3D Geological Modeling And Analysis Of Geological Characters Of The Hetaoping Pb-Zn Deposit Of Baoshan,Western Yunnan

Hetaoping Pb-Zn deposit, which is located in the western Yunnan province, is a complex spatial and temporal distribution system, and the reason for its formation can be explained of multiple mutual coupling of mineralization. However, the causes of its mineral deposit has been controversial over the years. In this paper, we carry out the three-dimensional geological modeling for modeling the structural shape and the orebody geological characteristics of the deposit from the point of view of the three-dimensional to explanation of the Mineral deposit.The3D simulation selection GOCAD (Geological Object Computer Aided Design) software was chose as a platform. The surveying point data and the geological information, which were obtained by mine field survey and mine prospecting line profile map, respectively, were used to act as the base data for modeling. Finally, we established the model about three-dimensional geological structure model on the walnut floor headquarters ore segment, the geological body distribution model and solid model of the geological body of Hetaoping Pb-Zn deposit by using the discrete smooth interpolation and delaunay triangulation method of GOCAD. And it made the analysis people see the complex and changing geological patterns clearly and visually.By analysis of the established model, we get the following conclusions:(1) The distribution of Pb-Zn district Pb-Zn bodies and skarn taken on a multilayer, allelism occurrence was significantly controlled by the region near the north-south to the F1fracture and north-west trending faults, and Structural Ore-controlling role is a major regionalore-controlling factors. The Fu Wallrock were mainly for Upper Cambrian Hetaoping, group-thick layered marble rock of limestone, argillaceous banded limestone along the fault output silicate rocks (skarn).(2) Establishing the three-dimensional exhibition cloth model of the headquarters ore block ore body, F1fracture and deep F10fracture by using the GOCAD Geological simulation software. The findings show that the simulated V1, V2, V3, V4orebody were presented the irregular shape in the section, such as lenticular, cystic; The shape of orebody was simple in the three-dimensional distribution model, apart from the V1orebody nearly axisymmetric shape, slightly dome-shaped, other ore bodies are taken on irregular layered or stratiform, the spread and occurrence ore-controlling fault were Consistent; Every orebody generally arrangement along the left line of faults tend to left-echelon, trending north-south and tendency East and soothing wavy characteristics; The F1and F10were both the ore-controlling faults, F1outcropping on the surface, inclination with depth slightly slowed, F1faults rupture disc development V1orebody and skarn, and the skarn was the orebody carrier; F1and F10were intersect in the deep, F10fracture developed V2, V3, V4orebody, while the V2orebody contact directly with the fault, but the V3, V4were developed in the secondary fault of rupture F10.(3) Developed3D tectonic framework and geological entity model, can also observe the ore bodies in space distribution and the change rule of the form directly:Ore body along the strike and dip showed swollen shrinkage, reproduce pinch phenomenon, the thickened deep ore body is at V2, V3and V4ore body overlap area, where is the skarn development position; region formed with silicon Pb-Zn polymetallic deposit card rocks are closely related, is the early dry silicon card rock by later hydrothermal alteration effects and the formation of wet silicon by-product of card rocks, ore-forming elements mineralizate into rocks in the wet skarn.(4) Diabase are mainly concentrated in the northern ore body, diabase is output as lamelliform and vein-type. South of the ore body is north of V3ore enrichment zone, where can be found ore body cut through phenomenon. Little ore body are found at north of the diabase, diabase emplacement is prior to mineralization, and there is no relationship between diabase emplacement and mineralization. Diabase as a chemical barrier, results in enhancement in the surrounding mineralization, and at the same time as a physical barrier, causes the fluid migration is blocked deposits.(5) The developed3D geological Hetaoping the ore body model, grasp the best way to characterize the ore body shape modeling and solid modeling in continuous exploration, and the general idea is clear. Results of deposit, skarn, diabase, strata and fault contact surface of the3D model, show the spatial position relation between different geological factors accurately, which provide the powerful basis and new support for the analysis of the genesis of the deposit and the control area of rock and ore control regularity.