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矿床地质  2011 

山东乳山金矿床流体包裹体爆裂曲线特征及其找矿意义

Keywords: 地球化学,流体包裹体,爆裂法,蒸发晕负异常,乳山金矿,山东半岛

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Abstract:

流体包裹体爆裂法作为一种辅助找矿手段,可用于找矿勘探实践中。文章通过对山东半岛乳山金青顶石英脉型金矿花岗岩围岩、蚀变岩石和含金石英脉采样和分析,发现花岗岩围岩石英的爆裂曲线具有高的爆裂频次,起爆温度接近300℃,在大约360~450℃和573℃(α-石英/β-石英相变温度)分别有明显宽的爆裂峰和窄的尖锐爆裂峰;而含金石英脉的爆裂频次、爆裂峰强度和相变峰高相应降低,从而围绕矿体构成蒸发晕负异常;虽然这不同于以往的研究结果,即:围绕矿床出现蒸发晕正异常,但对于胶东地区金矿找矿勘探工作仍具有一定的应用价值。

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