河南嵩县南部地区成矿地球化学特征

河南嵩县南部地区位于豫西东秦岭成矿带上,区内广泛分布熊耳群火山岩系,马超营大断裂从其南部通过,南部有燕山期花岗岩基.对区内地层、构造、岩浆岩地球化学特征的分析表明该区为低背景成矿；熊耳群鸡蛋坪组地层和安山岩、凝灰岩有利于成矿；成矿元素在断裂尤其是次级断裂中富集；燕山期岩体周边形成一个高温异常带；地球化学场表现为“一线两环两面”的特征.指出沿马超营断裂带和燕山期花岗岩基外围,熊耳群鸡蛋坪组安山岩、凝灰岩是寻找金、银、铅、锌、钼矿的有利地区.

Geochemistry Characteristics of Mineralization in the South Songxian County, Henan Province

The south Songxian County of Henan province locates in the eastern Qinling metallogenic belt of the western Henan.The volcanic rocks of the Xiong’er group distribute extensively in this area.The Yanshanian granitic batholiths are found in and the Machaoying fault cuts through the south part of the research area.Abundant nonferrous and precious metals are hosted in this area.According to the geochemistry characteristics of strata,structures and magmatic rocks of the area,we concluded that although the background mineralization concentrations are relatively low,the Jidanping Fm in the Xiong’er Group,Andesite and Tuff are favorable for mineralization,the metallogenetic elements are enriched in fault structures,especially in the secondary fault zones.A high temperature zone was formed around the Yanshanian granite and its geochemical field can be depicted by "one way-two loop-two region" model.This study suggested that Jidanping Fm in the Xiong’er Group,Machaoying fault zone,zones around Yanshanian granitoids,Andesite and Tuff may be the advantageous areas for Au-Ag-Pb-Zn-Mo deposits.