Erdaogou gold deposit is a magmatic-hydrothermal deposit hosted in continental volcanic rocks in Liaoning Province，its orebodies are strictly controlled by structures.Predecessors have done a lot of research on the genesis of Erdaogou gold deposit in Liaoning，and carried out a lot of exploration and prospecting work in the mining area， and found some new veins， but the deep prospecting prediction of some mined veins are relatively weak.After years of mining and production， the mine urgently needs to increase resource reserves to maintain development. At present， the control length of No.1 and No.3 veins are about 680 m， while the control length of No. 5-1 vein on the west has reached 1 600 m，and the deep part of No.1 and No.3 veins may still have a certain scale extension.At present，except for the deep prospecting prediction by using the thermoelectricity of pyrite at the middle section of the 250 m to -215 m depth of the No.3 vein， the systematic research on the No.1 and No.3 veins have not been carried out.In order to predict the extension，metallogenic environment and mineralization of No.1 and No.3 veins，this paper systematically studied the thermoelectric characteristics of pyrite，ore-forming temperature，veins denudation rate，X _NP mean and the occurrence rate of different elevations of P-type pyrite of the samples at the 450 m to -305 m depth.The results show that the ore-forming temperatures of No.1 and No.3 veins are 130~280 ℃，which belong to medium-low temperature hydrothermal deposits.The average denudation rates of No.1 vein is 45.89%，the contour of denudation rate becomes a low value area to the deep and is not closed，the thermoelectric conductive types is mainly P type， P-N type and mean value of X _NP at the -305 m depth is 83.33（upper part of vein），the occurrence rate of P-type pyrite at the middle section of -215 m increases. The average denudation rates of No.3 vein is 50%.The contour of denudation rate becomes a high value area and is not completely closed，the thermoelectric conductive types is mainly P-N type and N-P type，mean value of X _NP at the -305 m depth is -8（middle part of vein），the occurrence rate of P-type pyrite in the middle section of -215 m decreases，which show the middle section of -305 m is the middle and upper part of No.1 vein and the lower part of No.3 vein.The deep part of No.1 vein extends greatly，while the No.3 vein still extends partly to the depth.The metallogenic environment of No.1 vein is gradually stable and greatly mine-ralized at the -215 m depth，but the metallogenic environment of No.3 vein changes from turbulent to stable and mineralization is better at the -260 m depth.

http://www.goldsci.ac.cn/article/2020/1005-2518/1005-2518-2020-28-6-812.shtml

辽宁省二道沟黄金矿业有限公司陈永长高级工程师和焦海豹工程师在野外和井下取样工作中给予热心帮助，在此表示衷心感谢！