云南易门地区凤山铜矿床矿体空间定位规律和成矿预测

Ore bodies spatial orientation distribution and ore-formingprognosis in Fengshan copper deposit,Yimen area,Yunnan,China

易门凤山铜矿床是昆阳裂谷铜矿带易门式铜矿床的典型代表。矿床明显受刺穿体和构造的控制,矿体赋存于绿汁江组凤山段白云岩中。刺穿构造是指老构造岩片刺穿于新地层中的构造形迹。研究刺穿体、矿体和控制二者的构造之间的关系具有重要的理论价值和找矿意义。构造控制了刺穿体的分布,成矿物质主要来源于刺穿体,而构造和刺穿体是主要的导矿构造,共同控制了矿体的分布。通过研究凤山多个矿体和控制矿体的刺穿体、构造的特点,发现刺穿体和控制刺穿体的构造具有向W—SW倾、刺穿体向S—SW侧伏的特点,受二者的控制,矿体具向S—SW侧伏的特点,这一特征为刺穿体的形成机制研究和深部找矿预测提供了重要依据。

Yimen Fengshan copper deposit is a typical example of Yimen-type copper deposit which is located in the copper mineralized zone of Kunyang rift valley,Yunnan Province,China.The deposit is evidently controlled by diapir and structure,and ore bodys are located in cataclastic dolomite of Lüzhijiang Formation Fengshan member.Diapir structure is a special structural feature with the old tectonic massif pierced in the new formation.Research about the relationship of diapir,ore body and structure of controlling them has important theoretical value and prospecting significance.Structures control the distribution of diapir which provides the mineralization.Structure and diapir are the main ore-controlling which control the distribution of ore bodies.By researching Fengshan ore bodies,diapir of controlling ore bodies and construction features,we discovered that diapir and constructure have the tendency of W-SW,and diapir has the feature of S-SW side of V.By controlling of the two features,ore bodies with the S-SW side of the V characteristics,the characteristics provide an important basis for the ormation mechanism of diaper and the deep ore-finding prognosis.