地球学报
地毬學報
지구학보
ACTA GEOSCIENTIA SINICA
2013年
z1期
65-70
,共6页
缪应理%陈智明%涂长寿%朱加景
繆應理%陳智明%塗長壽%硃加景
무응리%진지명%도장수%주가경
老君山成矿区%南捞片麻岩(Ngn)%新寨岩组(Pt3x)%剥离断层%铜钨矿床
老君山成礦區%南撈片痳巖(Ngn)%新寨巖組(Pt3x)%剝離斷層%銅鎢礦床
로군산성광구%남로편마암(Ngn)%신채암조(Pt3x)%박리단층%동오광상
Laojunshan metallogenic area%Nanlao gneiss%Xinzhai Formation%Detachment fault%Cu-W deposit
南捞铜钨矿床是老君山花岗岩体北西翼外接触带新发现的一个矿床,探明铜钨资源储量均达到小型规模。铜钨矿化部位主要位于剥离断层附近的新寨岩组(Pt3x)片岩与南捞片麻岩(Ngn)之间,赋矿围岩普遍发生硅化、矽卡岩化蚀变。通过成矿地质背景和矿床地质-地球化学特征研究,表明该矿床具有多因素复合控矿、成矿物质具有多来源的特征,初步总结了矿床成因,认为该矿床与区内多期次构造-岩浆活动有关,并指出了本区下一步的找矿方向。
南撈銅鎢礦床是老君山花崗巖體北西翼外接觸帶新髮現的一箇礦床,探明銅鎢資源儲量均達到小型規模。銅鎢礦化部位主要位于剝離斷層附近的新寨巖組(Pt3x)片巖與南撈片痳巖(Ngn)之間,賦礦圍巖普遍髮生硅化、矽卡巖化蝕變。通過成礦地質揹景和礦床地質-地毬化學特徵研究,錶明該礦床具有多因素複閤控礦、成礦物質具有多來源的特徵,初步總結瞭礦床成因,認為該礦床與區內多期次構造-巖漿活動有關,併指齣瞭本區下一步的找礦方嚮。
남로동오광상시로군산화강암체북서익외접촉대신발현적일개광상,탐명동오자원저량균체도소형규모。동오광화부위주요위우박리단층부근적신채암조(Pt3x)편암여남로편마암(Ngn)지간,부광위암보편발생규화、석잡암화식변。통과성광지질배경화광상지질-지구화학특정연구,표명해광상구유다인소복합공광、성광물질구유다래원적특정,초보총결료광상성인,인위해광상여구내다기차구조-암장활동유관,병지출료본구하일보적조광방향。
The Nanlao Cu-W deposit, a newly-discovered ore deposit, is located in the northwestern periphery of the Laojunshan granite body. Its proved Cu and W reserves have reached the middle scale, as evidenced by recent exploration. The Cu and W mineralization occurs near the interbedded detachment faults between Xinzhai Formation and Nanlao gneiss. The ore bodies are mainly hosted in the wall rocks which experienced alterations such as silicification and skarnization. The geological and geochemical characteristics of the ore deposit suggest that the mineralization of the ore deposit was mainly controlled by Yanshanian granites, strata and detachment faults, and the ore-forming materials might have been mainly derived from Yanshanian and Caledonian granites. It is held that the formation of this ore deposit was related to the multiphase tectonism-magmatism. In addition, the ore-prospecting direction in Laojunshan area is pointed out in this paper.