NUMERICAL SIMULATION OF STRUCTURAL CONTROL OF GOLD DEPOSITS IN THE XIAODONGYANGHE AREA OF LIAONING PROVINCE

This paper studies the geological structure in the Xiaodongyanghe area, Hebei, and proposes a new method for forecasting blind gold ore bodies by means of numerical simulation.On the basis of intensive field work, we distinguished the synmetallogenic structural system and the main metallogenic stages, leaving out the structures and geologic bodies which formed after the main metallogenic stage, and leaving in those formed during and before the main metallogenic stage for establishing the experimental model. The model experiment was conducted using finite element method to study the stress field and the stress drop which occurred before and after the synmellogenic deformation. The stress concentrations overlapping the high stress drops are regarded as forecast gold targets. The target Predicted were found to well agree with the known ore spots as well as the geochemical anomalies. Altogether ten drill holes and a drift were designed for verification.