黄金科学技术
黃金科學技術
황금과학기술
Gold Science and Technology
2015年
4期
1-7
,共7页
马永吉%杨高杰%刘辰曦%沈柳生
馬永吉%楊高傑%劉辰晞%瀋柳生
마영길%양고걸%류신희%침류생
化探综合异常%酸性火山岩%地球化学特征%异常查证%钼银矿
化探綜閤異常%痠性火山巖%地毬化學特徵%異常查證%鉬銀礦
화탐종합이상%산성화산암%지구화학특정%이상사증%목은광
comprehensive geochemical anomalies%acidic volcanic rock%geochemical characteristics%anomaly verification%molybdenum and silver deposit
内蒙古包脑根布墩一带出露上侏罗统满克头鄂博组酸性火山岩，根据岩性特征可划分为爆发相、溢流相和火山沉积相，矿化蚀变主要有硅化、绢云母化、绿泥石化、绿帘石化和碳酸盐化，局部地段见黄铁矿化和钼矿化。火山岩出露区及其周围圈定了一处以 Mo、Ag 元素为主的1∶5万化探综合异常，异常强度高且规模大；通过异常查证，Mo 元素峰值达433.4μg/g，Ag 元素峰值达3.09μg/g。火山岩岩石和土壤样品中 Mo、Ag 元素明显富集，并且具强分异特征；主量元素中 SiO2含量为72.30%～74.26%，总体表现出高硅、过铝质、分异程度高、高钾钙碱性系列的特征；稀土元素总量（ΣREE）较高，平均为173.38×10-6，中等负铕异常，轻重稀土分馏明显，轻稀土富集。综合分析认为，研究区具有形成与中生代酸性火山岩及后期脉岩有关的钼银矿的潜力。
內矇古包腦根佈墩一帶齣露上侏囉統滿剋頭鄂博組痠性火山巖，根據巖性特徵可劃分為爆髮相、溢流相和火山沉積相，礦化蝕變主要有硅化、絹雲母化、綠泥石化、綠簾石化和碳痠鹽化，跼部地段見黃鐵礦化和鉬礦化。火山巖齣露區及其週圍圈定瞭一處以 Mo、Ag 元素為主的1∶5萬化探綜閤異常，異常彊度高且規模大；通過異常查證，Mo 元素峰值達433.4μg/g，Ag 元素峰值達3.09μg/g。火山巖巖石和土壤樣品中 Mo、Ag 元素明顯富集，併且具彊分異特徵；主量元素中 SiO2含量為72.30%～74.26%，總體錶現齣高硅、過鋁質、分異程度高、高鉀鈣堿性繫列的特徵；稀土元素總量（ΣREE）較高，平均為173.38×10-6，中等負銪異常，輕重稀土分餾明顯，輕稀土富集。綜閤分析認為，研究區具有形成與中生代痠性火山巖及後期脈巖有關的鉬銀礦的潛力。
내몽고포뇌근포돈일대출로상주라통만극두악박조산성화산암，근거암성특정가화분위폭발상、일류상화화산침적상，광화식변주요유규화、견운모화、록니석화、록렴석화화탄산염화，국부지단견황철광화화목광화。화산암출로구급기주위권정료일처이 Mo、Ag 원소위주적1∶5만화탐종합이상，이상강도고차규모대；통과이상사증，Mo 원소봉치체433.4μg/g，Ag 원소봉치체3.09μg/g。화산암암석화토양양품중 Mo、Ag 원소명현부집，병차구강분이특정；주량원소중 SiO2함량위72.30%～74.26%，총체표현출고규、과려질、분이정도고、고갑개감성계렬적특정；희토원소총량（ΣREE）교고，평균위173.38×10-6，중등부유이상，경중희토분류명현，경희토부집。종합분석인위，연구구구유형성여중생대산성화산암급후기맥암유관적목은광적잠력。
It presented acidic volcanic rocks at upper Jurassic Manketouebo Group.According to the lithologic characteristics,it can be divided into eruption facies,the overflow facies and volcanic sedimentary facies, moreover,mineralized alteration mainly showed silicification,sericitization,chloritization,epidotization, carbonatization,but pyritization and molybdenum mineralization in local area.Volcanic rocks exposed and it was found that Mo and Ag elements in surrounding area exhibited 1∶50 000 chemical exploration anomaly with high strength and large scale; through the anomalies,Mo element peak was 433.4 μg/g and Ag element peak was 3.09 μg/g. Additionally,Mo and Ag elements has the feature of obvious enrichment and strong differentiation in volcanic rock and soil samples with main elements of SiO2 whoes content is 72.30% ~74.26% ,overall,it showed high silicon,aluminum,high degree of differentiation,high potassium calc-alkaline series.The amount of rare earth elements(ΣREE)was high with an average of 173.38×10-6,moderate negative europium anomaly,light and heavy rare earth obvious fractionation,enrichment of light rare earth.After comprehensive analysis,we concluded that the study area has formed potential of molybdenum and silver associated with late Mesozoic acidic volcanic rock and ground.
