Abstract:
The Linglong gold field in Jiaodong Peninsula was well known for numerous quartz vein-type gold deposits.In recent years, a giant altered rock type gold deposit with resources of more than 600 tons was discovered in the deep.Detail study on three-dimensional characteristics of this gold deposit will help guide further deep prospecting in the region.This paper introduces how to establish a three-dimensional geological model of the Lingnan-shuiwangzhuang giant gold deposit using 375 drilling holes.The three-dimensional spatial characteristicsand the spatial distribution law of main orebodies were revealed through the 3D model.There were three main ore bodies, which were distributed along the footwall of the Jiuqu-Jiangjia Fault and the Potouqing Fault in the north section of Zhaoping Fault Systems.The ore-bearing faults are in a gentle wave shape along the striking direction, and dip angle gradually changes to gentle from shallow to deep along thedipping direction.The thickness of ore bodies shows an alternating change of along the striking thickness along the strike and inclination.The correlation coefficient between the grade and thickness of the ore body is 0.192.The three-dimensional distribution of the product of the grade and thickness constitutes four mineralized enrichment areas.The analysis shows that the ore bodies are easy to be enriched in the areas with large slope changes on the fault surface and the areas with gentle slope.It can be seen that the change of fault dip angle is the key factor of gold mineralization enrichment, and the study and exploration of the change of fault dip angle should be paied more attention to in deep prospecting.