LI Yong-gang1, YANG Guang-zhong1*, WANG Jia-jun2, RAO Hong-juan1, LIU Ling1, SHI Rui1, FENG Kai-you2
(1. 101 Geology Party, Bureau of Geology and Mineral Exploration and Development, Guizhou Province, Kaili Guizhou 556000, China;
2. 103 Geology Party, Bureau of Geology and Mineral Exploration and Development, Guizhou Province, Tongren Guizhou 554300, China)
Abstract: The geneisi of the Dahebian barite deposit, whose ores are hosted in the early Cambrian layered sedimentary rocks in the Dahebian area of Tianzhu County, Guizhou Province, is generally believed to be consistent with the viewpoint of the SEDEX type. However, researches on the thickness distribution regularity of barite ore layers and the location or controlling factors of the exhalation source channel of the deposit are limited and relatively poor. Through analyzing the thickness contour of barite ore layers of the deposit, it is found that the barite mineralization was closely related to the F1 fault. Through comprehensive analysis of geological surveys, exploration profiles, and geophysical exploration results, it is shown that the F1 fault is coupling one consisting of a ore-conducting structure (Fd) and a reverse fault (Fn). It had undergone at least three stages of faulting evolution. Especially, the early stage fault could be the basement fault constituting the exhalation source channel and main ore-controlling factor of the Dahebian barite deposit. Further analysis suggests that ores of the barite deposit should be relatively concentrated in two sides of the fault. Thus, the F1 fault structure zone and its vicinity, which had important favorable condition for mineralization, are potential targeting areas for the barite ore-prospecting.
Keywords: ore-conducting structure; three-dimensional diagram of thickness contour of ore beds; exhalation channel; Early Cambrian; Yangtze Plate
