[1]Department of Earth & Atmospheric Sciences, NationalInstitute of Technology, Rourkela, Odisha 769008, India;
[2]Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur, West Bengal 721302, India;
[3]Vale Institute of Technology, Boaventura da Silva, Belem,Pardi 66055-090, Brazil;
元素赋存状态; 地球化学特征; 煤田; 傅立叶变换红外光谱; 中微量元素; X-射线衍射; 元素浓度; 地壳丰度;