本文關鍵詞：延邊地區(qū)五鳳-五星山金礦床成礦流體與成礦作用研究　出處：《礦床地質》2016年02期 　論文類型：期刊論文

  更多相關文章： 地球化學 流體包裹體 流體演化 成礦作用 五鳳-五星山金礦床 延邊地區(qū)

【摘要】：五鳳-五星山金礦床是延邊地區(qū)重要的金礦床類型之一。五鳳金礦床、五星山金礦床位于石人火山斷陷盆地的南北端,相距近3 km。五鳳礦體產(chǎn)在金溝嶺組火山巖內(nèi),為脈狀,五星山礦體產(chǎn)在堿性花崗巖與次粗面安山巖接觸帶上,為網(wǎng)脈-浸染狀。筆者運用顯微測溫、激光拉曼探針技術,對礦床中各個礦化階段石英內(nèi)的流體包裹體進行研究。實驗結果表明:1流體包裹體類型主要為氣液兩相包裹體,純液相包裹體,少量含CO_2三相的包裹體;2均一溫度變化范圍在110~440℃之間,與石英脈階段(Ⅰ)、含硫化物-石英脈階段(Ⅱ)、方解石石英脈階段(Ⅲ)以及方解石-沸石階段(Ⅳ)4個礦化蝕變階段相對應的流體包裹體的均一溫度分別為440~350℃、340~220℃、220~160℃、160~110℃;3鹽度w(NaCleq)變化在0.53%~9.47%之間,Ⅰ、Ⅱ、Ⅲ、Ⅳ礦化階段成礦流體的鹽度w(Na Cleq)分別為2.23%~4.63%、9.47%~2.88%、3.85%~1.21%和0.87%左右;4氣體成分主要為H_2O、CO_2,少量H_2S、CH_4、N_2。上述結果和硫、碳、氫氧同位素數(shù)據(jù),與成礦有關的巖漿作用研究成果,表明該礦床為低硫化型淺成低溫熱液金礦床,初始成礦流體為大氣水,有少量巖漿水參與的中低溫、低鹽度,還原性流體,成礦物質源于殼幔相互作用的安山質巖漿,成礦機制為流體沸騰作用,可能伴有部分圍巖的硫化作用。
[Abstract]:Wufeng - wuxingshan gold deposit is one of the important types of gold deposits in Yanbian area. Wufeng wuxingshan gold deposit, the gold deposit is located in the volcano rift basin north and south end, are nearly 3 km. orebody in Wufeng Jingouling volcano rock group, vein, wuxingshan orebodies in alkaline granite and rough andesite contact belt, net vein disseminated. The author uses the micro thermometry, laser Raman microprobe technique, research on fluid inclusions of different mineralization stage in quartz deposits. The experimental results show that 1 types of fluid inclusions are gas-liquid inclusion, pure liquid inclusions and inclusions containing a small amount of CO_2 three phase; 2 homogenization temperature changes in the range of 110~440 DEG, and the quartz vein stage (I), containing sulfide quartz vein stage (II), (III) calcite quartz vein stage and calcite zeolite phase (IV) 4 mineralization stages corresponding to the The homogenization temperature of fluid inclusions are 440~350 degrees, 340~220 degrees, 220~160 degrees, 160~110 degrees; 3 W salinity (NaCleq) changes between 0.53%~9.47%, I, II, III, IV w salinity of ore-forming fluid mineralization stage (Na Cleq) were 2.23%~4.63%, 9.47%~2.88%, 3.85%~1.21% and 0.87% of the 4 gas component; mainly for H_2O, CO_2, CH_4, N_2. and a small amount of H_2S, and the results of sulfur, carbon, hydrogen and oxygen isotope data, research results of magmatism and mineralization of the deposit, shows that the low sulfide epithermal gold deposit, the ore-forming fluid is the initial atmospheric water, a low temperature, a small amount of magmatic water in low salinity, reducing fluid, metallogenic material derived from crust mantle interaction in andesitic magma, the mineralization mechanism for fluid boiling, vulcanization may be accompanied by a part of the surrounding rock.

【作者單位】： 長春工程學院;吉林大學地球科學學院;
【基金】：國家自然科學基金(批準號:40472050;40772052) 省科技廳項目(批準號:20160520083JH) 校青年基金項目(批準號:320130026)資助
【分類號】：P618.51
【正文快照】： 淺成低溫熱液金礦床是世界上最重要的金礦床類型之一,也是國際礦床學研究的熱點。目前常將淺成低溫熱液金礦床分為低硫化型和高硫化型兩類。近年來,環(huán)太平洋地區(qū)發(fā)現(xiàn)了大量的淺成低溫熱液型金礦床。延邊地區(qū)位于中國東部陸緣,屬于太平洋成礦域的一部分,該區(qū)亦發(fā)育淺成熱液型、

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