下侏罗统含煤系是铀矿化赋存的有利部位。
Uranium mineralizations are hosted in the Middle-Lower Jurassic coal-bearing series.
我国东部火山岩型铀矿床基本上都产在侏罗、白垩系中。
The volcanic type uranium deposits in East China basically occur in Jurassic and Cretaceous systems.
灵武煤田的中侏罗统延安组含煤岩系为一湖泊三角洲沉积。
The middle Jurassic series Yanan Formation of in Lingwu coalfield is a lacustrine deltaic deposit.
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