CAJ | 학술논문

川西龙门山地区元古宙变质火山碎屑岩系中发育一系列块状黄铁矿型铜矿床,含矿围岩形成于岛弧构造环境.矿石中黄铁矿占金属矿物总质量分数的90%左右,黄铜矿质量分数为0.8%~3.0%,闪锌矿为1%~4%.矿石主要元素为Fe、S、Zn、Cu、Mn等,其次为Ag、Au、Pb、Se、Cd、Ga、Ti、V、Co等元素,全区各矿层矿石中δ(34S)分布范围为 -1.5‰~+15.9‰,平均为 +7.6‰,N(32S)/N(34S)值为22,据此推断成矿物质应来自地壳深部,与洋壳俯冲作用有关.主要金属硫化物及其微量元素和硫同位素组成特征表明矿床类型为火山成因块状硫化物矿床,即VMS矿床.
천서룡문산지구원고주변질화산쇄설암계중발육일계렬괴상황철광형동광상,함광위암형성우도호구조배경.광석중황철광점금속광물총질량분수적90%좌우,황동광질량분수위0.8%~3.0%,섬자광위1%~4%.광석주요원소위Fe、S、Zn、Cu、Mn등,기차위Ag、Au、Pb、Se、Cd、Ga、Ti、V、Co등원소,전구각광층광석중δ(34S)분포범위위 -1.5‰~+15.9‰,평균위 +7.6‰,N(32S)/N(34S)치위22,거차추단성광물질응래자지각심부,여양각부충작용유관.주요금속류화물급기미량원소화류동위소조성특정표명광상류형위화산성인괴상류화물광상,즉VMS광상.
A series of blocklike pyritic copper deposits are developed in the epimetamorphic athrogenic rock in Longmen Mountain of Chuanxi area(western Sichuan),where ore-bearing rocks are formed in island arc tectonic environment. The pyrite amounts to nearly 90% of whole metallic minerals, with the content of chalcopyrite varing from 0.8% to 3% and sphalerite from 1%-4%. The main elements of mineral are Fe, S,Z, Cu, and Mn, and sub-elements are Ag, Au, Pb, Se, Cd, Ga, Ti, V, Co, etc. The ratio of δ(34S) spreading each layer ranges from -1.5‰ to +15.9‰ with the average occupation +7.6‰ and the ratio of 32S/34S 22. It can be concluded from the finding above that the elements are mainly sourced the deep earth's crust, about the subduction area of the oceanic crust.The main metallic sulphide and its trace elements and sulfur isotope formation character show that the mineral belongs to massive sulfide deposit formed by volcano--the VSM.