The Application Of Geophysical Prospecting Methods On Tuanyushu Gold Deposit Prospecting In Hebei Province

Tuanyushu gold deposit locates in the eastern part of the Zhangjiakou-Fengning-Chengde gold metallogenic belt,this deposit is a typical quartz vein type gold deposit, andwas found in recent years. It occurs in biotite plagioclase gneiss and plagioclase-hornblendegneiss of Dantazi group, Archean. The ore bodies distribution of veins and lens. Wall rockssuffered extensive alteration, mainly as potassic,silicification, sericitization andcarbonatation,and alteration have the characteristics of vertical variations obviously.In the area, pyrite, pyrrhotite, chalcopyrite, galena,sphalerite with gold mineralizationare of relatively high polarizability, pyrrhotite showed strongly magnetic response.So,it isvery different ip anomaly cause by metallogenic or non-metallogenic. The application ofinduced polarization method, resistivity method and high precision magneticmeasurement with theoretical and practical significance in the research area.At the base of comparative analysis of typical quartz vein type gold deposit’s geologicfeatures and geochemical ore-prospecting models at home and abroad, we summarized thefeatures of ore-bearing layer, structure, magmatic rock, ore-body, ore, wall rockalteration,geophysical and ore-finding indexes and established Geological-geophysicalore-prospecting model of Tuanyushu gold deposit.According to Tuanyushu gold deposit’s Geological-geophysical ore-prospecting model,carried out the high precision magnetic measurement induced polarization intermediategradient scan in the range of0.3km2mining area of Tuanyushu gold deposit, and scale is1：2000, network is20m×10m. For3anomalies were circled. Ⅰ anomaly andⅡ anomaly weremarked by features of ore-generating anomaly and the anomalous features are obvious,outlines are regular, distribution ranges are large, and centers are clear. The anomalies arerelative to surface structure-alteration-fragmentation-belt,auriferous quartz veins andreflecte features of gold ore-formation or ore body. According to induced polarizationsymmetric four pole sounding and data2D inversion, we found2high polarizabilityanomalous bodies and distributing as en echelon.The high polarizability anomalous is causeof auriferous quartz veins under the earth2～300m.We predicated3mineralization bodies. The mineralization bodies are150to370mlong,1to2m wide and2to250m deep. Extends to depth along100～300m along tendency.Preliminary prediction has potential gold resource in Tuanyushu gold area. Suggestions onthat,carry out going a step further deep drilling exploration. for geophysical result.