There were several major types of fractures of the volcanic rock reservoirs: primary fracture and secondaryfracture.
本区火山岩油藏的裂缝类型主要有以下几种：原生裂缝和次生裂缝。
2
The duration between primary and secondaryfracture were 16.6 months(8 to 47 months), all the primary fractures healed clinically.
再骨折发生时间在内固定后平均16.6个月（8～47个月），原骨折均已临床愈合。
3
Pingcha gold deposit is a Sb-Au of rich in sulphide, controlled by the E-W secondaryfracture and alteration zone and being small in scal but high in grade.