山西省落家河铜矿地质特征及矿床成因浅析  

ANALYSISI OF THE GEOLOGICAL FEATURES AND DEPOSIT GENESISI OF LUOJIAHE COPPER DEPOSIT,SHANXI PROVINCE

作　　者：孙桂琴[1] 霍卫民[1] 

机构地区：[1]中国冶金地质总局第三地质勘查院,山西侯马043001

出　　处：《化工矿产地质》2011年第4期232-238,共7页Geology of Chemical Minerals

摘　　要：落家河矿田位于中条三叉裂谷南东支的落家河构造剥蚀天窗内,该区域位于线性构造和弧形构造的交叉部位,是成矿有利部位。落家河矿区赋矿岩性为新太古界绛县群宋家山组绿泥片岩和变细碧岩。宋家山组一套钠质中基—中酸性火山凝灰岩夹正常沉积钙质副变质岩组成。经变质后的绿片岩层是主要找矿层位,特别是该岩层沿走向或倾向变化大和膨胀部位。硅化、绢云母化、石墨化较强部位,尤其石墨化是重要找矿标志。落家河铜矿床是在绛县群沉积晚期海底喷发的远火山凝灰物质在弱还原的沉积环境中形成矿源层,经中条期的区域变质作用,矿源层中的铜元素进一步富集而成矿。矿床类型属层控的变质热液铜矿床。Luojiahe ore field is located in Luojiahe tectonic windows southeast of Zhongtiao three armed rift, which is the cross of linear structure and arc structure, and is avail for the forming of the deposit. The lithology of Luojiahe deposit is chloriteschist and metamorphic spilite of Songjiashan team, Jiangxian group, early Archaeozoic Erathem. Songjiashan team is composed of intermediate-basicintermediate-acidic volcanic tuff sandwiched calcareous para metamorphic rock. The metamorphic greenschist terrane is the maijor prospecting place, especially with great change of strike or dip and dilatancy. The high silicification, sericitization and graphite are prospecting symbols, and graphite is the most important symbol. Luojiahe copper deposit is source bed composed of volcanic tuff from submarine eruption in the weak reductive conditions. After regional metamorphism of Zhongtiao Age, the Cu enriched and deposited. The metallogenic model is metamorphic hydrothermal fluid.

关 键 词：绛县群宋家山组 弱还原 沉积环境 变质热液 

分 类 号：P618.41[天文地球—矿床学]