摘要
老王寨－东瓜林金矿床的构造解析表明，在老第三纪（主要成矿期）矿区内主压应力为ＮＥ—ＳＷ向。通过对东瓜林１７５３ｍ中段有限单元法模拟的最大主应力等值线图、剪应力等值线图及Ａｕ品位等值线图等分析，发现断裂带或构造岩块尖灭部位（即断裂尖灭部位）均是主压应力和剪应力值极低区，恰好这些地段也是有利Ａｕ矿体赋存的构造部位。这表明，在构造破碎程度较大的部位易造成应力的释放，从而有利于矿液的充填和矿质沉淀，以赋存矿体。
The structural analysis of Laowangzhai Donggualin Au deposit indicates that the main compressional stress direction of the ore field was NE SE in palaeogene (the main matallogenic epoch). The study of the isograms (including compressional stress, shearing stress and gold tenor) shows that lower stress os almost in the fault belts of at the extinction of the struetural rock block, where gold tenor is higher. Boundary element method analysis of the stress field indicates that compressional stress and shearing stress are easy to escape in fractured zones, where are the superior locations for ore fluid deposition and ore formation.
出处
《云南地质》
1994年第2期158-165,共8页
Yunnan Geology
