南岭地区中生代主要成锡花岗岩地质地球化学特征与锡矿成矿规律:《华南地质与矿产》2005年02期

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南岭地区中生代主要成锡花岗岩地质地球化学特征与锡矿成矿规律

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c/i%Vuk m*Z7PJ ]0【摘要】:南岭中生代成锡花岗岩系花岗质岩浆多期或多阶段侵位和结晶的产物。空间上往往集中成群成带分布,构成多个复式岩基,明显受华夏和扬子两大地块接合部NE向深大断裂及NW向隐伏深大断裂的控制;中生代成锡花岗岩主要侵位于燕山期,成矿作用主要有两期,一是早期矽卡岩化导致锡的初步富集,二是晚期岩浆热液叠加形成了工业锡矿床。锡成矿作用与燕山期伸展背景下的大规模花岗岩浆活动密切相关。水利论文@F8cw.Z |.aef V

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宜昌地质矿产研究所 宜昌地质矿产研究所

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p~jJ|I+p0燕山期花岗岩 锡矿床 成矿规律 南岭

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;Heo8ES BRi0【基金】:中国地质调查局国土资源大调查项目(121201033090).水利论文5|/u4EOb4tJ

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%FFQU+j ~%Z&Q01花岗岩时空分布南岭中生代成锡花岗岩分布十分广泛,空间上往往集中成群成带分布,构成多个复式岩基,其中重要的有都庞岭、花山、姑婆山、金鸡岭、大东山、骑田岭、九峰山、大义山、塔山、锡田等(图1)。这些复式岩基分布明显受华夏和扬子两大地块接合部NE向深大断裂及NW向隐伏

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