本文關(guān)鍵詞：豫西熊耳山地區(qū)上道回鉬礦床地質(zhì)及流體包裹體研究　出處：《現(xiàn)代地質(zhì)》2016年02期 　論文類型：期刊論文

  更多相關(guān)文章： 上道回鉬礦 鉀長石-石英脈型 地質(zhì)特征 流體包裹體 熊耳山地區(qū) 豫西

【摘要】：上道回鉬礦床位于華北克拉通南緣豫西熊耳山—外方山地區(qū),受控于馬超營斷裂的次級斷裂,賦礦地層為中元古界熊耳群中酸性火山巖,礦體呈多組脈狀產(chǎn)出。金屬礦物以輝鉬礦、黃鐵礦為主,熱液蝕變?yōu)楣杌�、鉀長石化、碳酸鹽化。熱液成礦過程從早到晚為石英-黃鐵礦階段、石英-輝鉬礦-多金屬硫化物階段、石英-方解石階段。包裹體類型為C型(CO2型)、W型(Na Cl-H2O型)、S型(子晶型)。早階段發(fā)育W型、C型和少量S型包裹體,中階段發(fā)育C型、W型、S型包裹體,晚階段發(fā)育W型包裹體。包裹體均一溫度為210~390℃、180~300℃、120~220℃,鹽度由早階段1.0%~13.4%和27.2%~33.2%,經(jīng)中階段0.3%~14.1%和27.3%~28.5%,到晚階段0.1%~14.2%。成礦流體由富CO2向貧CO2演化,流體沸騰使CO2等揮發(fā)分逃逸,造成流體p H值升高、氧化性降低,從而導(dǎo)致輝鉬礦等硫化物沉淀。早、中階段C型包裹體的捕獲壓力為148~371 MPa、108~383 MPa,對應(yīng)的成礦深度為5~14 km。
[Abstract]:The Shangdaohui molybdenum deposit is located in Xiong 'ershan-Waifangshan area of western Henan on the southern margin of North China Craton, controlled by the secondary faults of Machaoying fault and hosted by intermediate-acid volcanic rocks of Xionger Group of the Middle Proterozoic. The orebodies are formed in multiple veins. Molybdenum and pyrite are the main metal minerals, hydrothermal erosion becomes silicification, kalitization and carbonization. The hydrothermal metallogenic process is quartz pyrite stage from early to late. Quartz-molybdenum polymetallic sulfide stage, quartz-calcite stage. The inclusion type is C-type CO _ 2 _ 2 _ (W) _ (Na _ (Cl-H2O)). Type S (subcrystalline type). W type C type and a few S type inclusions are developed in the early stage and C type W type / S type inclusions are developed in the middle stage. W type inclusions are developed in the late stage. The homogenization temperature of inclusions is 210 ~ 390 鈩，

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