摘要
区内NW向基底走滑断裂所处构造应力场派生出NE走向低角度斜冲、NEE向右行平移、近NW向左行平移以及NNW向平移断裂、裂隙等第一序次构造 ,它们各自又派生出更低序次的剪切断裂、裂隙。方向相近、性质相同、序次不一或相同的剪切裂面相互复合、追踪 ,被含锡脉体充填后 ,形成区内NE、近EW、近SN、NW向几组优势脉组。不同地段的优势脉组在区内呈NW向带状展布。矿脉密集、成群、等距分布 ,其平面展布、尾端型式和脉壁特征均显示区内容矿构造具剪切特征。
The greisen vein type tin orebodies in Dayishan orefield are characterized by large in scale and rich in tin as well as easy in processing and smelting.The first order structures in the orefield include NE ,EEW ,NW and NNW striking faults derived from the stress field of NW striking basement glide fault.The second order shear faults or cracks are derived from the first order structures which are filled With the tin bearing quartz veins,forming NE ,SN and NW striking ore sets distributed along the NW striking structural zone and concentrated in group with tail type characteristics,showing that the host structures in Dayishan orefield have the characteristics of shearing.
出处
《华南地质与矿产》
CAS
2002年第1期29-33,共5页
Geology and Mineral Resources of South China
