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首页> 外文期刊>Journal of Geophysical Research, C. Oceans: JGR >Elemental and Sr-Nd Isotope Geochemistry of Sinking Particles in the Northern South China Sea: Implications for Provenance and Transportation
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Elemental and Sr-Nd Isotope Geochemistry of Sinking Particles in the Northern South China Sea: Implications for Provenance and Transportation

机译：南海北部沉没粒子的元素和SR-ND同位素地球化学：出处和运输的影响

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摘要

Major and trace elements, Sr and Nd isotopes of bulk particles from the SCS-NW and SCS-N-03 traps were studied to trace the provenance of sinking particles in the northern South China Sea (SCS). About 63% of biogenic materials and most of lithogenic materials from the SCS-NW trap may be contributed from resuspended sediments, and more biogenic materials are collected in winter than in summer. The immobile-element discrimination diagrams also indicate that the lithogenic materials of particles are, to a large degree, from local seafloor sediments, and that the lithogenic materials of particles from SCS-N and SCS-W traps have seasonal variations. Sr isotopes (Sr-87/Sr-86 and Sr-88) of bulk particles are significantly influenced by biogenic materials and cannot be used in provenance tracing. In contrast, Nd isotopes are ideal tools to trace particle provenance. However, the traditional Nd isotope (Nd-143/Nd-144) shows no statistical difference on the particles of the SCS-NW and SCS-N-03 traps, making it unable to identify their provenance. Fortunately, the stable Nd isotope, epsilon Nd-146, shows different correlation trends to epsilon Nd-143 in these two traps, suggesting that stable Nd isotope can potentially identify the sources of lithogenic materials in the northern SCS. Our results indicate that distribution and transportation of sinking particles are controlled by currents of the SCS mainly driven by the East Asian Monsoon.
机译：研究了来自SCS-NW和SCS-N-03陷阱的主要和痕量元素，SR和ND同位素来自SCS-NW和SCS-N-03陷阱，追踪南海（SCS）中沉没的粒子的出处。来自SCS-NW陷阱的约63％的生物材料和大多数型型型型型型型岩性材料可能是从重悬的沉积物中的贡献，并且在冬季收集更多的生物材料。固定元素的鉴别图还表明颗粒的型型粒子在很大程度上，来自局部海底沉积物，并且来自SCS-N和SCS-W陷阱的粒子的型型型颗粒具有季节性变化。散装颗粒的SR同位素（SR-87 / SR-86和SR-88）受到生物原料的显着影响，不能用于出种追踪。相比之下，ND同位素是追踪颗粒物质的理想工具。然而，传统的Nd同位素（ND-143 / ND-144）显示了SCS-NW和SCS-N-03陷阱的颗粒上没有统计差异，使其无法识别它们的出处。幸运的是，稳定的Nd同位素，εnsilonnd-146显示出在这两个陷阱中的εnd-143不同的相关趋势，表明稳定的Nd同位素可以识别北部SCS中型型岩性材料的来源。我们的结果表明，沉没颗粒的分布和运输是由东亚季风的主要驱动的SCS的电流控制。

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  • 作者

    Liu Xi; Wei Gangjian; Zou Jieqiong; Guo Yangrui; Ma Jinlong; Chen Xuefei; Liu Ying; Chen Jianfang; Li Hongliang; Zeng Ti;

  • 作者单位

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem State Key Lab Isotope Geochem Guangzhou Guangdong Peoples R China;

    SOA Inst Oceanog 2 Hangzhou Zhejiang Peoples R China;

    SOA Inst Oceanog 2 Hangzhou Zhejiang Peoples R China;

    Chinese Acad Sci Guangzhou Inst Geochem CAS Key Lab Marginal Sea Geol Guangzhou Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地球物理学;
  • 关键词

    the South China Sea; sinking particles; elemental geochemistry; Sr isotopes; Nd isotopes;

    机译：南海;沉没颗粒;元素地球化学;SR同位素;ND同位素;

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