The volcanogenic deposits hosted in differential yolcanic rock series and cogenetic deposits hosted in undifferential baste volcanic rock series have been divided and studied in this paper.
笔者通过研
，
了异火山岩
中的火山成因矿床和未异基性火山岩中的共生矿床，认为前者的金属聚集与岩浆异有密切关。
：以上例句、词性
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