Petrographic and geochemical anatomy of lithotypes from the Blue Gem coal bed, Southeastern Kentucky
Petrographic and geochemical anatomy of lithotypes from the Blue Gem coal bed, Southeastern Kentucky
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DOI：
10.1021/ef00045a029
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发表时间：
1994-05
期刊：
影响因子：
5.3
通讯作者：
J. Hower;D. Taulbee;S. M. Rimmer;Liria G. Morrell
中科院分区：
文献类型：
--
作者：
J. Hower;D. Taulbee;S. M. Rimmer;Liria G. Morrell
主量元素、微量元素和微量元素与煤炭的关联性质一直是煤炭科学家深入研究的主题（Swaine；以及其中引用的参考文献）。密度梯度离心 (DGC) 提供了一种可以将超细煤颗粒划分为密度谱的技术，其中部分密度谱代表近乎纯净的单组分浓缩物。 DGC 通常在脱矿煤上进行，以确保所得 DGC 馏分的灰分含量非常低，特别是在较低比重的情况下。为了确定元素组成的趋势，特别是考虑显微组分与矿物质的结合，有必要避免脱矿质。为此，选择了肯塔基州诺克斯县的低灰分、低硫 Blue Gem 煤层（中宾夕法尼亚州 Breathitt 煤层）进行研究。本研究的目的是确定 Blue Gem 煤层岩型 DGC 分离物的岩相学和化学特征，特别是灰分地球化学特征。
The nature of the association of major, minor, and trace elements with coal has been the subject of intensive research by coal scientists (Swaine; and references cited therein). Density gradient centrifugation (DGC) offers a technique with which ultrafine coal particles can be partitioned into a density spectrum, portions of which represent nearly pure monomaceral concentrates. DGC has been typically conducted on demineralized coals assuring, particularly at lower specific gravities, that the resulting DGC fractions would have very low ash contents. In order to determine trends in elemental composition, particularly with a view towards maceral vs. mineral association, it is necessary to avoid demineralization. To this end the low-ash, low-sulfur Blue Gem coal bed (Middle Pennsylvanian Breathitt Formation) from Knox County, Kentucky, was selected for study. The objective of this study was to determine the petrography and chemistry, with particular emphasis on the ash geochemistry, of DGC separates of lithotypes of the Blue Gem coal bed.