大兴安岭北段西呼和楚鲁地区地球化学特征与找矿方向  

Geochemical Characteristics and Prospecting Direction of Xihuhechulu Area, Northern Da Hinggan Mountains, China

作　　者：王春松[1] 桂新星 闫红圃[1] 张伟[1] 张得恩[1] WANG Chun-song GUI Xin-xing YAN Hong-pu ZHANG Weil ZHANG De-en(Henan institute of geological survey, Henan Key Laboratory for Metallogenetic Process of Metal Mineral Resource and Resource Utilization, Zhengzhou, Henan 450001, China 11enan institute of geological sciences, Zhengzhou, Henan 450001, China)

机构地区：[1]河南省地质调查院河南省金属矿产成矿地质过程与资源利用重点实验室,河南郑州450001 [2]河南省地质科学研究所,河南郑州450001

出　　处：《矿物学报》2017年第4期401-410,共10页Acta Mineralogica Sinica

基　　金：内蒙古自治区地质勘查基金项目(编号:NMKD2009-25)

摘　　要：西呼和楚鲁地区位于大兴安岭北段,由于森林沼泽覆盖和自然保护等原因,地质调查工作程度低,尚未取得找矿突破。近期开展的地球化学调查成果显示,与陆壳克拉克值相比,区域Ag、Pb、W、As、Sb、Bi元素富集,尤其是在石炭系莫尔根河组和早石炭世闪长岩、晚泥盆世石英闪长岩中含量很高,Cu、Au、Sn相对贫化;大多数成矿元素在区域内分布不均匀,尤其是Au、Ag、Mo、Bi在侏罗系满克头鄂博组、石炭世二长花岗岩和闪长岩体出露区分异极强,Cu在泥盆系大民山组、早白垩世花岗岩中,Au在石炭系莫尔根河组、晚泥盆世石英闪长岩中呈强分异型分布,在局部区域存在富集甚至强烈富集,较为利于成矿。区域主要成矿元素为Au、Pb、Ag、Mo、Cu,伴生成矿元素为W、As、Sb、Sn、Mn、Bi、Zn,主要成矿类型为热液型、火山岩型。根据区域地球化学特征,预测区域成矿潜力较大的地区为锡尼河-那日斯毛德、大架子山、一支沟-小孤山等地。Xihuhechulu area is located in the north ofDa Hinggan Mountains. It is covered by forest or bog under natural conservation; the geological survey in this area is not enough and no deposits have been discovered. Recent geochemical survey results show that Ag, Pb, W, As, Sb, and Bi are rich, especially in the Carboniferous Moergenhe Formation and Early Carboniferous diorite and Late Devonian quartz-diorite, but Cu, Au, and Sn are relatively depleted comprised with the crust Clarke value. Most metaUogenic elements are not evenly distributed in the area, especially, Au, Ag, Mo and Bi strongly differentiate in the outcrops of the Jurassic Manketouebo Formation and Carboniferous monzonitic granite and diorite. Cu is in strong differentiation in the Devonian Daminshan Formation and Early Cretaceous granite, and Au is also in strong differentiation in the Carboniferous Moergenhe Formation and Late Devonian quartz-diorite, and very rich in some local areas. In this area, the main metaUogenic elements are Au, Pb, Ag, Mo, and Cu and the associated metallogenic elements are W, As, Sb, Sn, Mn, Bi and Zn, mainly in hydrothermal and volcanic metallogenic types. According to the regional geochemical characteristics, Xinihe--Narisimaode, Dajiazishan and Yizhigou--Xiaogushan may be high metallogenic potential areas.

关 键 词：地球化学特征 因子分析 成矿预测 西呼和楚鲁地区 大兴安岭北段 

分 类 号：P596[天文地球—地球化学] P612[天文地球—地质学]