论文部分内容阅读
云母类矿物是花岗岩类的主要造岩矿物之一,是目前广泛用于钾-氩法测定同位素地质年龄的主要对象。通过研究可以探索岩浆岩的成因和演化,确定岩体的时代以及成岩后所经受的地质作用等。本文所讨论的黑云母,是指花岗岩类的岩浆上侵定位时结晶的黑云母,经受后期的热动力作用产生弯曲、破碎和解析再结晶的云母。根据化学成分和X光粉晶分析结果,说明这种重结晶的云母仍是黑云母。
Mica minerals are one of the major rock-forming minerals in granitoids and are the main objects widely used in the determination of isotopic geologic age by potassium-argon method. Through research, we can explore the genesis and evolution of magmatic rocks, determine the age of the rock mass and the geological effects experienced after diagenesis. The biotite discussed in this paper refers to the biotite that is crystallized when the magma in the granite is intruded, and subjected to the later thermodynamic action to produce bent, broken and recrystallized mica. According to chemical composition and X-ray powder analysis, indicating that the recrystallized mica is still biotite.