国家自然科学基金资助项目40827002,41204054;中南大学庄胜矿业研究院秘鲁-厄瓜多尔地质调查项目及International Minerals Corporation联合资助Projects40827002,41204054 supported by the National Natural Science Foundation of China;Geological Survey Projects of Institute of Zhuangsheng Mining,Central South University and International Minerals Corporation