CAJ | 학술논문

新华龙钼矿床位于中国东北地区吉林省东部，是一个新发现的斑岩型钼矿床。矿床产于花岗闪长斑岩中。矿床成矿阶段包括石英浸染状辉钼矿、石英网脉状辉钼矿、石英黄铁矿黄铜矿、石英多金属硫化物和石英碳酸盐化5个阶段。流体包裹体实验结果表明：流体包裹体的类型主要为气液两相包裹体，其次为纯气相和纯液相包裹体，还有少量含子矿物的多相包裹体。流体包裹体的均一温度为172～385℃，盐度（w（NaCl））为8．51％～45．44％。从早阶段到晚阶段成矿流体温度具有规律的演化，均一温度分别为360～390℃、270～350℃、250～260℃、220～230℃、170～190℃。其中：含子矿物多相包裹体均一温度为272～385℃，盐度为35．79％～45．44％，密度为1．07～1．08 g/cm3；气液两相包裹体均一温度为172～381℃，盐度为8．51％～23．36％，密度为0．70～0．99 g/cm3。激光拉曼光谱分析表明，包裹体的气体成分主要为 CO2、H2 O、N2和 CH4。包裹体岩相学及测温表明，流体由早期的高温、高盐度、含二氧化碳的含矿流体在主成矿阶段发生流体包裹体的沸腾、CO2逸出、温度降低等过程，导致大量金属硫化物沉淀。结合氢氧同位素特征，初步确定该矿床的成矿流体主要以岩浆水为主，后期有大气水的加入。流体沸腾是新华龙钼矿床成矿的重要机制。
신화룡목광상위우중국동북지구길림성동부，시일개신발현적반암형목광상。광상산우화강섬장반암중。광상성광계단포괄석영침염상휘목광、석영망맥상휘목광、석영황철광황동광、석영다금속류화물화석영탄산염화5개계단。류체포과체실험결과표명：류체포과체적류형주요위기액량상포과체，기차위순기상화순액상포과체，환유소량함자광물적다상포과체。류체포과체적균일온도위172～385℃，염도（w（NaCl））위8．51％～45．44％。종조계단도만계단성광류체온도구유규률적연화，균일온도분별위360～390℃、270～350℃、250～260℃、220～230℃、170～190℃。기중：함자광물다상포과체균일온도위272～385℃，염도위35．79％～45．44％，밀도위1．07～1．08 g/cm3；기액량상포과체균일온도위172～381℃，염도위8．51％～23．36％，밀도위0．70～0．99 g/cm3。격광랍만광보분석표명，포과체적기체성분주요위 CO2、H2 O、N2화 CH4。포과체암상학급측온표명，류체유조기적고온、고염도、함이양화탄적함광류체재주성광계단발생류체포과체적비등、CO2일출、온도강저등과정，도치대량금속류화물침정。결합경양동위소특정，초보학정해광상적성광류체주요이암장수위주，후기유대기수적가입。류체비등시신화룡목광상성광적중요궤제。
The Xinhualong molybdenum deposit,located in the eastern Jilin Province,is a newly discovered porphyry deposit. The orebodies are mainly hosted in granodiorite-porphyry. The hydrothermal ore-forming processes can be divided into five stages:quartz-disseminated molybdenite, quartz-stockwork molybdenite, quartz-pyrite-chalcopyrite, quartz-polymetallic sulfides, quartz-carbonate.Some conclusions have been drawn through petrographic observation of fluid inclusions in this deposit:there are mainly gas liquid two-phase (L+V)inclusions,subordinately pure gas (V)and pure liquid inclusions (L),and minor daughter minerals bearing multiphase inclusions (L+V+S).The homogenization temperatures of fluid inclusions regularly change from the early stage to the late stage. The homogenization temperatures and salinities of fluid inclusions ranges from 172 385 ℃,and from 8.51% 45.44%,respectively.The peak values of homogenization temperatures of fluid inclusions formed in different stages are separately 360 390 ℃,270 350 ℃,250 260 ℃,220 230 ℃,170 190 ℃.The homogenization temperatures of daughter minerals bearing inclusions mainly range from 272 385 ℃,salinities from 35.79% 45.44%,and densities from 1.07 1.08 g/cm3 respectively.Gas liquid two-phase inclusions are mainly in ranges of 172 381 ℃,8.51% 23.36%,and 0.7 0.99 g/cm3 respectively.Laser Raman spectroscopy of inclusions indicate that the gas components are CO2 ,H 2 O, N2 and CH4 .Petrographic and microthermometric studies indicate that the ore-forming fluid of the first and the second stage,with high temperature,high salinities,CO2-bearing,took place boiling.The fluid boiling resulted in CO2 escaping,temperature decreasing and abundant metal sulfides precipitating. Moreover,data of oxygen and hydrogen isotope indicate that the ore-forming hydrothermal fluid was dominated by magmatic water with mixing of meteoric water in the later stage,and the mechanism for ore-metals precipitation is fluid-boiling.