...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Frontiers of earth science >Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific
【24h】

Geochemical characteristics and metal element enrichment in crusts from seamounts of the Western Pacific

机译：西太平洋海山地壳的地球化学特征和金属元素富集

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Elemental geochemistry is an essential part of understanding mineralization mechanisms. In this paper, a data set of 544 cobalt crust samples from seamounts of the Western Pacific are used to study the enrichment characteristics of metal elements. REE normalization is utilized to reveal the origin of the crusts; effects of water depth on Co enrichment and impacts of phosphatization on mineral quality are discussed to obtain the evolution of these marine mineral deposits, which gives support to further resource assessment. Conclusions are reached as follows: 1) Elemental abundances, inter-element relationships, and shale-normalized REE patterns for phosphatepoor crusts from different locations reflect hydrogenetic origin of the crusts. EFs (enrichment coefficients) of REE exhibit exponential increase from surface sediments to phosphorite to polymetallic nodules to crusts, suggesting that the improved degree of hydrogeneous origin induces the enrichment of REE. 2) The crusts in the Western Pacific, formed through hotspot produced guyots trails, have relatively lower REE than those in the Mid-Pacific. The latter could be attributed to the peculiar submarine topography of seamounts formed by intraplate volcanism. 3) The non-phosphatized younger crust layers have 40% higher Co than the phosphatized older layers. This indicates the modification of the elemental composition in these crusts by phosphatization. A general depletion of hydroxide-dominated elements such as Co, Ni, and Mn and enrichment of P, Ca, Ba, and Sr is evident in phosphatized crusts, whereas non-phosphatized younger generation crusts are rich in terrigenous aluminosilicate detrital matter. 4) Co increases above the carbonate compensation depth (CCD) from less than 0.53% to over 0.65% in seamount regions with water depth of less than 2,500 m, suggesting the significance of the dissolution of carbonate in the sea water column to the growth and composition of crusts.
机译：元素地球化学是理解矿化机制的重要组成部分。本文利用来自西太平洋海山的544个钴壳样品的数据集来研究金属元素的富集特征。 REE归一化被用来揭示地壳的起源。讨论了水深对钴富集的影响以及磷化对矿物质量的影响，以获取这些海洋矿物沉积的演化，为进一步的资源评估提供支持。得出以下结论：1）来自不同位置的磷贫壳的元素丰度，元素间关系和页岩标准化的REE模式反映了壳的氢成因。 REE的EFs（富集系数）从表层沉积物到磷矿到多金属结核再到地壳呈指数增长，表明氢源的改善程度引起REE的富集。 2）通过热点生产的古柏树痕迹形成的西太平洋地壳的稀土元素相对于中太平洋地区的稀土元素相对较低。后者可归因于板内火山作用形成的海山特殊的海底地形。 3）未磷酸化的年轻地壳层比磷酸化的较老层的Co高40％。这表明通过磷化作用使这些地壳中的元素组成发生了变化。磷化壳中普遍存在着以氢氧化物为主的元素（如Co，Ni和Mn）耗尽，P，Ca，Ba和Sr富集的现象，而未磷化的年轻一代壳则富含陆源硅铝酸盐碎屑物质。 4）在水深小于2500 m的海山地区，Co的碳酸盐补偿深度（CCD）以上从0.53％以下增加到0.65％以上，这表明碳酸盐在海水柱中的溶解对生长和生长具有重要意义。地壳的组成。

著录项

  • 来源
    《Frontiers of earth science》 |2016年第1期|171-182|共12页
  • 作者

    Zhang Xiaoyu; Zhu Kechao; Du Yong; Zhang Fuyuan; Zhang Weiyan; Ren Xiangwen; Jiang Binbin; Huang Dasong;

  • 作者单位

    Zhejiang Univ, Dept Earth Sci, Hangzhou 310012, Zhejiang, Peoples R China;

    Guangzhou Marine Geol Survey, Minist Land & Resources, Guangzhou 510760, Guangdong, Peoples R China;

    Zhejiang Univ, Dept Earth Sci, Hangzhou 310012, Zhejiang, Peoples R China;

    State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China|State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China;

    State Ocean Adm, Key Lab Submarine Geosci, Hangzhou 310012, Zhejiang, Peoples R China|State Ocean Adm, Inst Oceanog 2, Hangzhou 310012, Zhejiang, Peoples R China;

    State Ocean Adm, Inst Oceanog 1, Qingdao 266061, Peoples R China;

    Zhejiang Univ, Dept Earth Sci, Hangzhou 310012, Zhejiang, Peoples R China;

    Zhejiang Univ, Dept Earth Sci, Hangzhou 310012, Zhejiang, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    cobalt-rich crust; seamounts; Western Pacific; geochemical characteristics;

    机译：富钴结壳海山西太平洋西太平洋地球化学特征;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号