telescoped ore

The primary ores of the Laozuoshan gold deposit is a heavily disseminated and massive gold ores the main metallic mineral of which is pyrrhotite that account for approximately 11% occurring in migmatitic granite in disseminative and massive form and its gangue minerals take about 80% with quartz and feldspar as main minerals.

老柞山金矿原生矿石为稠密浸染状、致密块状金矿石,矿石中主要金属矿物为磁黄铁矿,约占11%,磁黄铁矿以浸染、致密块状分布于混合花岗岩中;脉石矿物约占80%,以石英、长石为主。

However, the primary diamond deposits worthy of exploration in terms of economic value occur only in the kimberlite and lamproite.

目前所知产金刚石的岩石类型包括金伯利岩、钾镁煌斑岩、榴辉岩、蛇绿岩套、碱性超基性杂岩、碱性超基性煌斑岩和橄榄岩类 (方辉橄榄岩、纯橄榄岩等 )等偏碱性超镁铁质岩石 ,而有经济价值的金刚石原生矿床仅见于金伯利岩和钾镁煌斑岩中 ,除此之外的其他岩石类型中仅见有少量微粒金刚石 。