北亚煤炭(西伯利亚、俄罗斯远东地区和哈萨克斯坦)中的钨(W)地球化学特征

IF 5.6 2区 工程技术 Q2 ENERGY & FUELS
S.I. Arbuzov , I.Yu. Chekryzhov , V.I. Vyalov , D.A. Spears , A.S. Kholodov , N.Yu. Popov
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引用次数: 0

摘要

本研究根据对两千多个样本的分析,讨论了北亚(西伯利亚、俄罗斯远东和哈萨克斯坦)煤中钨(W)地球化学的新数据。总体而言,与全世界煤炭的平均值相比,所研究煤炭中的钨含量较高。在研究区域的不同地区,发现了W含量异常的煤层(达到重要的商业浓度),并对控制这些煤炭中W含量的因素进行了研究。选择样本的目的是研究煤层中 W 的垂直变化,以及确定 W 在整个煤盆地中的横向分布。具有平均 W 浓度的煤层通常会在煤层边缘出现一些富集现象(Zilbermints 法)。然而,在异常富集的煤层中,可以观察到几种 W 分布模式。最常见的是煤层底部富集,浓度向上递减,较少见的是相反的情况,很少有煤层中部富集的情况。目前的研究结果表明,W 主要与有机物有关。在褐煤中,80%以上富集在腐殖质中,其余富集在矿物物质中。然而,随着煤化过程中有机物的转化,部分 W 进入溶液,形成自生矿物,并从煤层中流失。煤层中 W 分布的性质表明,主要是一种氢(水)迁移和积累机制。结论是,成煤盆地周围岩石类型的组成以及这些盆地和矿床的水文地球化学条件是决定煤中 W 累积水平的关键因素。这项研究中描述的煤炭和泥炭中钨浓度的升高和异常是由于富含钨的岩石,主要是花岗岩和含钨灰岩和矽卡岩的浸出作用造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Tungsten (W) geochemistry in north Asian coals (Siberia, Russian far east and Kazakhstan)
This research discusses new data on the geochemistry of tungsten (W) in the coals of North Asia (Siberia, the Russian Far East, and Kazakhstan), based on analyses of over two thousand samples. In general, the studied coals are enriched in W in comparison with the average value for coals all over the world. In different regions of the studied area, coal deposits with anomalous W concentrations (up to commercially important concentrations) were found and the factors controlling the W content in these coals were investigated. Samples were selected in order to study both the vertical variation in W through the seams and laterally to determine its distribution across the coal basins. Seams with average W concentrations generally show some enrichment at the margins of the seam (Zilbermints law). In anomalously enriched seams, however, several patterns of W distribution are observed. Most commonly the base of the seam is enriched and concentrations decrease upwards, less commonly the reverse is the case and rarely the central parts of the seam are enriched. The results from the present work demonstrate that W is predominantly organically associated. In lignites, more than 80 % is concentrated in humic substances with the remainder in mineral matter. However, as the organic matter transforms during coalification some of the W passes into solution leading both to the formation of authigenic minerals and also loss from the seam. The nature of the W distributions in the coal seams indicates a predominantly hydrogenous (aqueous) mechanism of transport and accumulation. It is concluded that the composition of the rock types surrounding the coal-forming basins and the hydrogeochemical conditions of these basins and deposits are critical factors in determining the levels of W accumulation in the coals. The elevated and anomalous tungsten concentrations in coal and peat described in this work are due to the leaching of tungsten rich rocks, primarily granitoids and tungsten-bearing greisens and skarns.
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来源期刊
International Journal of Coal Geology
International Journal of Coal Geology 工程技术-地球科学综合
CiteScore
11.00
自引率
14.30%
发文量
145
审稿时长
38 days
期刊介绍: The International Journal of Coal Geology deals with fundamental and applied aspects of the geology and petrology of coal, oil/gas source rocks and shale gas resources. The journal aims to advance the exploration, exploitation and utilization of these resources, and to stimulate environmental awareness as well as advancement of engineering for effective resource management.
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