原生裂缝是岩浆冷凝结晶过程中形成的裂缝； 次生裂缝是火山岩及其原生裂缝系统受后期构造运动、溶蚀、风化等作用改造而形成的裂缝。
Primary fracture were formed during the lava crystal and the secondary fracture generated during the volcanic reconstruction by tectonic movement, and wind action, solution.
根据下部区域磁异常，推测地壳下部磁性层受后期的中、新生代岩浆作用的影响很大。
Moreover, from the lower regional magnetic anomaly it can be derived that the lower magnetic layer may be largely affected by the thermal events related to the Mesozoic and Cenozoic magmatism.
韧性剪切作用的动力学背景可能是受后期岩浆侵入的影响，最后的脆性破裂应与区域上存在南北向的压应力有关。
The geodynamic setting of the ductile shear may be the later Magma Intrusion and the brittle fracture is related to the NS-trending stress field in this area.
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