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1、第23卷第9期中國礦業(yè)V01.23,No.92014年9月CHINAMININGMAGAZINESep.2014江南造山帶東段北緣鄣公山地區(qū)成礦地質(zhì)特征及成礦條件研究廖圣兵,張彥杰,周效華,余明剛,蔣仁,姜楊,陳志洪,趙希林(中國地質(zhì)調(diào)查局南京地質(zhì)調(diào)查中心,江蘇南京210016)摘要:鄣公山地區(qū)屬江南鎢銻金錫多金屬成礦帶九嶺一鄣公山鎢銻金成礦亞帶,對(duì)礦床(點(diǎn))成礦地質(zhì)特征、金屬元素分布特征、地球化學(xué)特征、控礦條件研究顯示:金和銅鉛鋅多金屬礦化受溪口巖群和瑤里一江潭構(gòu)造基性巖帶控制,產(chǎn)于韌性變形帶疊加的后期脆性構(gòu)造破碎帶中,并賦存于次級(jí)斷裂和裂隙中;銻、鎢、鉬礦化與燕山期酸性巖漿熱液活動(dòng)關(guān)系密切
2、,賦存于巖體中及內(nèi)外接觸帶;金、鎢、錫、鉍為研究區(qū)優(yōu)勢(shì)成礦金屬;鄣源基性巖和新元古界地層(包括溪口巖群和雙橋山群),具殼幔混源特征,暗示殼幔相互作用參與利于成礦,中酸性脈巖類形成時(shí)代基本為晚侏羅一早白堊世,屬燕山期中酸性侵入巖體同一巖漿演化晚期產(chǎn)物,基性脈巖具與晚白堊世玄武巖源巖漿特征和成因親緣性,與陸殼引張構(gòu)造背景密切相關(guān);韌性變形帶疊加的次級(jí)斷裂系統(tǒng)形成的蝕變破碎帶或擠壓片理化帶中的后期破碎帶,及擠壓破碎帶兩側(cè)的張性破碎帶是聚礦有利部位,區(qū)內(nèi)以燕山期為主的成礦特點(diǎn),有早期動(dòng)熱變質(zhì)成礦與后期巖漿熱液改造疊加成礦特征。關(guān)鍵詞:江南造山帶;鄣公山;成礦地質(zhì)特征;成礦條件;成礦規(guī)律中圖分類號(hào):P6
3、12;P617;P595文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):10044051(2014)09—0076—07Ore-forminggeologicalcharacteristicsandmetallogenicconditionsinZhanggongmountainareaofeastnorthrimoftheJiangnanorogenicbeltLIAOSheng—bing,ZHANGYan-jie,ZHOUXiao—hua,XUMing—gang,JIANGRen,JIANGYang,CHENGZhi.一hong,ZHAOXi—lin(NanjingCenter,ChinaGeologicalSu
4、rvey,Nanjin210016,China)Abstract:ZhanggongmountainareabelongstotheJiangnanW—Sb-Au—SnpolymetalliemetallogenicbeltofJiuridge—ZhanggongmountainW—Sb-Aumineralizationbelt.Ore-forminggeologicalcharacteristics,metaldementsdistributioncharacteristics,geologicalandgeochemicalcharacteristics,andore—controllin
5、ggeologicalconditionsofoiedeposit/pointareresearchedandresearchresultsshow:AuandCu-Pb—ZnpolymetallicmineralizationcontrolledbyXikourocksandYaoli-一Jiangtantectonicrockzonemainlyoriginatedfromthelatebrittletectonicfracturezoneofductiledeformationzoneoverlay,andoccurrenceinthesecondaryfaultsandfissures
6、;Sb,W,MocloselyrelatedtoYanshanianmagmatichydrothermalactivities,occurrenceinrockmassandtheinnerandoutercontactzone;Au,W,Sn,Biasthestudyareaadvantageore—formingmetal;ZhangyuansourcerockandNeopr0teroz。icstrata(includingXikourocksandShuangqiaoshangroup)havethefeatureofcrust-mantlemixedsource,andindica
7、tethatcrust-mantleinteractionsinvolvedinmineralization;acidicveinrocksformedinthebasicoflateJurassicandearlycretaceousage,whichareinthemid—termacidicintrusiverockmass,arethesameofthelatemagmaticevolut