Abstract:

The degree of the geological survey for gold deposits in the southeastern Guizhou and the mineral exploration study are very low, so the deep metallogenic environment is studied by using regional gravity and magnetic data, and a central eruption volcano circular structure or a group of concealed magmatic rocks are delineated there. The abnormal rock masses are distributed in the north-east direction and have a widely coverage area with complex configuration forms and obvious zoning characteristics. The abnormal rock masses cross the Qian-Xiang-Gui adjacent region and the principal anomaly is distributed in Guizhou. The distribution of the rock masses is controlled by three deep fractures, and four annules completely develop,i.e.center annule, inner annule, transitive annule and outer annule. The lithic facies appear with a whole set, and the branched rock abnormalities develop well. It is also found that gold deposits in Tianzhu-Jinping-Liping are similar with those in Danzhai-Sandu and Huitong-Huaihua and are regularly distributed along the structure band surface anticline or in the ore-rich formation, appearing quartz-vein, alterated-rock and microgranular-disseminated type gold deposits. This study has an important geological significance for a new understanding on geological characteristics and ore-forming regularity of gold deposits in the Qian-Xiang-Gui adjacent region.

Key words: gravity and magnetic anomaly, fracture, gold deposit, Qian-Xiang-Gui adjacent region