... biogenic element 生物起源元素 ; 生物元素 biogenic deposits 生物沉积物 biogenic motive 生物发生动机 ...
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biogenic ore deposits 生物成因矿床
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In this paper the genesis and formation periods of the placers (littoral, glacial and alluvial) and biogenic-biochemical sedimentary deposits are briefly discussed.
概述了滨海砂矿、冰川砂矿、冲积砂矿和生物、化学沉积矿产的成因及成矿期。
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