| 陕西勉县后沟-大坪山矿区磷、锰分层成矿地质地球化学特征 |
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| 引用本文： | 乔耿彪,杨钟堂,李智明,杨晓勇.陕西勉县后沟-大坪山矿区磷、锰分层成矿地质地球化学特征[J].西北地质,2009,42(4):37-45. |
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| 作者姓名： | 乔耿彪 杨钟堂 李智明 杨晓勇 |
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| 作者单位： | 1. 西安地质矿产研究所,陕西,西安,710054
2. 中国科学技术大学地球和空间科学学院,安徽,合肥,230026 |
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| 基金项目： | 国土资源部资源补偿费项目和中央地质勘查基金试点项目 |
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| 摘 要： | 后沟-大坪山矿区位于南秦岭磷、锰成矿带的中东段,近年来在下寒武统塔南坡组中发现了3条含磷、锰矿化带,并圈定出多个锰矿体和磷矿体。磷、锰矿体具有多层性,常表现为磷、锰的分层成矿,多呈上锰下磷的空间分布特征。通过分析Ⅱ矿化带内地表和深部样品的常量元素、微量元素和稀土元素的地球化学特征,发现磷、锰矿其物质来源具有一定的相似性,但是磷、锰矿石沉积的氧化-还原条件、沉积区域以及沉积水体条件都存在差别,这可能是引起磷、锰分离单独成矿的主要原因。
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| 关 键 词： | 后沟-大坪山矿区 磷锰矿 分层成矿 地球化学 |
Geological and Geochemical Characteristics of P and Mn Layering Mineralization of Hougou-Dapingshan Area in Mianxian, Shaanxi Province |
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| QIAO Geng-biao,YANG Zhong-tang,LI Zhi-ming,YANG Xiao-yong.Geological and Geochemical Characteristics of P and Mn Layering Mineralization of Hougou-Dapingshan Area in Mianxian, Shaanxi Province[J].Northwestern Geology,2009,42(4):37-45. |
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| Authors: | QIAO Geng-biao YANG Zhong-tang LI Zhi-ming YANG Xiao-yong |
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| Institution: | QIAO Geng-biao, YANG Zhong-tang, LI Zhi-ming, YANG Xiao-yong Xi＇an Institute of Geology and Mineral Resources, Xi＇an 7100541, China; 2. School of Earth and Space Sciences, University of Sciences and Technology of China, Hefei 230026, China) |
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| Abstract: | Hougou-Dapingshan area,where three manganese（Mn）-phosphor（P） metallogenic belts were discovered recently in Lower Cambrain Tananpo Formation,located in the middle-eastern segment of the South Qinling Mn-P Metallogenic Zone.There were four Mn orebodies and one P orebody in the Ⅱ metallogenic belts.It is often that Mn-P orebodies were separated with a texture of upper Mn seam and lower P seam.The geochemical characteristics of the surface and deep rocks samples of major trace elements from the Ⅱmetallogenic belts were analyzed. The results show that the material source of Mn-P orebodies is similar, but both sedimentary environment including the sedimentary redox conditions, sedimentary area and water body condition is different. These are possible major reasons for P and Mn separate layering mineralization. |
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| Keywords: | Hougou-Dapingshan area P and Mn deposits layering mineralization geochemistry |
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