The native minerals originating from Tertiary basanite of Yaoshan formation,the placer is in water systems around Fangshan.

原生产于第三纪的尧山组玄武质碧玄岩中，则分布于方山周围的水系中。

Quartz, zircon, magnetite, gold are major constituents of littoral placers in Shandong province, while shell, ballstone, ilmenite, rutile being secondary.

山东省滨以石英、锆英石、磁、金等主,其壳、球石、钛、金红石等。

Regional volcanic strata are the source of placer gold and laterization process is the main stage of formation of placer gold.

区域火山岩地层是金的源，地表赤红壤化可能是金形成的主要阶段。

The types of deposits basically are differential metasomatism in the later magma, pneumatolytic hydrothermal process, pegmatite process, residual deposits and placer deposits.

床类型以岩浆晚期分异交代型、气成热液型、伟晶岩型、风化壳型和型主。

Four alluvial deposits distributing along Yuanjiang river and the diamondiferous rocks that supply diamonds to these placer deposits have striking properties of varied sources and multi-phases.

沅水流域分布4个金刚石床，供给金刚石的含金刚石岩体具多期多源特点。