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首页> 外文学位 >Sedimentology and stratigraphy of the Lower Cretaceous Jackass Mountain Group, Camelsfoot Range, British Columbia.
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Sedimentology and stratigraphy of the Lower Cretaceous Jackass Mountain Group, Camelsfoot Range, British Columbia.

机译：不列颠哥伦比亚省Camelsfoot山脉下白垩统Jackass山群的沉积学和地层学。

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摘要

The Cretaceous Jackass Mountain Group (JMG), within the Camelsfoot Range of south-central B.C., is a >2 km thick succession of marine and nonmarine volcanic-rich, feldspathic litharenite and lithic arkose sandstone, lesser mudstone, and minor conglomerate, ranging early Aptian to Cenomanian/Turonian age. The JMG was deposited in the Jura-Cretaceous Methow-Tyaughton Basin, a piggyback basin that formed atop the accreting Bridge River, Cadwallader, and Shulaps terranes, between west coast North America and impending Insular Belt terranes. It is likely that most JMG sediment was derived from first cycle weathering of nearby source rocks dominated by a mix of moderately weathered volcanic and plutonic complexes. Three facies associations were identified that essentially represents two-thousand metres of sand-rich submarine fan turbidites, delta front or prodelta deposits, and nonmarine sedimentation. Combined, the facies associations represent an overall regression in the Methow-Tyaughton Basin as accreting terranes eventually closed the basin and amalgamated it onto the continent.;Keywords: Jackass Mountain Group; Camelsfoot Range; Methow Tyaughton Basin; Cretaceous.;Subject terms: Geology; Sedimentology; Stratigraphy; Tectonics.
机译：BC省中南部的Camelsfoot山脉内的白垩纪Jackass山脉群（JMG）继承了海相和非海相火山富集，长石变质的锂辉石和石质的黑砂岩，较小的泥岩和较小的砾岩，厚度超过2 km Aptian至Cenomanian / Turonian年龄。 JMG沉积在侏罗-白垩纪Methow-Tyaughton盆地中，这是一个背basin盆地，形成在北美洲西海岸和即将到来的Insular Belt地形之间的增生的Bridge River，Cadwallader和Shulaps地形之上。大部分JMG沉积物可能来自附近的烃源岩的第一周期风化，该烃源由中等风化的火山岩和深成岩复合体组成。确定了三个相联系，它们基本上代表了两千米的富沙海底扇形浊积岩，三角洲前缘或三角洲沉积物和非海洋沉积物。结合起来，这些相的组合代表了梅吐－蒂顿盆地的整体退化，因为逐渐增加的地层最终封闭了该盆地并将其合并到大陆上。骆驼脚山脉； Methow Tyaughton盆地；白垩纪；学科术语：地质学；沉积学地层学构造学。

著录项

  • 作者

    Goodin, J. Russell.;

  • 作者单位

    Simon Fraser University (Canada).;

  • 授予单位 Simon Fraser University (Canada).;
  • 学科 Sedimentary geology.
  • 学位 M.Sc.
  • 年度 2008
  • 页码 252 p.
  • 总页数 252
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 能源与动力工程;
  • 关键词

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