Early Proterozoic high-pressure metamorphism in the Wutaishan.

五台山早元古代高压变质作用研究。

Uranium mineral is pitchblende which was formed in Lower Proterozoic.

铀矿物主要为沥青铀矿，形成于早元古代。

The ore bed hosts in boracic granulite of Lieryu formation, Liaohe group of lower proterozoic.

矿层赋存于早元古界辽河群里尔峪组含硼变粒岩段。

At present, the age of storm deposits reported in China may be traced back to late proterozoic.

目前我国已报导的风暴沉积时代可追溯到晚元古代。

Early Proterozoic Tongbaishan group cannot be the source rock of the granite by study in detail.

详细的研究表明了早元古界桐柏山群不能成为老湾花岗岩的源岩。