摘要
对肖家营子岩体及钼多金属矿床地质特征的研究表明 ,矿区内辉长辉绿岩 -斑状细粒闪长岩时代属燕山期 ( 1 77～ 1 1 3Ma) ,是一个来自深部同源不同期次侵位、富含成矿元素和挥发分的复式岩体 ,较我国典型斑岩钼矿床成矿岩体明显偏基性 .以钼为主的多金属矿体和围岩蚀变主要赋存于辉长辉绿岩 -斑状细粒闪长岩斑岩体的内外带 ,并围绕着复式岩体呈半环形偏心式带状分布 .矿床围岩蚀变以硅化、钾化和矽卡岩化最为强烈 ,且与钼多金属矿化关系最密切 .主要成矿温度为 2 5 0～ 4 0 0℃ ,δ3 4 S 1 1‰～ 4 4‰ ,岩体和矿体的硫同位素组成具有一致性 .成矿物质主要来源于晚期侵入的斑状细粒闪长岩 ,随着成矿热液的演化、扩散和运移 ,在不同空间先后形成了斑岩型钼矿、矽卡岩型钼铜铁矿和裂隙充填型银铅锌矿的统一成矿系列 ,矿床成因类型为“三位一体”
From the characterstics on Lothochemistry and geochemistry,it is found out that the Geological features of the Xiaojyayingzi intrusion and Molybdenum polymetallic deposit,gabbro-diabase-porphyry fine diorite of Xiaojiayingzi ore district belong to Yenshanion period(177～113 Ma).It is an integrated intrusion which is deep-seated,syngenetic,rich in trace elements and Volatile compounds and obviously low compared with other intrusion SiO 2 content of intrusion of the typical porphyry type molybdenum deposit in China,Molybdenum polymetallic orebodies and alteration occur within the gabbro-diabase-porphyry fine diorite porphyry body.There exists in a half circle around the intrusion molybdenum polymetallic mineralization closely related with intrusion alteration.The temperatures for the mineralization are 250～400℃.δ 34S 1.1‰～4.4‰.The sulfur isotopic composition of Xialjiayingzi intrusion and orebodies are uniform.The ore-forming substances are derived from the porphyry fine diorite which intrudes later. With the ore-fluid evoluted,dissipated,transferred thus forms the porphyry molybdenum orebodies.skarn molybdenum copper Iron orebodies.fissure metasomatic-filling sliver lead zinc orebodies.All in all Xiaojiayingzi molybdenum polymetallic deposit is an integrated porphyry type deposit.
出处
《桂林工学院学报》
2002年第1期5-10,共6页
Journal of Guilin University of Technology
基金
原中国有色金属工业总公司华北地台北缘多金属成矿带 (辽西段 )地质找矿资助项目 (1989- 2 3)
