大兴安岭根河市牛耳河地区钼多金属矿找矿标志浅析

Brief Analysis of Mo Polymetallic Deposit Prospecting Criteria in Niuerhe Area,Genhe City,Da Hinggan Mts.

通过研究区域成矿地质背景、地球物理、地球化学特征和区内现有矿床(种)特点,结合吉峰1∶5万矿调工作成果,建立火山岩地区热液型钼多金属找矿标志:一是北东向与北西向的断裂交汇处;二是白垩纪与侏罗纪之间火山岩的接触带;三是多金属如Mo、As、W、Pb、Cu等元素的地化异常区;四是是寻找钼铜矿的主要标志;四是蚀变形成的硅化、绿泥石化、褐铁矿化、及沸石化。依据找矿标志,确定研究区内金属矿Ⅱ级找矿靶区8个,其中多金属找矿靶区3个、铅锌银多金属找矿靶区3个、钼多金属找矿靶区2个。

Based on the regional metallogenic geological background,geophysical,geochemical features and study area available deposits(ores)peculiarities,combined with results from the Jifeng 1:50,000 mineral resources geological survey,established volcanic rock area hydrothermal Mo polymetallic deposit prospecting criteria.The one is NE and NW fault intersections;the second is volcanic contact zones between Cretaceous and Jurassic strata;the third is polymetallic elements such as Mo,As,W,Pb and Cu geochemical abnormal places;the fourth is Mo,Cu polymetallic deposit prospecting criteria of alteration formed silicification,chloritization,limonitization and zeolitization.Based on prospecting criteria,have defined study area 8 gradeⅡmetallic deposit prospecting targets,in which 3 polymetallic deposit targets,3 Pb,Zn,Ag polymetallic deposit targets and 2 Mo polymetallic deposit targets.