Ore prospect should be directed to PGE deposits both related to Emeishan basalt and black shale sequence.
要同时重视找寻与峨嵋山玄武岩有关和与黑色岩系有关的两类铂族矿床。
Perhaps the Proterozoic Nonesuch shale of the Superior Basin holds the record as the apparently effective source sequence with the biggest time-spread between deposition and expulsion.
也许苏必利尔盆地的元古界农萨奇页岩，拥有有效烃源岩层序中由沉积到排烃时间最长的记录。
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