本文選題：流體包裹體 + 火山熱液礦床��； 參考：《地質科技情報》2017年05期

【摘要】：瑪浪勒銅礦床位于西藏仲巴縣隆格爾鄉(xiāng),大地構造位置屬于措勤-申扎火山巖漿弧。礦體呈脈狀產于灰?guī)r與則弄群安山巖及安山質晶屑凝灰?guī)r的接觸帶及其附近。基于礦床野外地質特征、室內巖礦鑒定以及流體包裹體顯微測溫的研究表明:瑪浪勒銅礦床至少存在2個階段的成礦作用,即方解石-硫化物階段和后期地下水熱液疊加改造階段。石英和方解石主要發(fā)育富液相的氣液兩相包裹體,其中,方解石-硫化物成礦階段的包裹體均一溫度為177~271℃,鹽度w(NaCl_(eqv))為5.26%~20.37%;地下水熱液疊加改造階段的均一溫度為118~170℃,鹽度w(NaCl_(eqv))為1.91%~16.15%。成礦流體密度為0.90~1.07g/cm~3,估算成礦壓力為9.16~26.84 MPa,對應的成礦深度為0.92~2.68km�；谫x礦安山巖富集大離子親石元素、虧損高場強元素的地球化學特征分析表明,該礦床形成于班公湖-怒江特提斯洋南向俯沖的構造背景下,為與火山期后熱液相關的淺成低溫熱液礦床。區(qū)域該類型礦產勘查最新進展的綜合分析表明,在措勤-申扎火山巖漿弧上尋找與火山期后熱液相關銅礦床的潛力較大。
[Abstract]:The Malanle copper deposit is located in Longer Township, Zhongba County, Tibet. The tectonic location belongs to the Cuoqin-Shenza volcanic magmatic arc. The orebody occurs in the contact zone between limestone and Zelong group andesite and Anshan crystalline tuff. Based on the field geological characteristics of the deposit, the identification of indoor rock deposits and the microthermometry of fluid inclusions, it is shown that there are at least two stages of mineralization in the Malanle copper deposit. That is calcite-sulphide stage and late stage of groundwater hydrothermal superposition transformation stage. Quartz and calcite mainly develop liquid-rich gas-liquid two-phase inclusions, in which the homogenization temperature of inclusions in calcite and sulphide metallogeny stage is 177 鈩，

本文編號：1951791