河南省前河金矿控矿构造及其与成矿的关系

CONTROLLING STRUCTURES OF QIANHE GOLD DEPOSIT AND THEIR RELATIONSHIP WITH GDLD DEPOSITION

前河金矿控矿构造主要为发育在区域性卢氏-潘河-马超营断裂北侧的近东西向断裂构造,按断裂间的相互关系、蚀变矿物及其共生组合特征,划分出6次构造活动并相应划分出6个矿物生成阶段。以硅化、绿帘石化、绢云母化、绿泥石化等为标志的第二至第五阶段为成矿阶段。碎裂岩带是矿体的主要控矿构造类型;受节理控制的矿体多分布于控矿断裂的两侧。在断裂带中Ag、Cu、Pb、Zn、Mo、Ni等元素含量普遍增高。沿断裂微量元素的含量有一定变化,在矿区东段Ag、Cu、Pb、Zn含量相对增高,而Bi、Mo、Cr、Co、Ni等在西段较高。Ag、Cu、Pb、Zn等多集中分布在矿体上部;而Bi、Mo、Cr、Co、Ni等主要集中分布在矿体的中下部。据此认为东段目前所出露的矿体是整个矿体的中上部,而西段是整个矿体的中下部。故应注意在东段下部的找矿。

Qianhe gold deposit is mainly controlled by a EW fault developed on the north of the re-gional Lushi -Panhe -Machaoying fault. According to the relationship between faults, al-tered minerals and their paragenic characteristics, six structural activities and six correspond-ing stages of mineral development are recognized. The second to fifth stages are those of de-position characterized by silicification,epidotization,sericitization and chloritization,Ore bod-ies are mainly controlled by cataclast belt and joint-controlled bodies occurs largely on sides of controlling faults. The contents of elements Ag, Cu, Pb, Zn, Mo and Ni are all increased along the fault belt. And Ag, Cu, Pb and Zn higher in the east and Bi, Mo, Cr, Co and Ni higher in the west of the deposit. Ag, Cu, Pb, and Zn are rich in the upper part of ore bodies; Bi, Mo, Cr, Co, Ni are rich in the middle and lower part, Such a conclusion can be reached that the ore bodies seen in the east belong to the middle and upper part of a large body and those in the west to the middle and lower part. More attention should be paid to the lower part of the east part.