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一、山东三山岛海下钻孔2000 m,探获中国首个超大型海上金矿由山东省第三地质矿产勘查院实施的莱州三山岛北部海域金矿床详查项目于2015年12月顺利结束,探获中国首个超大型海上金矿。莱州三山岛海域金矿勘探项目始于2012年,多数钻孔设计在海域,水深5~10 m,最深达15 m。目前已完成钻孔130个,钻探工作量13万余米,最大钻孔深度达1973.46 m,探明金矿资源量470.47 t,属超大型金矿。
First, 2000 m deep sea of Sanshan Island, Shandong Province, China’s first large offshore gold mine to be explored Details of the gold deposit of the northern sea of Sanshan Island, Laizhou, implemented by the Third Geological Exploration Institute of Shandong Province, ended successfully in December 2015 , China won the first large-scale offshore gold mine. Laoshan Sanshandao goldfield exploration project began in 2012, the majority of drilling design in the sea, the water depth of 5 ~ 10 m, the deepest up to 15 m. At present, 130 holes have been drilled, the drilling workload is over 130,000 meters, the maximum drilling depth is up to 1973.46 m, and proven gold resources are 470.47 tons, belonging to the super-large gold mine.