关键词: 同位素, 矿化规律, 成矿预测, 架底金矿床, 盘县

Abstract: Jiadi gold deposit is located in the southeastern wing of Lianhuashan anticline, 3 km away from the anticline core. It’s the first large primary gold deposit closely related to Emeishan basalt found in China in recent years. Similar to other gold deposits in southwest Guizhou, Jiadi gold deposit belongs to fine grained disseminated gold deposit, and the source of oreforming fluid is characterized by magmatic water. Basalt is the main orebearing stratum in the mining area, and black tortoise volcanic breccia is the main orehosting rock. Through the analysis of mineralization trend, the superimposed area of Lianhuashan anticline (marginal fold) and the near EW anticlinorium is the favorable oreforming position, which controls the distribution and occurrence characteristics of the orebodies in the deposit, and the near EW anticlinorium directly controls the characteristics of the near EW distribution of the orebody: the closer to the core of Lianhuashan, the higher the ore grade and the thicker the orebody. Based on the analysis of the primary halo geochemistry, there may still be gold orebodies bound by faulted or strata on the top of the ore body. It is considered that the goldbearing hydrothermal solution came from the deep, rose to a certain position along the deep fault, and migrated from east to west along the interlayer fracture zone, experiencing at least two major metallogenic stages. The comprehensive study shows that the whole Lianhuashan area has a better prospecting prospect, and the gold deposits in this area may be distributed in an isometric or unequal interval pattern in the SN direction, and the favorable oreforming area controlled by superimposed folds are estimated to be more than  5 km away from the core of Lianhuashan anticline. Except for Emeishan basalt, the strata bound or faultcontrolled gold orebodies may be formed in the Upper Permian Longtan Formation and Triassic strata in favorable structure and suitable lithology.

Key words: isotope, mineralization regularity, metallogenic prediction, Jiadi gold deposit, Panxian County