Occasionally, when mining area occurs in the source area of eolian sand, the indicator element content obviously increases.

Hg则 从粗向细粒级含量逐渐增高,中间变化很小.但在风成沙来源地有矿区存在时, 则出现相应元素的明显升高.

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In West China, there is a great abundance of eolian sand in vest expanses of desert.

我国西部地区沙漠分布广泛,富产风积砂.

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