Abstract:

Heilongjiang Yongxin gold deposit is located at the intersection of the Xing’an and Songnen blocks in the eastern section of the Xingmeng orogenic belt. It is a large-scale gold deposit newly discovered. In order to in-depth explore the metallogenic potential of the periphery and depth of the Yongxin gold deposit, based on the analysis of typical deposits, audio-frequency magnetotelluric sounding and combined gravity and magnetic profiles, the three-dimensional geological modeling software Creatar XModeling was used to construct three geological model models of the region and the deposit. The three-dimensional morphology of the main ore-controlling geological bodies was depicted, and the deep structural geological characteristics of the area, the spatial distribution characteristics of the ore bodies, and the relationship with geological elements were revealed. Then, using the cube prediction model prospecting method, according to the weight of evidence method, multi-source information such as geology and geophysics of the study area was fused, eight deep prospecting prediction targets were delineated. The drilling verification of some of these deep targets area obtained multiple mineralization information, which verified the accuracy and reliability of this deep prediction, indicating significant metallogenic potential in the deep part of the study area.

Key words: 3D geological modeling, geological-geophysical model, deep metallogenic prediction, Yongxin gold deposit