宝石级金刚石的比例

2025年03月15日 20:09
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山东是我国金刚石储量和产量较多的省份之一。截至1987年年底,砂矿和原生矿累计探明储量合计10749651ct,占全国探明储量的45.5%,保有储量为9599045ct,占全国保有储量的43.1%,地质远景储量4266022ct,占全国地质远景储量的55.7%。在9599045ct保有储量中,宝石级金刚石储量为1740312ct,占全国总量的19.46%王致全等,1989;山东省地矿局第七地质大队,1990a)。

在勘探及开采到的金刚石样品中,不同矿带中宝石级金刚石的含量各不相同。常马庄矿带的胜利1号岩管中宝石级金刚石百分含量占样品总量的5%,西峪岩管群中宝石级金刚石百分含量占样品总量的6.3%;郯城砂矿(陈家埠)宝石级金刚石百分含量占样品总量的30%(王致全等,1989;山东省地矿局第七地质大队,1990a;b)。总的来说,山东蒙阴地区的金刚石质量稍差,内部包裹体较多,主要为工业级(85%)(王久华,2005),宝石级金刚石约为3%(陈征等,2003)。本次采矿现场统计数据则显示工业级占80.57%,宝石级可达到19.43%,较以往数据显示出近年山东宝石级金刚石的产量比例有所上升。

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