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DISCUSSION ON METALLOGENIC CONDITION AND ORE-SEARCHING DIRECTION OF SHABAOSI GOLD DEPOSIT AT NORTHERN DAXING'ANLING MOUNTAINS

Huai Bao-feng

Abstract

Shabaosi gold deposit occurs in the terrestrial clastic rocks of Middle Jurassic Series including 6 ore veins trending roughly in N-S diection.It was formed in 4 metallogenic epochs and 6 stages.There are two types of gold ore,i.e.the altered sandstone type and the altered cataclastic rock type.The N-S fracture is the main ore-control structure and the ore fluid is the mixed liquid of magmatic hydrothermal fluid and meteoric water.The deposit was formed under condition of medium-low temperature,low salinity,low pressure,high sulfidation and low oxidation,sub-alkali and relatively reduced environment at shallow depth.It is a medium-low temperature sandstone type gold deposit.Regional structural and river sediment surveys are effective to the ore prospect.

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Key concepts: Geology, Cataclastic rock, Geochemistry, Clastic rock, Hydrothermal circulation, Gold ore, Ore genesis, Fluid inclusions