...中南大学学报（自然科学版、英文版） 关键字: 早元古代; 逆冲构造; 造山作用; 华北克拉通[gap=684]Key words: Early Proterozoic; thrust structure; orogenesis; North China Craton...
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五台山早元古代高压变质作用研究。
Early Proterozoic high-pressure metamorphism in the Wutaishan.
铀矿物主要为沥青铀矿，形成于早元古代。
Uranium mineral is pitchblende which was formed in Lower Proterozoic.
早元古代的大气圈、水圈与晚太古代相似，仍为缺氧性质。
The early Proterozoic atmosphere and hydrosphere are similar to those of Archaeozoic in being still absent in oxygen.
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