| 重庆高燕锰矿床含锰碳酸盐岩稀土元素特征 |
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| 引用本文： | 陈佳,朱明忠,董树义,张自贤,程文斌,曾敏,陈荣彬.重庆高燕锰矿床含锰碳酸盐岩稀土元素特征[J].地质找矿论丛,2017,32(3):367-374. |
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| 作者姓名： | 陈佳 朱明忠 董树义 张自贤 程文斌 曾敏 陈荣彬 |
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| 作者单位： | 1. 成都理工大学地球科学学院,成都,610059;2. 重庆地质矿产勘查开发局205地质队,重庆,404100 |
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| 基金项目： | 重庆市国土资源与房屋管理局项目 |
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| 摘 要： | 重庆城口高燕锰矿属于大型碳酸盐锰矿床。文章在系统野外地质调查及样品采集基础上,结合前人研究工作,采用等离子质谱仪(ICP-MS)分析了高燕矿区师家沟、板相沟及750平硐样品的稀土元素含量。分析结果显示,其稀土元素总量范围49.79×10~(-6)~281.24×10~(-6),平均含量125.92×10~(-6);轻重稀土比值范围1.79~3.58,显示轻稀土元素富集,且轻稀土元素之间的分馏程度高于重稀土元素;w(La)/w(Ce)=0.36~0.93,δEu=1.13~2.96,呈现弱正铕异常;δCe=2.09~5.84,有强的正铈异常。认为含锰碳酸盐岩形成于强还原的碱性环境沉积过程中,且有热水参与,成岩成矿的温度小于250℃,锰富集阶段处于滨岸的高能环境中。CeS10在本区具有示矿作用。
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| 关 键 词： | 高燕锰矿床 稀土元素特征 含锰碳酸盐岩 成矿环境 重庆市 |
| 收稿时间： | 2015/11/16 0:00:00 |
| 修稿时间： | 2016/2/14 0:00:00 |
REE characteristics of Mn-bearing carbonate rocks in Gaoyan manganese deposit, Chongqing |
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| CHEN Ji,ZHU Mingzhong,DONG Shuyi,ZHANG Zixian,CHENG Wenbin,ZENG Min and CHEN Rongbin.REE characteristics of Mn-bearing carbonate rocks in Gaoyan manganese deposit, Chongqing[J].Contributions to Geology and Mineral Resources Research,2017,32(3):367-374. |
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| Authors: | CHEN Ji ZHU Mingzhong DONG Shuyi ZHANG Zixian CHENG Wenbin ZENG Min and CHEN Rongbin |
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| Institution: | The College of earth science in Chengdu University of Technology, Chengdu 610059, China,The 205 geological team of Chongqing bureau of geology and mineral resources exploration, Chongqing 404100, China,The College of earth science in Chengdu University of Technology, Chengdu 610059, China,The 205 geological team of Chongqing bureau of geology and mineral resources exploration, Chongqing 404100, China,The College of earth science in Chengdu University of Technology, Chengdu 610059, China,The College of earth science in Chengdu University of Technology, Chengdu 610059, China and The College of earth science in Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | Gaoyan Mn deposit is a large carbonate rock type deposit.Previous results and ICP-MS analysis of samples systematically collected from Shijiagou,Banxianggou and adit 705 show that the total w (REE) is 49.79 × 10 6 ～281.24× 10-6,the average 125.92 × 10-6.w(LREE)/w(HREE) is 1.79～3.58,light REE enrichment,and higher fractionation of LREE than HREE,w(La)/w(Ce)=0.36～0.93,δEu =1.13～2.96,weak Eu anomaly,δCe is 2.09～5.84,strong positive cerium anomaly.We consider that manganese carbonate formed in strong reducing alkaline environment incorporated with hot water,the rock-forming and ore-forming temperature less than 250℃,the manganese enrichment under high-energy environment.Ces＜10 is indicator of ore in the district. |
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| Keywords: | characteristics of REE Mn-bearing carbonate ore-forming environment Gaoyan manganese deposit Chongqing |
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