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地质学报  2005 

广西大厂锡多金属矿田亢马矿床地质特征及成矿时代

, PP. 262-268

Keywords: 大厂锡多金属矿田,亢马矿床,矿床特征,成矿作用,成矿时代

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Abstract:

亢马矿床是广西大厂锡多金属矿田东矿带中一个研究程度较低的中型锡多金属矿床。矿床特征研究表明,区内的锡多金属矿化主要呈脉状产出,明显受构造控制,成矿作用以充填-交代为主,后生成矿作用特征明显。成矿作用可分为3个阶段,各阶段的完全均一温度分别为300~350℃、210~280℃、145~175℃。石英流体包裹体Rb-Sr测年获得等时线年龄为94.1±2.7Ma(2σ),表明成矿时代属燕山晚期,成矿流体的87Sr/86Sr初始值为0.71015,与大厂矿田中部龙箱盖黑云母花岗岩87Sr/86Sr的初始值0.7110接近。成矿年龄与成矿流体的87Sr/86Sr初始值均表明亢马锡多金属矿的成矿作用与区内的龙箱盖岩体具有一定的成生联系。

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