河北阜平地区太古宙变质深成岩与金矿的关系初探  

PRELIMINARY DISCUSSION ON RELATIONSHIP BETWEEN ARCHEAN METAMORPHIC PLUTON AND GOLD DEPOSITS IN FUPING,HEBEI PROVINCE

作　　者：夏国礼 张家奇 杨进京 

机构地区：[1]河北省地质调查院,廊坊065000 [2]河北省地球物理勘查院,廊坊065000

出　　处：《地质与勘探》2007年第4期46-50,共5页Geology and Exploration

基　　金：中国地质调查局项目(编号:200310200055)资助

摘　　要：区内变质深成岩由阜平岩群变质表壳岩经深部重熔作用形成,典型特征是低钾富钠,具有TTG岩石特点。经对变质深成岩成矿元素的研究表明:①Au元素丰度值很高(平均2.10×10-6),远远高于世界中性—中酸性侵入岩及地壳中Au元素的丰度值;②Au元素浓集克拉克值(488.37)远远大于1,呈非常强的富集状态;③Au元素在变质深成岩中的变异系数(0.65)几乎是区内变质表壳岩中Au元素的2倍,有利于Au元素的聚集成矿。故变质深成岩应是成矿物质的主要提供者。Metamorphic plutons in the Fuping area were derived from anatectie melting of supraerustal rocks of Fuping group, which are low in potassium and rich in sodium and are also characterized by geochemistry of TTG. Ore - forming element studies of the metamorphic plutons give following conclusions. Firstly, compared with intermediate to intermediate - acidic intrusive rocks and continental crust, these rocks possess very high abundance of Au with average2.10 × 10^ - 6. Secondly, concentration Clarke value （488.37） of Au is much larger then 1, showing these rocks are strongly enriched in Au. Thirdly, Au variation coefficient （0.65） in the rocks is nearly two times as large as that of metamorphic supracmstal rocks in the area, being advantageous to forming gold deposits by accumulating of Au. Therefore, it is concluded that metamorphic plutons should be the source materials for gold deposits.

关 键 词：变质深成岩 深部重熔作用 金矿矿源体 河北阜平地区 

分 类 号：P588.34[天文地球—岩石学] P618.51[天文地球—地质学]