CAJ | 학술논문

内蒙古花敖包特铅锌银多金属热液型脉状矿床位于大兴安岭成矿带中南段。结合其蚀变矿化特征，依据矿石矿物与脉石矿物的生成顺序，矿化阶段可划分为自形石英黄铁矿阶段、闪锌矿方铅矿阶段及他形黄铁矿毒砂阶段。流体包裹体研究表明：该矿床的成矿流体具有中-低温（146．7～274．3℃）、低盐度（w（NaCl）为0．54％～8．52％）及低密度（0．790～0．943 g/cm3）的特点；流体成矿压力及成矿深度估算结果表明，该矿床形成于中深浅成的环境。矿石中金属硫化物的硫、铅同位素分析结果显示，该矿床的成矿物质来源具有壳幔混合来源的特征。成矿流体氢、氧同位素组成：δ18 OSMOW 为-11．78‰～-6．01‰，δD 为-110．90‰～-70．30‰，表明该矿床的成矿流体主要由岩浆水与下渗的大气降水混合组成。结合区域地质特征及构造演化，认为该矿床是在大兴安岭南段中生代伸展造山构造背景下形成的受深断裂、早白垩世构造岩浆活动及寿山沟组多重地质因素控制的中低温热液型脉状铅锌银多金属矿床。
내몽고화오포특연자은다금속열액형맥상광상위우대흥안령성광대중남단。결합기식변광화특정，의거광석광물여맥석광물적생성순서，광화계단가화분위자형석영황철광계단、섬자광방연광계단급타형황철광독사계단。류체포과체연구표명：해광상적성광류체구유중-저온（146．7～274．3℃）、저염도（w（NaCl）위0．54％～8．52％）급저밀도（0．790～0．943 g/cm3）적특점；류체성광압력급성광심도고산결과표명，해광상형성우중심천성적배경。광석중금속류화물적류、연동위소분석결과현시，해광상적성광물질래원구유각만혼합래원적특정。성광류체경、양동위소조성：δ18 OSMOW 위-11．78‰～-6．01‰，δD 위-110．90‰～-70．30‰，표명해광상적성광류체주요유암장수여하삼적대기강수혼합조성。결합구역지질특정급구조연화，인위해광상시재대흥안령남단중생대신전조산구조배경하형성적수심단렬、조백성세구조암장활동급수산구조다중지질인소공제적중저온열액형맥상연자은다금속광상。
Huaaobaote Pb Zn Ag polymetallic deposit,a hydrothermal vein-type deposit,is tectonically located at the central and southern Daxinganling Mountains Metallogenic Belt. In combination with the alteration and mineralization characteristics, the paragenetic sequence of ore minerals and gangue minerals,the metallogenic stages could be divided into Quartz-Pyrite,Sphalerite-Galena and Arsenopyrite-Pyrite ones.By the study of fluid inclusions,it was shown that the ore-forming fluid are characterized by middle-low temperature (146.7 274.3℃),low salinity (0.54% 8.52%)and low density (0.790 0.943 g/cm3 ).The estimated metallogenic pressure and the metallogenic depth reflect that the deposit was formed in a mesogene-hypergene environment.With sulfur,lead isotopic analytical results of metal sulfides,it was shown that the source of ore-forming materials had the characteristics of a crust-mantle mixed source.Theδ18 OSMOW andδD of the ore-forming fluid range from-11.78‰ to -6.01‰ and from -110.90‰ to -70.30‰,respectively.It was concluded that the ore-forming fluid of the deposit was mainly derived from mixing of magmatic water and meteorite water.In combination with regional geological features and tectonic evolution,it is considered that this middle-low-temperature hydrothermal vein-type Pb Zn Ag polymetallic deposit was formed under the stretch orogenic structure system,among southern Daxinganling in the Mesozoic Era,and controlled by the multiple geological factors,such as deep faults,the Early Cretaceous tectonic-magmatic activities and the Shoushangou Group.