Placer gold deposits are wide spreading in the northern Tibetan plateau,but rock gold exploration has no penetration yet. Through detailed research on geological environment, placer gold occurrence horizon,placer gold granularity,shape,composition,and correlative heavy mineral as semblage of Bengnazangbu placer gold deposit that is the largest in northern Tibet, we discover that the placer gold enriched horizon and degree are mutually correlated with the content of cryptocrystal line siliceous concretion or siliceous cement. The research shows that in this gold deposit, gold is from deep Earth,and it was carried out by terrestrial hot spring and then turned into surface super genesis,and gold was transferred and enriched owning to change of water-chemical environment.This embodies a continuous mineralizational mechanism of endogenous and exogeneous mineralization,which has important significance for recognition of the placer gold mineralization and rock gold exploration sign.
Longkou Damoqujia gold deposit is located in the north of Zhaopin mineralization belt,the north-east of the Linlong and Dongfeng large-size gold deposit.This paper interpretes and appraises the stream sedmient anomalies and rock surveyanomalies.Studies the multi element primary anomaly structure,shape and component features of profile 80 and 84.The"Y"shape structure supermiposed halo is put forward.The features of geochemical anomaliy vertical longitudinal project profile diagram is discussed.The relation of gold ore body and anomalies is illustrated.Prospecting direction and geochemical zoning index is pointed out.
The Xilaokou gold deposit is located in the east to Guocheng fault.The deposit occurs in the intersection between the Linlong monzonite granite bodies of new Proterozoic Sinian period and the Jinshan stratum of ancient Proterozoic.The ore bodies are controled by NE and nearly EW trend faults.They formed with lens shape and with pyritization,silication and carbonation alternation.Because of the difference of ore-controlling structure and their wall rocks characteristic,the deposit bed types are divided into pyrite sericite-quartz type and multi-metal sulfide type.Its prospecting direction is pointed out.
The Damoqujia gold deposit is located in the north of the Zhaoping fault belt. It is a part of the Linglong gold deposit. In the major structure,the gold vein 302,more than 50 tons gold resource is blocked out.In the eye of the geological meaning,the Damoqujia and Dongfeng gold deposit are one gold deposit.Nowadays,near 90 tons gold resource is blocked in gold vein 202 to 206 of vein 207 lower plate,the major structure.It nears the gold resource of vein 207.This shows that its lower plate possess the great potential. Base on this,the lower plate secondary faults of vein 302 also possess great resource potential.
Passes two mylonites belts mineralization characteristic which mines had summarized to the Hetai gold ore,analyzes 19 mylonites belts the geological condition,forecast it includes the industry ore body,and ChengGongtan arrives the ore body,obtains the commercial production.This prospecting breakthrough for next step will provide the instruction in the periphery prospecting.
A method of recovering gold and silver from gold-containing scrap in high-temperature equipments using copper bath is described in this paper.On the precondition of adjusting slag constitution and selecting a suitable quantity of proper solvent the recovery rate of gold and silver can reach to 99.95%and 99.82% respectively.This method should be significative to the industry application.
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