe is controlled by the NE trending and NW trending basement faults and was formed during the Indosinian Period with a zircon U Pb age of 228.2±3.7Ma,consisting of explosive breccia, broken breccia and falling breccia.
出处
《华南地质与矿产》
CAS
2000年第3期42-45,共4页
Geology and Mineral Resources of South China
关键词
爆破角砾岩筒
地质特征
印支期
海南岛
分布
Explosive breccia Geological characteristics Indosinian Period Hainan island
