Abstract: Combing with the geological investigation results and laboratory analysis results,the metallogenic geological conditions,ore-fabric characteristics and the occurrence state of silver of the Laoliwan porphyry silver deposit in Xiaoshan area,Henan province,the results show that:①the ore-bodies are mainly controlled by faults and its secondary faults,the selectively of metallogenic to surrounding rock is poor;②porphyry monzonitic granite rock mass of Laoliwan porphyry silver deposit is closely related to the mineralization in the mining area,it is the main ore-bearing rock mass;③the ore structure in the mining area is mainly for cataclastic structure and granular structure,the ore common structure are massive structure,disseminated structure and vein structure,the silver mineral composition are mainly for natural silver,sulfur,copper and silver ores,followed by silver and gold,argentite,acanthite,pyrargyrite,proustite;④the alteration type and zoning characteristics associated with mineralization of Laoliwan silver deposit are similar to the ones of Lengshuikeng porphyry silver deposit in Jiangxi province,which indicated that the prospecting potential of porphyry silver deposit in Xiaoshan area in Henan province is large.

Key words: Metallogenic geological condition, Ore fabric characteristics, Occurrence state of silver, Prospecting potential