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山东莱州再探出世界级金矿 备案金金属量382吨(图)
揭密:陆地4000米深钻发现西岭金矿
这个任务对地矿三院来说算是“小意思”了:他们曾钻探孔深2843.18米,创下“全球海洋地球科学钻探全取心孔深”最高纪录;今年发现的最大的西岭矿区大部分是由他们勘探的,他们成功完成陆地4000米科研深钻施工。
“向地下三四千米钻探一次,就要花费上千万元,因此‘在哪找’是决定成败的关键。”山东黄金集团总工程师傅学生介绍,“三山岛矿区西岭金矿”已备案金金属量382.58吨,预计勘探结束后,可提交金资源量550吨以上,据勘探方估测,该金矿潜在价值超1500多亿元。
金矿矿石(资料图)
“地壳中的含矿热水溶液在一定的物理化学条件下,将矿质沉淀在各种有利的构造和岩石中,这便是‘热液成矿’。但它既形成了金矿,也留下了与金矿密切相关的几十种元素(如汞、砷、银、铋、铜等等),我们称之为‘晕’。构造叠加晕找矿就是我们不断钻孔通向地下几千米处,采集2万件样品进行化学分析,一一排除,最终确定金矿富集区。”山东黄金综合部副总赵立峰说。
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