• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Sedimentary and petrologic analysis of the Mississippian Price Formation at Sherwood Lake, West Virginia.
【24h】

Sedimentary and petrologic analysis of the Mississippian Price Formation at Sherwood Lake, West Virginia.

机译：西弗吉尼亚州舍伍德湖密西西比价格形成的沉积学和岩石学分析。

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

Depositional facies determinations of the upper member of the Price Formation were made based on detailed descriptions of the six outcrops exposed along Sherwood Lake Road, Greenbrier County, West Virginia. Units were placed into one of seven facies: fluvial, distributary channels, crevasse-splays, swamp, beach-bar, lagoon, and interdistributary bay. Sandstone units of the respective facies were then petrographically analyzed.; Petrographic analysis indicates that there are distinct differences in mineralogies among the facies, particularly in the type of lithic grains present within the sandstones. High percentages of schist and phyllite rock fragments within the upper-delta-plain facies indicate that the parent material for the Price in southern West Virginia was dominantly metamorphic. Percentages of rock fragments change systematically down the regional slope; upper-delta-plain facies have high percentages of metamorphic rock fragments (schist and phyllite) and lower-delta-plain facies have abundant sedimentary rock fragments (shale). The change in rock fragments down the paleo slope can be attributed to (1) increased mechanical degradation of metamorphic rock fragments with greater distance from the source area and (2) the introduction of sedimentary rocks fragments that were locally derived from within the mud-rich beds, typically more common in the lower portions of the deltaic system.
机译：价格形成上部成员的沉积相确定是基于对西弗吉尼亚州格林布里尔县Sherwood Lake Road沿线露出的六个露头的详细描述。单元被放置在以下七个相之一：河床，分流河道，裂隙-张开，沼泽，海滩酒吧，泻湖和分流海湾。然后通过岩相学分析了各个相的砂岩单元。岩石学分析表明，相之间的矿物学存在明显差异，特别是砂岩中存在的岩性颗粒类型有所不同。上三角洲平原相中片岩和橄榄石岩石碎片的百分比很高，这表明西维吉尼亚南部普莱斯的母体物质主要是变质的。岩石碎片的百分比在区域坡度范围内发生系统性变化；上三角洲平原相的变质岩碎屑（片岩和千枚岩）的百分比高，下三角洲平原相的沉积岩碎屑（页岩）的百分比较高。沿古坡度下降的岩石碎片的变化可归因于（1）距源区较远的变质岩碎片的机械降解增加，以及（2）引入了富含泥浆的局部沉积岩碎片床，通常在三角洲系统的下部更为常见。

著录项

  • 作者

    Sheehan, Laura Ruth.;

  • 作者单位

    West Virginia University.;

  • 授予单位 West Virginia University.;
  • 学科 Geology.
  • 学位 M.S.
  • 年度 2002
  • 页码 132 p.
  • 总页数 132
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质学;
  • 关键词

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