河南塔山萤石矿地球化学特征及成矿年龄
P595%P597; 为探究河南塔山萤石矿的成矿流体、成矿温度、成矿年龄及矿床成因,对研究区稀土元素、流体包裹体和Sm-Nd同位素特征进行了研究.研究区经历多期次的成矿作用,紫色萤石形成时间较早,紫色萤石成矿早期成矿流体中的稀土元素由吸附状态逐渐过渡到络合物状态,成矿晚期成矿流体中的稀土元素主要以络合物形式存在,为主成矿阶段,其球粒陨石标准化稀土元素配分模式和Y/Ho值与牛心山黑云母二长花岗岩、大理岩基本一致,指示三者之间有一定的成因联系.浅绿色萤石形成时间相对较晚,其与紫色萤石的稀土元素配分模式差异较大,表明二者具有不同成矿物质来源.塔山萤石矿发育气液两相包裹体,包裹体均一温度为143.6～...
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| Published in: | 地质与勘探 Vol. 59; no. 2; pp. 236 - 247 |
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| Main Authors: | , , , , , |
| Format: | Journal Article |
| Language: | Chinese |
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河南省地质矿产勘查开发局第二地质矿产调查院,河南郑州 450001
2023
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| Abstract | P595%P597; 为探究河南塔山萤石矿的成矿流体、成矿温度、成矿年龄及矿床成因,对研究区稀土元素、流体包裹体和Sm-Nd同位素特征进行了研究.研究区经历多期次的成矿作用,紫色萤石形成时间较早,紫色萤石成矿早期成矿流体中的稀土元素由吸附状态逐渐过渡到络合物状态,成矿晚期成矿流体中的稀土元素主要以络合物形式存在,为主成矿阶段,其球粒陨石标准化稀土元素配分模式和Y/Ho值与牛心山黑云母二长花岗岩、大理岩基本一致,指示三者之间有一定的成因联系.浅绿色萤石形成时间相对较晚,其与紫色萤石的稀土元素配分模式差异较大,表明二者具有不同成矿物质来源.塔山萤石矿发育气液两相包裹体,包裹体均一温度为143.6～168.5℃,盐度(NaCleqv)为7.02％ ～10.43％,密度为0.95～1.01 g/cm3;包裹体气-液相成分以H2 O为主,含有少量C2 H6,成矿流体属于低温、中低盐度、低密度的NaCl-H2O体系.测得的浅绿色萤石的成矿年龄为(141±13)Ma,为研究区萤石成矿年龄上限,推断研究区的成矿时代为早白垩世燕山期.综合分析认为,塔山萤石矿属于低温岩浆热液充填型矿床. |
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| AbstractList | P595%P597; 为探究河南塔山萤石矿的成矿流体、成矿温度、成矿年龄及矿床成因,对研究区稀土元素、流体包裹体和Sm-Nd同位素特征进行了研究.研究区经历多期次的成矿作用,紫色萤石形成时间较早,紫色萤石成矿早期成矿流体中的稀土元素由吸附状态逐渐过渡到络合物状态,成矿晚期成矿流体中的稀土元素主要以络合物形式存在,为主成矿阶段,其球粒陨石标准化稀土元素配分模式和Y/Ho值与牛心山黑云母二长花岗岩、大理岩基本一致,指示三者之间有一定的成因联系.浅绿色萤石形成时间相对较晚,其与紫色萤石的稀土元素配分模式差异较大,表明二者具有不同成矿物质来源.塔山萤石矿发育气液两相包裹体,包裹体均一温度为143.6～168.5℃,盐度(NaCleqv)为7.02％ ～10.43％,密度为0.95～1.01 g/cm3;包裹体气-液相成分以H2 O为主,含有少量C2 H6,成矿流体属于低温、中低盐度、低密度的NaCl-H2O体系.测得的浅绿色萤石的成矿年龄为(141±13)Ma,为研究区萤石成矿年龄上限,推断研究区的成矿时代为早白垩世燕山期.综合分析认为,塔山萤石矿属于低温岩浆热液充填型矿床. |
| Author | 苏阳艳 张凯涛 张志爽 张恒 白德胜 刘纪峰 |
| AuthorAffiliation | 河南省地质矿产勘查开发局第二地质矿产调查院,河南郑州 450001 |
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| Author_FL | LIU Jifeng ZHANG Kaitao ZHANG Zhishuang BAI Desheng SU Yangyan ZHANG Heng |
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| Keywords | 流体包裹体 塔山 河南 稀土元素 成矿年龄 萤石矿 |
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| Title | 河南塔山萤石矿地球化学特征及成矿年龄 |
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