Permian is broadly distributed in Nor th Xinjiang area, and source rocks are principally developed in upper member of Middle Per-main and upper member of Lower Permian.
北疆地区二叠系广泛分布，中二叠统上段和下二叠统上段是主要的烃源岩发育段。
Vertically, 3sets of source rocks including the Lower Cambrian, the Middle-o-Upper Ordovician-Lower Silurian and the Permian were developed in Chinese Paleozoic Marine basins.
研究认为中国古生代海相盆地在纵向上主要发育下寒武统、中上奥陶统—下志留统和二叠系3套烃源岩。
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