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SIGNATURE AND PREREQUISITE FOR ORE HUNTING OF XI'ANHE GOLD ORE DEPOSIT

Yong Chen

Abstract

Xi'anhe structural (hydrothermal slution) altered gold ore deposit, it occured in a faulted-fracture zone that developed in Danfeng group and Dacaotan Formation,strike nearly EW. It's a mid scale and its ore belongs to low grade structural altereds tyle,limonite,pyrite are mainly gold carriers. Wall rock alteration are mainly silicatization,limonitization,pyritization and sericitization. Mesobasic volcanic rock,tenacity brittle fault structure and meso-acidic magma intrusion were consisted of a basic condition for ore forming.In this region,metallogenic condition very good and may be large scale gold ore deposit in this region, and the near EW faulted altered belt is a favorable section for hunting gold ore deposit.

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Key concepts: Limonite, Geology, Gold ore, Geochemistry, Intrusion, Pyrite, Hydrothermal circulation, Magma