北查尔斯王子山贝恩梅达特煤系煤层的煤岩学与煤化学特征

贝恩梅达特煤系是南极北查尔斯王子山地区发育的一套二叠纪含煤地层。在中国31次南极考察期间，从该地层单元的格洛索普特里斯冲沟段和麦金农段共采集了11件煤样品。为了了解这些煤的基本特征，开展了煤的煤岩学分析、工业分析和元素分析。煤的煤岩组分结果表明，两地层的煤均以有机组分为主(格洛索普特里斯冲沟段和麦金农段有机总量平均值分别为85.5%和91.1%)，且镜质组和惰性组占主要比例;无机组分含量在两地层单元的煤中均较低且以黏土和氧化物(石英)为主，硫化物只出现在麦金农段局部煤中;两地层单元煤的最大反射率基本一致，平均值均为0.64%;工业分析结果表明麦金农段的煤具有特低-高灰分(9.85%~84.16%)、低-特低全水分(2.38%~6.18%)、高-特高挥发分(38.98%~66.76%)、低-特低硫(0.23%~0.68%)和中等-特低固定碳(5.26%~55.01%)特征;格洛索普特里斯冲沟段的煤具有中灰分(21.05%~29.40%)、低-中等全水分(7.44%~9.94%)、高挥发分(40.99%~43.67%)、特低硫(0.38%~0.44%)和低-特低固定碳(39.77%~46.59%)特征。两地层单元煤的焦渣特征为2。元素分析结果表明，麦金农段的煤属于低-特低磷(0.005%~0.019%)、低-高氟(108~829 μg/g)、特低-高氯(0.017%~0.535%)和一级含砷(0~7 μg/g)煤;格洛索普特里斯冲沟段的煤属于低-特低磷(0.006%~0.024%)、高氟(260~478 μg/g)、中氯(0.007%~0.208%)和一级含砷(1~6 μg/g)煤;格洛索普特里斯冲沟段煤属于褐煤，而麦金农段煤类型复杂，泥煤和烟煤均发育，类似于印度默哈讷迪盆地的煤。

Coal petrography and coal chemistry characteristics of Bainmedart Coal Measures,Northern Prince Charles Mountains

To understand the basic characteristics of coals from Bainmedart Coal Measure,one of the Permian coal-bearing units of Amery group in Northern Prince Charles Mountains,Antarctica,eleven coal specimens were collected from the McKinnon Member and Glosopteris Gully Member during the Chinese 31st Antarctic expedition and conducted the coal petrography,proximate and ultimate analysis.The macerals of coal seams of two geological units indicate that organic components,characterized by the vitrinites and inertinite,have the higher contents,while the inorganic components are mainly composed of clay and oxides(Quarts),together with the minor sulfide only enriched in partial layers of McKinnon Member.The maximum reflectance of vitrinite in coal seams of these two units are similar,both with the mean of 0.64%.Proximate analyses indicate that the coals from McKinnon Member are characterized by the extra-low to high Ash contents(9.85%-84.16%),extra-low to low moisture contents(2.38%-6.18%),high to extra-high volatile components(38.98%-66.76%),extra-low to low total sulfur contents(0.23%-0.68%) and extra-low to medium fixed carbon contents(5.26%-55.01%),and coals of Glosopteris Gully Member have the characters of the medium ash contents(21.05%-29.40%),low to medium moisture contents(7.44%-9.94%),high volatile components(40.99%-43.67%),extra-low total sulfur contents(0.38%-0.44%) and extra-low to medium fixed carbon contents(39.77%-46.59%).The Char Residue Characteristic of these coal seams is two.Ultimate analyses indicate that the coals of McKinnon Member have an extra-low to low phosphor contents(0.005%-0.019%),low to high fluorine contents(108-829 μg/g),extra-low tohigh chloride components(0.017%-0.535%) and one-grade arsenic contents(0-7 μg/g);and coals of Glosopteris Gully Member are characterized by an extra-low to low phosphor contents(0.006%-0.024%),high fluorine contents(260-478 μg/g),medium chloride components(0.007%-0.208%) and one-grade arsenic contents(1-6 μg/g).The coals from Glosopteris Gully Member are of the lignite in rank,but these from McKinnon Member are of the peat to bituminous in rank.The coals studied here are similar with those of the Indian Mahanadi Basin.