多巴区幅地质调查新成果及主要进展 关键词 ：中侏罗世—早白垩世；席状岩墙群；角度不整合；印支运动；奥陶纪；志留纪；冈底斯 [gap=1490]Key words ： Middle Jurassic-Early Cretaceous； sheeted dike swarm； angular unconformity； Indosinian； Ordovician； Silurian； Ga
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Mineral , palaeontology , middle devonian , permian to early jurassic , and cretaceous.
收藏矿物、古生物学、中泥盆纪、二叠纪到早期的侏罗纪和白恶纪。
During Late Triassic to Early Jurassic, Marine sediments formed (sallow_bay facies or alternating continent_marine facies), and only continental facies deposited during Middle Jurassic to Cretaceous.
上三叠统—下侏罗统有海相地层(浅海海湾相或海陆交互相碎屑岩)分布，而中、上侏罗统及白垩系为陆相地层。
In these process of evolution, it deposited mainly hydrocarbon source rocks of lacustrine facies in the Early Cretaceous and secondary coal measures source rocks in Early-Middle Jurassic.
主要形成了下白垩统半深湖相烃源岩，其次为中下侏罗统煤系烃源岩。
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