| 谢华,伊海生,欧莉华,李勇,赵香玲,金峰,李启来.磁化率测量在沉积锰矿床中的应用[J].地质找矿论丛,2016,31(1):116-120 |
| 磁化率测量在沉积锰矿床中的应用 |
| Application of magnetic susceptibility measurement in sedimentary manganese deposits |
| 投稿时间：2014-12-12 |
| DOI：10.6053/j.issn.1001-1412.2016.01.015 |
| 中文关键词: 下雷锰矿 磁化率 含锰岩系 原生碳酸锰矿 碳酸盐岩 广西 |
| 英文关键词:Xialei manganese deposit susceptibility manganese-bearing sequence primary carbonate manganese ore Guangxi |
| 基金项目:"十二五"国家科技支撑计划课题项目(编号:2011BAB04B10)和国家自然科学基金项目(编号:4097208)联合资助。 |
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| 中文摘要: |
| 为研究磁化率在沉积锰矿床中的应用,对广西下雷锰矿床的钻孔岩心进行了磁化率测量试验。结果表明,含锰岩系中矿层磁化率与围岩磁化率明显不同,通常碳酸锰矿磁化率值比围岩要高出1~2个数量级,而围岩中硅质岩、灰岩、泥岩的磁化率无明显差异。磁化率可作为野外快速判别含锰岩系的代用指标。通过讨论下雷原生碳酸锰矿的磁化率异常,认为碳酸盐矿物磁性很低,对磁化率的贡献极小,磁化率异常高值指示与其伴生的铁质矿物;碳酸锰矿中含有磁性矿物,其磁性强弱决定了矿层磁化率的大小;黏土矿物中的绿泥石可吸附含铁的强磁性物质,绿泥石及其含量是影响碳酸锰矿磁化率的一个重要因素。 |
| 英文摘要: |
| In order to investigate the application of magnetic susceptibility in sedimentary manganese deposit susceptibility test measurement on the drill core of Xialei manganese deposit in Guangxi has been carried out. The results show that susceptibility of ore layer in the manganese-bearing sequence is obviously different from that of surrounding rocks. Generally, the susceptibility value of manganese carbonate ore is overtopping 1 to 2 order of magnitude compared with surrounding rocks, and there is no significant difference between the susceptibility value of siliceous rocks and limestone, or mudstone. This paper points out that susceptibility can be used as an index to rapidly distinguish manganese-bearing sequence in field. Details of Mn carbonate ore susceptibility anomly in Xialei manganese deposit show that carbonate minerals are magneticaly low and contribute very small to susceptibility , that high susceptibility anomly is indication of accompanying iron minerals, that high or low susceptibility of Mn ore depends on strong or weak magnetism of magnetic mineral s in the Mn carbonate ore, that chlorite absorbs Fe-bearing materials and its content is a key factor to influence susceptibility of Mn carbonate ore. |
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