摘要
大望海寨岩体位于营口—宽甸台拱与下辽河断陷连接带的东侧,侵位于燕山旋回晚期,其岩石地球化学特征与钙碱性花岗岩十分相似,通过花岗岩类自然矿物岩石化学换算法证明其应归于二长花岗岩类,其主要岩石类型应为斑状含黑云二长花岗岩和淡色二长花岗岩。其成岩物质主要由上地幔衍生出的岩浆与下地壳部分熔融所产生的岩浆同熔而成。成因类型属I型同熔花岗岩类。
The Dawanghaizai rock body is located in Yingkou-Kuandian platform convex and the east side of the lower Liaohe fault connect belt, it was emplaced in the late Yanshanian cycle; from the petrochemical characteristics, it is very similar to calc-alkaline granite. Throuth the natural mineral petrochemical conversion method, it is verified that Dawanghaizai rock body should be adamellite, the rock types should be porphyritic biotite adamellite and leucocratic granite. The petrogenetic matter is composed of the magma derived from the upper mantle and magma formed from lower earth crust, the genetic type belongs to I type syntactic granite.
出处
《吉林地质》
2009年第1期6-11,共6页
Jilin Geology
关键词
大望海寨岩体
岩石地球化学特征
I型同熔花岗岩
Dawanghaizai rock body
petrochemical characteristics
I type syntactic granite
