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
砂矿床，供给金刚砂矿的含金刚岩体具多期多源特点。
的,产钻的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个金刚砂矿床，供给金刚砂矿的含金刚岩体具多期多源特点。
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