摘要
对徐海—石头岗花岗闪长岩体围岩中黑云母及有机质变质程度的研究发现:距岩体580m范围内的接触带岩石皆具有角岩化现象。黑云母含量受原岩成分影响,其鳞片粒径与岩体距离密切有关。围岩中镜质组反射率,(R_(mas))值与岩体距离之间有十分明显的规律。
The metamorphsim of the rocks of contact belt is caused by high temperature resulting from the magma intrusions. There are hornfellized texture of the rocks of contact zone within a distance of 580 m from the rock body observed in the research on metamorphic grade of bioite and organic mineral. The content of biotite is affected by the composition of protolith.The size is closely related to the distance from the rock body. The relation between the reflection factor of vitrinite (Rmax0) and the distance is expressed by a index function,i.e. l/Y = a + be x,
关键词
花岗闪长岩
围岩
热影响
thermal affectness, vitrinite reflectance, grandiorite
