Geochemistry of Kasnau-Matasukh lignites, Nagaur Basin, Rajasthan （India）  

作　　者：Prakash K. Singh Pramod K. Rajak ramod K. Rajak Vijay K. Singh Amiya S. Naik Prakash K. Singh;Pramod K. Rajak;ramod K. Rajak;Vijay K. Singh;Amiya S. Naik(Coal & Organic Petrology Lab, Centre of Advanced Study inGeology, Banaras Hindu University, Varanasi,Uttar Pradesh 221005, India)

机构地区：[1]Coal & Organic Petrology Lab, Centre of Advanced Study inGeology, Banaras Hindu University, Varanasi,Uttar Pradesh 221005, India

出　　处：《International Journal of Coal Science & Technology》2016年第2期104-122,共19页国际煤炭科学技术学报（英文）

摘　　要：The distribution and verticals variation of geochemical components in the Kasnau-Matasukh lignites of Nagaur Basin, Rajasthan, were investigated using microscopy, proximate and ultimate analyses, Rock-Eval Pyrolysis, X-ray diffraction and Fourier Transform Infrared analyses, and major/minor/trace element determination. The relationship of elements with ash content and with macerals have also been discussed. These lignites are stratified, black, dominantly composed of huminite group macerals with subordinated amounts of liptinite and inertinite groups. They are classified as type-III kerogen and are mainly gas prone in nature. The concentration （in vol%） of mineral matter is seen to increase towards upper part of seam and so is the concentration （in wt%） of the volatile matter, elemental carbon and sulphur. The common minerals present in these lignitesare mixed clay layer, chlorite, and quartz as identified by X-ray diffraction study. Compared with world average in brown coal, the bulk concentration of Cu is anomalously high in most of the samples while Cd is 2-3 times high and Zn is high in one band. Based on interrelationship, different pyrite forms are noticed to have different preferential enrichment of various elements. The concentration of disseminated pyrite is more than the other pyrite forms and is followed by discrete pyrite grains and massive pyrite.

关 键 词：GEOCHEMISTRY MACERALS Trace elements Kasnau-Matasukh lignite RAJASTHAN 

分 类 号：P618.510.4[天文地球—矿床学] TD849.2[天文地球—地质学]