本文選題：黑龍江高松山 + 低硫型淺成低溫熱液金礦　； 參考：《中國地質(zhì)大學(北京)》2015年碩士論文

【摘要】：高松山金礦床位于黑龍江省遜克縣東南部,是小興安嶺-張廣才嶺成礦帶上的典型金礦床之一,礦床規(guī)模達到大型。本文在充分收集整理前人研究資料的基礎上,通過野外調(diào)研查明該礦床的成礦地質(zhì)背景與礦床地質(zhì)特征,并對成礦階段進行了劃分,運用全巖主微量測試、單礦物稀土元素測試、穩(wěn)定同位素分析、流體包裹體測試等研究方法,重點對該礦床容礦火山巖形成環(huán)境、成礦流體特征、成礦流體來源、成礦物質(zhì)來源等進行研究,在此基礎上對礦床成因與成礦機制進行探討,并取得了如下成果:高松山金礦床容礦圍巖是下白堊統(tǒng)板子房組安山巖、玄武安山巖與安山質(zhì)火山角礫巖,礦體嚴格受斷裂構(gòu)造控制,賦存在沙阿其河斷裂的NWW、NEE、近EW向次級斷裂中,礦石類型以構(gòu)造角礫巖型和強硅化型礦石為主。圍巖蝕變主要是硅化與方解石化,以及冰長石化、絹云母化、伊利石化等,礦化主要是硅化與黃鐵礦化。成礦流體具有低溫(168℃~325℃)、低鹽度(1.05-4.18wt%Na Cleq)的特征,為一典型的低硫型淺成低溫熱液礦床。成礦作用可劃分為4個階段,分別是:階段1:絹云母-黃鐵礦-閃鋅礦階段;階段2:灰白色細晶至玉髓狀石英-絹云母-黃鐵礦-閃鋅礦階段;階段3:乳白色石英-伊利石-冰長石-黃鐵礦-黃銅礦階段;階段4:網(wǎng)脈狀、團塊狀方解石-黃銅礦-方鉛礦階段。其中,成礦第2、3階段Au大量沉淀析出,為主成礦階段。氫、氧、碳同位素特征研究表明成礦流體為大氣降水補給的地下熱水與巖漿流體共同組成的混合流體,并以大氣降水補給的地下熱水為主。硫同位素組成以及礦石微量元素特征研究表明容礦火山巖并非成礦物質(zhì)的唯一來源,存在其他端元與火山巖一同為成礦作用提供必要的物質(zhì)來源。沸騰作用是引起成礦流體中礦質(zhì)沉淀富集的主要成礦機制。礦床形成于板子房組火山巖的火山噴發(fā)作用晚期,成礦環(huán)境與中生代晚期古太平洋板塊的持續(xù)俯沖作用所引發(fā)的加厚的巖石圈發(fā)生拆沉、伸展和減薄作用關系密切。
[Abstract]:The high Songshan gold deposit, located in the southeastern part of the county of Heilongjiang Province, is one of the typical gold deposits in the small Xingan Ling Zhang Guang Jill metallogenic belt, and the size of the deposit has reached a large scale. On the basis of the study on the formation environment of the ore bearing volcanic rocks, the characteristics of the ore-forming fluid, the source of ore-forming fluid and the source of the ore-forming materials, the origin of ore deposits and the metallogenic mechanism of the ore are put forward on the basis of the study of the study methods of the total rock main trace test, the single mineral rare earth element test, the stable isotope analysis and the fluid inclusion test. The results are as follows: the surrounding rock of the gold deposit in the high Songshan gold deposit is andesite in the lower Cretaceous plate formation, basalt andesite and Anshan volcanic breccia, and the ore body is strictly controlled by the fault structure, and the NWW, NEE, and near EW secondary faults exist in the Shah He River fault, and the ore type is composed of tectonic breccia type and strong silicified ore type. The main alteration of surrounding rock is silicification and calicization, as well as ice long petrification, sericite and illite, and the mineralization is mainly silicification and pyrite mineralization. The mineralization fluid is characterized by low temperature (168 ~325 C) and low salinity (1.05-4.18wt%Na Cleq), which is a typical low sulfur type epithermal deposit. The mineralization can be divided into 4 stages. Stage 1: sericite - pyrite sphalerite stage; stage 2: gray white fine grain to chalcedony quartz - sericite - pyrite - sphalerite stage; stage 3: milky white quartz - illite - plyite - pyrite - chalcopyrite stage; stage 4: network pulse, block calcite - chalcopyrite - galena stage. Among them, Au heavy precipitation in the 2,3 stage of mineralization. The study on the characteristics of hydrogen, oxygen and carbon isotopes indicates that the ore-forming fluid is a mixture of underground water and magmatic fluids recharged by atmospheric precipitation, which is mainly the underground hot water recharged by atmospheric precipitation. The study of sulfur isotopes and trace elements of ore indicates that the ore bearing volcanic rocks are not minerals. The only source is the existence of other endpoints and volcanic rocks to provide the necessary material source for the mineralization. The boiling effect is the main metallogenic mechanism for the mineralization and enrichment of ore-forming fluids. The deposit is formed in the late stage of volcanic eruption of the volcanic rocks of the plate formation of the plate, and the metallogenic environment and the continuous subduction of the Paleozoic Pacific plate in Late Mesozoic. The thickening of the lithosphere induced by the action is closely related to the delamination, extension and thinning.

【學位授予單位】：中國地質(zhì)大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.51

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