CAJ | 학술논문

河南省金城金矿床位于桐柏-商城韧性剪切带南部、大别山西北侧。矿床赋存于中元古界苏家河群浒湾岩组变质岩中。在详细分析金城金矿床地质特征的基础上，研究共生花岗斑岩脉的微量元素、稀土元素地球化学特征，共生石英的氧同位素、共生石英流体包裹体中CO2的碳同位素及共生黄铁矿的硫、铅同位素组成特征，并与老湾金矿和燕山晚期灵山花岗岩体对比。研究发现，本区花岗斑岩脉的稀土配分曲线和微量元素蛛网图与灵山花岗岩体几乎完全重叠，稀土元素和微量元素特征参数较为一致，结合区域资料推断本区与矿体共生的花岗斑岩脉来源于燕山晚期岩浆活动。黄铁矿δ34 S值变化范围为-6.9‰～5.5‰，均值为2.3‰，与区域上地层和岩浆岩硫同位素对比，认为金城矿床载金黄铁矿的硫主要来源于浒湾岩组围岩。载金黄铁矿铅同位素和浒湾岩组地层铅同位素范围相当，均有下地壳铅源的特征，结合硫同位素分析，认为金城金矿床载金黄铁矿的铅主要来源于浒湾岩组围岩。δ18 OSMOW变化范围为5.5‰～11.4‰，极差为5.9‰，均值为8.4‰，具有岩浆热液石英的特征；δ18 CPDB变化范围为-6.3‰～-2.8‰，极差为3.5‰，均值为-4.4‰，具有岩浆源或深部源碳（-7‰）和沉积碳酸盐岩来源碳（0）混合的特征；综合研究表明，本矿床成矿物质主要来源于浒湾岩组含金岩石建造，部分来源于燕山晚期岩浆热液活动。
하남성금성금광상위우동백-상성인성전절대남부、대별산서북측。광상부존우중원고계소가하군호만암조변질암중。재상세분석금성금광상지질특정적기출상，연구공생화강반암맥적미량원소、희토원소지구화학특정，공생석영적양동위소、공생석영류체포과체중CO2적탄동위소급공생황철광적류、연동위소조성특정，병여로만금광화연산만기령산화강암체대비。연구발현，본구화강반암맥적희토배분곡선화미량원소주망도여령산화강암체궤호완전중첩，희토원소화미량원소특정삼수교위일치，결합구역자료추단본구여광체공생적화강반암맥래원우연산만기암장활동。황철광δ34 S치변화범위위-6.9‰～5.5‰，균치위2.3‰，여구역상지층화암장암류동위소대비，인위금성광상재금황철광적류주요래원우호만암조위암。재금황철광연동위소화호만암조지층연동위소범위상당，균유하지각연원적특정，결합류동위소분석，인위금성금광상재금황철광적연주요래원우호만암조위암。δ18 OSMOW변화범위위5.5‰～11.4‰，겁차위5.9‰，균치위8.4‰，구유암장열액석영적특정；δ18 CPDB변화범위위-6.3‰～-2.8‰，겁차위3.5‰，균치위-4.4‰，구유암장원혹심부원탄（-7‰）화침적탄산염암래원탄（0）혼합적특정；종합연구표명，본광상성광물질주요래원우호만암조함금암석건조，부분래원우연산만기암장열액활동。
The Jincheng gold deposit,in the Luoshan County,Henan Province,lies in south of Tongbai-Shangcheng ductile shear zone.The ore deposit,which occurs in the east side of Lingshan granitic mass,is hosted in the lower stratum of Huwan formation complex in the upper Proterozoic.Based on the geologic feature, we conducted the comparative study on REE and trace element characteristics of granite-porphyry dyke and Lingshan granitic mass,moreover we further investigated the oxygen isotope compositions of the paragenous quartz and the carbon isotope compositions of fluid inclusions within paragenous quartz,as well as the sulfur and lead isotope compositions of the paragenous pyrite.We found that the REE and trace element characteristics of granite-porphyry dyke is similar to those of the Lingshan granitic mass,and that the granite-porphyry dyke origi-nated in the magmatic hydrothermal activities in the late Yanshanian stage.The δ34 S value of pyrite in the main orebody ranges from -6.9‰ to +5.5‰with a mean of +2.3‰.The lead isotope composition show the typi-cal characteristics of the lower crust lead isotope,similar to those of Huwan formation complex.Theδ18 O values in the ore range from +5.5‰ to +1 1.4‰ with a mean of +2.3‰;the δ13 CCO2PDB values of fluid inclusions within paragenous quartz range from +6.3‰ to +2.8‰ with a mean of +4.4‰.The δ18 O-δ13 C results sug-gest that ore fluids mainly came from magmatic hydrothermal fluids with participation of small amounts of atmos-pheric water.According to our research,we consider that the ore-forming materials are mainly derived from the Huwan formation complex,and secondly derived from the magmatic hydrothermal activities in the late Yans-hanian stage.