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首页> 外文学位 >The inorganic geochemistry of two western U.S. coals: Emery Coal Field, Utah and Powder River Coal Field, Wyoming.
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The inorganic geochemistry of two western U.S. coals: Emery Coal Field, Utah and Powder River Coal Field, Wyoming.

机译：美国西部两种煤炭的无机地球化学特征：犹他州的埃默里煤田和怀俄明州的粉河煤田。

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摘要

he inorganic geochemistry of coals from the Cretaceous, Emery Coal Field, Utah and the Paleocene, Powder River Coal Field, Wyoming have been determined using XRF, various neutron activation techniques and SEM/EDS. Differences in deposition environments for the two coal deposits results in a higher ash content in the Utah coal (avg., 8.2%) relative to the Wyoming coal (avg., 4.4%). The Utah coal contains higher concentrations of 27 of the 40 elements detected in both coals. The geochemistry of overburden and clinker associated with the Wyoming coal and Fe-sulfide nodules (selected elements) from within the Utah coal is also reported.;Specific mineral phases within the two coals have been identified using SEM/EDS. Discrete grains contained in the surfaces of pellets prepared from crushed whole coal were analyzed and their mineralogies determined based on stoichiometry.;The oxidation of Fe-sulfide to hydrous Fe-sulfates is documented. Paragenesis results in szomolnokite developing on "clean" Fe-sulfide while halotrichite is the typical secondary phase which forms in the presence of clays.;The environmental aspects of coal utilization are discussed. A new term, "The Effective Coal Concentration (ECC)" is proposed to better assess the amounts of potentially harmful (as well as economically important) elements released to the environment as a result of coal utilization.;Some new conclusions regarding the organic/inorganic affinities of the elements are presented based on the physicochemical nature of the element at the time of emplacement. Elements with ionic potentials (IP)
机译：使用X射线荧光光谱法（XRF），各种中子活化技术和SEM / EDS测定了白垩纪，犹他州埃默里（Emery）煤田和怀俄明州新新世，粉河煤田的煤的无机地球化学。与怀俄明州煤（平均4.4％）相比，两种煤矿床沉积环境的差异导致犹他州煤（平均8.2％）中的灰分含量更高。犹他州的煤中两种煤中检出的40种元素中的27种浓度较高。还报道了与犹他州煤内的怀俄明州煤和硫化铁结核（选定元素）有关的表层和熟料的地球化学。;使用SEM / EDS鉴定了两种煤中的特定矿物相。分析了由粉碎的全煤制成的球团颗粒表面中所含的离散颗粒，并根据化学计量确定了其矿物学特征。共生会导致方沸石在“清洁的”硫化铁上生成，而锂铁矿是典型的在粘土存在下形成的第二相。讨论了煤炭利用的环境方面。提出了一个新术语“有效煤浓度（ECC）”，以更好地评估由于煤炭利用而释放到环境中的潜在有害（以及在经济上重要的）元素的数量。有关有机物/有机物的一些新结论根据放置时元素的物理化学性质，提供元素的无机亲和力。具有离子电势（IP）的元素

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  • 作者

    Powell, Michael A.;

  • 作者单位

    The University of Western Ontario (Canada).;

  • 授予单位 The University of Western Ontario (Canada).;
  • 学科 Geochemistry.
  • 学位 Ph.D.
  • 年度 1988
  • 页码 1 p.
  • 总页数 1
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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