Yunnan Jinding Deposit Ore Body Three-dimensional Model And Applications

Jinding lead-zinc deposit, a famous super large ore deposit, has considerable reserve of lead, zinc, gypsum, celestite and pyrite. It's disputed in the genetic of the deposit, and unknown to the distribution in the 3-D space, attitude, and correlation of the various bodies. Therefore, the paper establishes the three dimension (3-D) visual model of the various bodies. 3-Demensional modeling is a new research method for geology of ore deposits. During the contrast of the multifarious software of 3-D modeling, SURPAC Vision 5.0 J, developed by Surpac Minex Group, is selected as the platform for the modeling of the Jinding deposit. Using 318 drilling holes, 140 thousand digital data in the 'detailed prospecting geological report of the Jinding lead-zinc deposit', the database of the drilling holes with types of Microsoft Access 2000, including information of location, survey and sample analytic data, is established in Surpac software. Based on the database of the drilling holes, drills can be visible in 3-dimension. It exhibits the coordinates of drilling openings, various information of the drills in space, spatial directions of extension, dip angles, and various information at different depth. Using the interaction tools of Surpac can construct the general spatial shapes of prospecting lines according to their projection shapes. Based on the principles of topology, we construct the 3-dimensional model of the orebodies at Jinding deposit from which we can observe in any directions. According to model, lead zinc ore bodies of mineral deposit, celestite ore bodies and gypsum ore bodies are distributed by the incomplete dome shape. The sandstone type ore bodies like a curved surface shape, is on the top, wide distribution, which like the top cover of a mushroom. The limestone breccia type ore bodies, under the sandstone type ore bodies, with mostly irregular vein shape, lens body shape, locate at the root of the mushroom. Gypsum and celestite ore bodies, accompanying with limestone breccia type ore bodies with the shape of vein, lens body, distribute under the sandstone type ore bodies. Such saline ore bodies as the gypsum and lazulite , etc. are presenting a more intact ring, and the ore body is distributed all around. The annular top has already been destroyed, have shown its primitive shape may be one salt dome. In view of existence of a large amount of pitch this mining area, hint the relation between the forming of Jinding deposit and salt mound destroy, oil gas escape function, according to the genetic and the model of the oil gas of the Caspian Sea. The correlation of the sandstone type ore bodies and limestone breccia type ore bodies is discussed, and the deep ore body is forecasted.