胶莱盆地东缘早白垩世莱阳群沉积序列及岩相古地理

胶莱盆地东缘早白垩世早期莱阳群沉积体现了湖盆由开始形成—鼎盛—萎缩消亡的全过程,发育由冲洪积相—湖相—三角洲相—河流相沉积的完整序列,且由东至西,由湖相到河流相逐渐过渡;古水流方向显示莱阳期盆地中心位于朱吴断裂、海阳断裂带之间,以断裂带为界,以西水流方向大致为由NW至SE向,以东水流方向则为由SE至NW向;早白垩世早期莱阳期盆地的形成与演化明显受区域性牟(平)-即(墨)断裂带活动所控制。

Analysis on Sedimentary Sequence and Lithofacies Paleogeography of Early Cretaceous Laiyang Group in Eastern Jiaolai Basin

The sedimentary of Laiyang group of early Cretaceous in eastern Jiaolai basin reflects the evolution of the lake basin from forming, prospering, shrinking to vanishing. The complete sequence of alluviallacustrinedeltafluvial facies deposits developed, and gradually transited from lake facies to fluvial facies from east to west. As showed by the direction of paleocurrent, the center of Laiyang basin is located between Zhuwu fault and Haiyang fault zone. The fault zone is the boundary, the direction of west flow is roughly from NW to SE, and the direction of east flow is from SE to NW. The formation and evolution of Yangshi basin are obviously controlled by regional activity of Mouping Jimo fault belt.