金刚石砂矿
- 网络alluvial diamond
金刚石砂矿-
沅江流域宝石级金刚石砂矿特征
Characteristics of the jewel grade placer diamond deposit in Yuanjiang River Valley
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从褐斑的特点来看，湖南金刚石在形成砂矿后可能经过热变质作用，现代河流砂矿只是对原砂矿进行再次改造。
The alluvium bearing diamonds were experienced thermal metamorphism , and reformed by modern river again .
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沅水流域分布4个金刚石砂矿床，供给金刚石砂矿的含金刚石岩体具多期多源特点。
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 .