| 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 |
| 重庆高燕锰矿床含锰碳酸盐岩稀土元素特征 |
| REE characteristics of Mn-bearing carbonate rocks in Gaoyan manganese deposit, Chongqing |
| 投稿时间：2015-11-16 修订日期：2016-02-14 |
| DOI：10.6053/j.issn.1001-1412.2017.03.003 |
| 中文关键词: 高燕锰矿床 稀土元素特征 含锰碳酸盐岩 成矿环境 重庆市 |
| 英文关键词:characteristics of REE Mn-bearing carbonate ore-forming environment Gaoyan manganese deposit Chongqing |
| 基金项目:重庆市国土资源与房屋管理局项目（编号：SHG012）资助。 |
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| 中文摘要: |
| 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。CeS<10在本区具有示矿作用。 |
| 英文摘要: |
| 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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