The temporal analysis shows that Chinese gold placers were formed in the Quaternary whereas lode gold reserves are mainly of Jurassic-Cretaceous age, forming 64.
中国砂金矿主要形成在第四纪，而原生金矿则主要形成在侏罗—白垩纪（占原生金总储量64。
The salt-related tectonics in the Qiangtang basin mainly formed in late Jurassic and was further patterned during Cenozoic.
羌塘盆地盐相关构造形成于侏罗纪末并在新生代进一步定型。
Special petroleum geological and geochemical conditions lead to a special type of oils formed in the Middle Jurassic coal shale strata in the Minhe basin.
本文简要论述了民和盆地中侏罗统含煤及油页岩层系的生油特征，探讨了盆地独特的石油地质和地球化学条件。
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