当岩浆侵围岩时,在侵入体与围岩接触带附近,由于受岩浆所散发的热量及气体挥发剑分或流体的影响,围岩发生重结晶、变质结晶和交代作用等,形成接触变质岩。一般变质岩分为两大类,大面积变质的岩石为区域性的,但也有局部性的,局部性的如果是因为岩浆涌出造成周围岩石的变质称为接触变质岩;如果是因为地壳构造错动造成的岩石变质为动力变质岩。
从红柱石的结晶程度分析,这种无烟煤是一种低级热接触变质岩。
Having analysized the degree of crystallization of andalusite, it is believed that the anthracite is a low-grade thermal metamorphic rock.
本文介绍了冀中廊固凹陷辉绿岩及其接触变质岩——斑点板岩的储层特征。
This paper introduces the reservoir characteristics of diabase, contact meta- morphic rocks and spotted slates in Langgu subdepression, Jizhong depression.
本区内的金矿断裂构造即花岗岩与太古代胶东群变质岩呈构造接触带。
The faults related to the gold deposits in the area often follow the contact between granites and metamorphic rocks of the Achaean Jiaodong Group.
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