...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ground water >Heterogeneities in Glaciofluvial Deposits Using an Example from New Hampshire
【24h】

Heterogeneities in Glaciofluvial Deposits Using an Example from New Hampshire

机译：使用新罕布什尔州的一个例子对冰川河流沉积物中的异质性

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

The strong influence of subsurface heterogeneity on contaminant migration and in situ remediation calls for an improved understanding of its origins and more efficient methods of characterization. Accordingly, an outcrop study of physical and chemical heterogeneity was conducted in a glaciofluvial deposit in Deerfield, New Hampshire, in order to uncover processes controlling the spatial variation of sediment properties and evaluate the extent to which geologic information can be used to characterize the observed variation. The results indicate that physical and chemical properties at the Deerfield site have distinctly different spatial correlation structures. Lithologic facies explain 31% to 60% of the variation in permeability, dithionite citrate (DC)-extractable manganese, and DC-extractable aluminum. Lithofacies bounding surfaces do not separate regions of significantly different DC-extractable iron; instead, 49% of its variation is explained by sediment color. Color also accounts for 34% of the variation in DC-extractable aluminum and 60% of the variation in DC-extractable manganese. Strong relationships with sediment facies and/or color enable detailed mapping of permeability, extractable iron, and extractable manganese. Differences in the geometries of iron and manganese enrichment, petrographic observations, and scanning electron microscope analyses indicate that (hydr)oxide grain coatings originated from the postdepositional weathering of biotite and garnet, coupled with local, redox-driven redistribution of the liberated iron and manganese. The findings suggest that lithofacies and color information can aid the characterization and modeling of heterogeneity at similar carbon-poor glaciofluvial sites.
机译：地下异质性对污染物迁移和原位修复的强烈影响要求对其起源和更好的表征方法有一个更好的了解。因此，在新罕布什尔州迪尔菲尔德的冰川河流相矿床中进行了物理和化学非均质性露头研究，以揭示控制沉积物空间分布变化的过程，并评估地质信息可用于表征观测到的变化的程度。 。结果表明，迪尔菲尔德站点的物理和化学性质具有明显不同的空间相关结构。岩性相解释了31％至60％的渗透率变化，柠檬酸连二亚硫酸盐（DC）可萃取的锰和DC可萃取的铝的变化。岩相边界表面不会分隔可DC提取的铁的区域。相反，其变化的49％由沉积物颜色解释。颜色还占可直流提取的铝变化的34％和可直流提取的锰的变化60％。与沉积相和/或颜色的密切关系使得可以对渗透率，可提取铁和可提取锰进行详细绘制。铁和锰富集的几何形状，岩相学观察和扫描电子显微镜分析的差异表明，（氢）氧化物颗粒涂层源自黑云母和石榴石的沉积后风化，再加上释放的铁和锰的局部氧化还原驱动的重新分布。研究结果表明，岩相和颜色信息可有助于在相似的碳贫乏冰川河流位点表征和建模异质性。

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