此内容来自第三方平台 (Dailymotion)。如果此视频侵犯了您的版权，请使用 立即删除 工具。
Gold ore
描述
The formation of gold through a process magmatisme on the surface as well as activities vulkanisma making it a consequence of the existence of native gold movements in the earth's heat or thermal.
Gold ore is produced from both primary and secondary sources , primary sources are mining activities and these take a variety of forms hard rock underground mining, open pit mining and dredging in the ocean lakes rivers and streams. Secondary sources refer to materials coming from recycled scrap metal scrap jewelry scrap electronic scrap spent sputtering targets and many others gold
See more information about Gold ore and Gold prospecting
goo.gl/TpVq1G
Gold ore is produced from both primary and secondary sources , primary sources are mining activities and these take a variety of forms hard rock underground mining, open pit mining and dredging in the ocean lakes rivers and streams. Secondary sources refer to materials coming from recycled scrap metal scrap jewelry scrap electronic scrap spent sputtering targets and many others gold
See more information about Gold ore and Gold prospecting
goo.gl/TpVq1G
相关视频
Gold Ore - Gold - Gold nuggets - Gold prospecting - ...
weightgal
California Gold Mining Gold Nugget Prospecting
weightgal
gold mining | gold prospecting trommels
findit1375
GREEN Plastic Gold Mining Pan Sluice Prospecting Panning 13-1/2" Review
LakitaModesta317
Different gold prospecting or mining methods
Gold_Prospecting
gold sniping - gold prospecting - Arizona Prospecting
heads1