安徽兆吉口铅锌矿床微量及稀土元素地球化学特征与矿床成因探讨
Journal: Geological and Mineral Surveying and Mapping DOI: 10.32629/gmsm.v3i2.623
Abstract
兆吉口铅锌矿床是近年来江南过渡带新发现的大型铅锌多金属矿床,截止目前累计探明铅锌资源约50余万吨,矿体主要赋存在蓟县系环沙组变质粉砂岩中,矿石主要以脉状充填形式,呈脉状或团块状产出。研究表明：区内岩石、矿石中微量元素含量差异较大,相对富集Pb、Zn、Au、Cu、Ag、As、Cd、S、Sb等成矿与伴生元素；岩石、矿石样品稀土配分模式相似,δEu异常和Y/Ho比值均表明矿石与地层、岩浆岩之间存在继承关系,具有同源性。环沙组变质粉砂岩在成矿中起主导作用,提供了主要的金属和矿化剂元素,花岗闪长斑岩提供了促使成矿与伴生元素活化的热液。成矿热流体主要来自深部岩浆,成矿作用发生于低温高氧逸度的氧化环境,属浅成低温热液矿床。
Keywords
微量元素；稀土元素；成矿物质来源；矿床成因；兆吉口铅锌矿床
Funding
中国地质调查局地质调查项目《矿集区矿产调查及深部找矿预测(中国地质科学院地球物理地球化学勘查研究所)》,项目编号：DD20190571；《内蒙古黑鹰山地区矿产地质调查》,项目编号：DD20160040。
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[15] Anders E, Grevess N. Abundances of the elements Meteoritic and solar[J]. Geochim. Cosmochim. Acta, 1989, 53:197.
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[21] 庞奖励,孙根年,陈林.黑山热液型矿床稀土元素的地球化学行为[J].中国稀土学报,1999,17(2):157.
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