赣西萍乡地区变质岩微量元素特征及与成矿的关系探讨

Characteristics of trace elements in metamorphic rocks in the Pingxiang area of western Jiangxi and their relationship with mineralization

赣西萍乡地区变质岩广泛出露,变质岩岩石类型多而复杂。而且以面型分布的区域动压变质岩为主。根据该区不同变质岩成矿微量元素的初步研究:Au Ag Fe Pb Zn元素在萍乡地区含量普遍比地壳克拉克高,而Zn元素则高出二倍,Cu则相对低于地壳克拉克值。另外变质砂岩类中Au Ag含量高于地壳克拉克值;泥质岩类,Cu Pb Zn V Co Ni等元素含量相对变化较大;Au Ag Sn在千枚岩中含量较高,有的还比地壳克拉克值和中国东部沉积岩高出几倍。

Metamorphic rocks are widely exposed in the Pingxiang area of the western area of the Jiangxi province;the types of metamorphic rocks are various and complex,and the regional dynamic pressure metamorphic rocks are the main types present.According to a preliminary study of metallogenic trace elements on different metamorphic rocks in this area,the contents of Au,Ag,Fe,Pb,and Zn in the Pingxiang area are generally higher than those of the crustal clark,while the content of Zn is twice as high and Cu is relatively lower than that of crustal clark.In addition,Au and Ag contents in metamorphic sandstone are higher than the crustal clark value.The contents of Cu,Pb,Zn,V,Co,Ni,and other elements in argillaceous rocks vary greatly.Au,Ag,and Sn content is higher in the phyllite,at times even higher than the earth's crust clark values and several times higher than that of sedimentary rocks of eastern China.