...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Estuarine Coastal and Shelf Science >Metal diagenesis in a shallow semi-enclosed marine system in the Aegean Sea, Greece
【24h】

Metal diagenesis in a shallow semi-enclosed marine system in the Aegean Sea, Greece

机译：希腊爱琴海浅半封闭海洋系统中的金属成岩作用

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

Trace metal and organic carbon distributions were examined in core sediments of Kalloni Bay during September 2000 in order to examine the diagenetic process and its impact on metal mobility. Solid sediment profiles show significant variations in Mn, Fe and Ni concentrations between sampling stations due to geological background variability and diagenetic processes in the sediment (for Mn). Solid phase organic carbon profiles reflect episodic input of organic matter from the land. The redox status of the sediments can be characterized from sub-oxic to anoxic, leading to dissolution of Mn oxides and enhancement of dissolved Mn at the surface sediment layers of the Bay. Dissolved Fe maximal concentrations were located at a sediment depth of few centimetres below the Mn maximum. Nickel distribution was mainly influenced by the geological background of a part of the Bay's watershed consisting of ultrabasic minerals. Partition coefficients between solid phase and pore-water (K_ds) indicated the increase mobility of Mn (and to a lesser degree of Ni and Zn) in the upper sediment layers. Concentrations Factors indicated that metals (especially Mn and Zn) may flow from porewater to the overlying seawater because of concentration gradients.
机译：为了研究成岩过程及其对金属迁移率的影响，在2000年9月对卡洛尼湾核心沉积物中的痕量金属和有机碳分布进行了检查。固体沉积物剖面显示，由于地质背景的变化和沉积物中（锰）的成岩作用，采样站之间的Mn，Fe和Ni浓度存在显着变化。固相有机碳剖面反映了来自陆地的有机物的间歇性输入。沉积物的氧化还原状态可以从低氧到缺氧来表征，从而导致Mn氧化物溶解并增加海湾表层沉积物层中溶解的Mn。溶解的铁最大浓度位于最大锰以下几厘米的沉积深度处。镍的分布主要受海湾由超碱性矿物组成的分水岭的一部分的地质背景的影响。固相和孔隙水之间的分配系数（K_ds）表明上层沉积物中锰的迁移率增加（镍和锌含量降低）。浓度因素表明，由于浓度梯度，金属（尤其是Mn和Zn）可能从孔隙水流到上覆海水。

著录项

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