云南个旧矿区龙树脚含矿断裂带构造成因及找矿远景

Genesis and Prospecting Potential of Longshujiao Ore-bearing Fault Belt in Gejiu Mining Area in Yunnan Province

通过对个旧矿区龙树脚含矿断裂带(Ⅱ-11#含矿断裂带)构造地质特征的分析,探讨了矿区断裂构造的形成机理,即地层的构造运动及成矿物质的沉淀、搬运等物理过程,认为龙树脚含矿断裂带的成矿部位主要集中于断裂挟持带、断裂与互层(地层)交切部位、断裂扎根部位、断裂分支复合部位以及断裂转折端部位。在此基础上,进一步分析认为金属元素分带、构造、围岩蚀变、化探原生晕等矿区有利找矿标志;断裂与互层交切部位、断裂转折端、断裂交汇(切)锐角挟持带、断裂带分支复合部位为矿区有利的找矿部位。

Based on the analysis of tectonic geological characteristics of Longshujiao ore-bearing fault belt （ Ⅱ-11^#ore-bearing fault belt） in Gejiu mining area in Yunnan Province ,the formation mecha- nism （ tectonic movement of strata and the physical process of sedimentation and movement of metallogen- ic material） of the fault belt is discussed,the results show that the metallogenic areas of Longshujiao ore- bearing fault belt are mainly for fault entrainment belt, intersection part of fault and interlayer （strati- graphic ）, fault roof part, fault branches compound part and fault transition part. Based on the above analy- sis results, the favorable prospecting indicators of Geijiu mining area are mainly for metal element zoning, structure, surrounding rock alteration and geochemical primary halo, the intersection part of fault and in- terlater （ stratigraphic）, fault transition part, acute angle capture belt of fault intersection, fault belt bran- ches compound parts are the favorable prospecting parts of the mining area.