山西平朔矿区4号煤中锂、镓资源成矿地质特征研究

平朔矿区位于山西省朔州市宁武煤田北端,太原组为主要含煤地层,主要可采煤层为4,9,11号煤层,全区稳定发育。通过对剖面和钻孔采样测试,发现区内4号煤锂的平均含量远远大于中国煤中锂含量的均值,同时,镓的整体含量也比较高,达到工业品位,超常富集状态明显。4号煤中锂、镓富集可能是与矿区位于不畅通的海湾地带,海水作用较小有关,同时物源供给丰富,后期适宜的古气候条件,风化、剥蚀、搬运、溶蚀、淋滤等作用使黏土中钙、硫等流失,铝、硅、锂、镓等富集。

Lithium and Gallium Resources Metallogenic Geological Characteristics in Coal No.4, Pingshuo Mining Area,Shanxi

The Pingshuo mining area is situated at the north end of Ningwu coalfield, Shuozhou City, Shanxi Province. The Taiyuan Formation is the main coal- bearing strata, with main coal mineable seams Nos.4, 9 and 11 and stably developed in the whole area.Through test of samples from sections and boreholes has found the lithium content in coal No.4 is much greater than the average in Chinese coals, also the higher content of gallium as a whole, and come to industrial grade, obviously paranormal enrichment. The enrichment of lithium and gallium in coal No.4 may relate to the mining area history of clogged embayment and lesser seawater actions, as well as abundant material sources; later stage appropriate paleoclimate, weathering, erosion, transport, corrosion and leaching made calcium and sulfur run away, aluminum, silica, lithium and gallium enrichment.