...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Geochemistry, geophysics, geosystems >Taphonomic and Ontogenetic Effects on Na/Ca and Mg/Ca in Spinose Planktonic Foraminifera From the Red Sea
【24h】

Taphonomic and Ontogenetic Effects on Na/Ca and Mg/Ca in Spinose Planktonic Foraminifera From the Red Sea

机译：红海纺织浮游生物的巢穴和Mg / ca的术语和髓质作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

As a recorder of the hydrological cycle and ocean circulation, salinity is one of the most wanted parameters in paleoceanography. Current paleosalinity reconstructions mostly rely on the interpretation of stable oxygen isotope signals combined with an independent paleotemperature proxy. Due to error propagation, this indirect approach is associated with large uncertainties. Recent culture studies and a Red Sea field study have shown that incorporation of Na in foraminiferal shell calcite depends on salinity, providing a potential direct proxy for salinity. However, application of a Na/Ca-based salinity proxy requires further calibration, which should also consider settling of foraminifera through the water column and burial in the sediment. Here we compare Na/Ca in living specimens from Red Sea surface waters with specimens collected from 0- to 500-m water depth and sedimentary specimens from core-tops. This shows that Na/Ca in Globigerinoides ruber and Trilobatus sacculifer shells decrease with increasing water depth and until the sediment surface. For both species, laser-ablation-ICP-Q-MS measurements combined with electron-probe microanalysis show that Na is enriched in the spines. Loss of spines during settling of foraminifera through the water column hence provides a mechanistic explanation for the observed Na decrease in bulk specimens with water depth. In contrast, average Mg/Ca values increase toward the seafloor in both species, coinciding with deposition of gametogenic calcite, which is enriched in Mg but has Na/Ca values similar to that in lamellar calcite. Both spine shedding and gametogenic calcite addition hence affect the average minor/trace element composition of foraminiferal calcite. Summary Investigating past climates (paleoclimatology) potentially provides valuable information of climatic functioning, which is essential in times of ongoing global warming. The amount of salts dissolved in seawater is an important factor when trying to reconstruct
机译：作为水文循环和海洋循环的录音机，盐度是古科学术中最受欢迎的参数之一。目前的古疗程重建主要依赖于稳定的氧同位素信号的解释与独立的古间温度代理相结合。由于误差传播，这种间接方法与大的不确定性相关联。最近的培养研究和红海田野研究表明，Na in Na in inahaminifal壳方解石取决于盐度，为盐度提供潜在的直接代理。然而，施加Na / Ca的盐度代理需要进一步的校准，这也应该考虑通过水柱和埋藏中的埋藏来沉降。在这里，我们将NA / CA与来自红海地表水域的生活标本与来自0至500米的水深和来自芯片的沉积标本的标本进行比较。这表明Globigerinoides ruber和Trilobatus Sacculifer壳中的Na / Ca随着水深的增加和直到沉积物表面而降低。对于两种物种，激光烧蚀-ICP-Q-MS测量与电子探针微显分的测量结果表明NA富含脊柱。通过水柱沉降面包虫期间脊柱的损失为观察到的NA减少具有水深的机械解释提供了一种机械解释。相反，平均Mg / Ca值在两种物种中朝向海底增加，与配子燃料的沉积一致，富含Mg但具有类似于层状方解石中的Na / Ca值。因此，脊柱脱落和配子脱燃料添加剂都会影响花瓶内能源棉材石的平均次要/痕量元素组成。发明内容调查过去的气候（古表情病学）可能提供气候功能的有价值信息，这在持续的全球变暖时至关重要。溶解在海水中的盐的量是试图重建时的重要因素

著录项

  • 来源
    《Geochemistry, geophysics, geosystems》 |2018年第11期|共21页
  • 作者

    E. M. Mezger; L. J. de Nooijer; M. Siccha; G.-J. A. Brummer; M. Kucera; G.-J. Reichart;

  • 作者单位

    Royal Netherlands Institute for Sea Research Department of Ocean System Sciences and Utrecht University Texel Netherlands;

    Royal Netherlands Institute for Sea Research Department of Ocean System Sciences and Utrecht University Texel Netherlands;

    MARUM-Center for Marine Environmental Sciences University of Bremen Bremen Germany;

    Royal Netherlands Institute for Sea Research Department of Ocean System Sciences and Utrecht University Texel Netherlands;

    MARUM-Center for Marine Environmental Sciences University of Bremen Bremen Germany;

    Royal Netherlands Institute for Sea Research Department of Ocean System Sciences and Utrecht University Texel Netherlands;

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

    Taphonomic and Ontogenetic Effects; Na/Ca; Mg/Ca;

    机译：术语和髓内效应;na / ca;mg / ca;

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