世界地质(英文版)
世界地質(英文版)
세계지질(영문판)
GLOBAL GEOLOGY
2014年
3期
591-602
,共12页
孙珍军%李学源%于赫楠%孙国胜%朱继浩%陆丽娜%薛怀宇%苏蓉
孫珍軍%李學源%于赫楠%孫國勝%硃繼浩%陸麗娜%薛懷宇%囌蓉
손진군%리학원%우혁남%손국성%주계호%륙려나%설부우%소용
流体包裹体%激光拉曼测试%稳定同位素%金厂沟梁%内蒙古
流體包裹體%激光拉曼測試%穩定同位素%金廠溝樑%內矇古
류체포과체%격광랍만측시%은정동위소%금엄구량%내몽고
fluid inclusion%laser Raman testing%stable isotope%Jinchangouliang gold deposit%Inner Mon-golia
对金厂沟梁金矿床含金石英脉中流体包裹体进行了岩相学、显微测温、单个包裹体的激光拉曼测试以及O和S同位素组成等方面研究。结果表明,成矿流体气相成分主要为H2 O,属H2 O-NaCl体系,包裹体均一温度为148.7℃~352℃,盐度[ w ( NaCl )/%]为1.05%~5.99%。δ18 O值为-1.1‰~3.0‰,说明成矿流体继承了变质流体的特征,仍以岩浆水和后期大气降水为主;δ34 SV-CDT组成为0.6‰~4.3‰,平均值0.817‰,极差为3.1‰,表明成矿流体中的硫主要来自于幔源,其次为围岩。综合分析认为,金厂沟梁金矿床是在燕山晚期太平洋板块俯冲导致岩石圈的快速减薄、拆沉的拉张环境下形成的浅成造山型金矿。
對金廠溝樑金礦床含金石英脈中流體包裹體進行瞭巖相學、顯微測溫、單箇包裹體的激光拉曼測試以及O和S同位素組成等方麵研究。結果錶明,成礦流體氣相成分主要為H2 O,屬H2 O-NaCl體繫,包裹體均一溫度為148.7℃~352℃,鹽度[ w ( NaCl )/%]為1.05%~5.99%。δ18 O值為-1.1‰~3.0‰,說明成礦流體繼承瞭變質流體的特徵,仍以巖漿水和後期大氣降水為主;δ34 SV-CDT組成為0.6‰~4.3‰,平均值0.817‰,極差為3.1‰,錶明成礦流體中的硫主要來自于幔源,其次為圍巖。綜閤分析認為,金廠溝樑金礦床是在燕山晚期太平洋闆塊俯遲導緻巖石圈的快速減薄、拆沉的拉張環境下形成的淺成造山型金礦。
대금엄구량금광상함금석영맥중류체포과체진행료암상학、현미측온、단개포과체적격광랍만측시이급O화S동위소조성등방면연구。결과표명,성광류체기상성분주요위H2 O,속H2 O-NaCl체계,포과체균일온도위148.7℃~352℃,염도[ w ( NaCl )/%]위1.05%~5.99%。δ18 O치위-1.1‰~3.0‰,설명성광류체계승료변질류체적특정,잉이암장수화후기대기강수위주;δ34 SV-CDT조성위0.6‰~4.3‰,평균치0.817‰,겁차위3.1‰,표명성광류체중적류주요래자우만원,기차위위암。종합분석인위,금엄구량금광상시재연산만기태평양판괴부충도치암석권적쾌속감박、탁침적랍장배경하형성적천성조산형금광。
The authors studied the petrography and microthermometry on fluid inclusions from auriferous quartz in Jinchanggouliang gold deposit , including laser Raman microspectroscopic and oxygen isotope as well as sulphur isotope analyses , etc.The results show that the gas phase of ore-forming fluid is mainly composed of H 2 O, belonging to H 2 O-NaCl system . The fluid inclusion homogenization temperatures range from 148.7℃ to 352℃, and the salinities are between 1.05%-5.99%.The values of δ18 O vary from -1.1‰to 3.0‰, which indicates that ore-forming fluid inherits the characteristics of metamorphic fluid , while is still mainly dominated by the mag-matic water and meteoric waters added in later stage .Theδ34 SV-CDT ranges 0.6‰to 4.3‰in composition, with the mean as 0.817‰, and range as 3.1‰, indicating the sulfur in ore-forming fluid mainly came from the mantle source, and secondly from the surrounding rocks .In sum, the Jinchanggouliang gold deposit is a shallow orogenic gold deposit formed in the extensional environment caused by Pacific Plate's subduction leading to rapid thinning of the lithosphere and delamination in the late Yanshanian period .