Doleritic veins are made sure of mantle source, which did not mix with upper crust matter.

辉绿岩脉是来自于幔源，没有受到上地壳物质的污染。

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Doleritic veins are made sure of mantle source, which did not mix with upper crust matter.

辉绿岩脉是来自于幔源，没有受到上地壳物质的污染。

youdao