The depositional character of zhuxiang formation in the basin reads as follows : a series of nne alluvial fan were formed along the fault . the half - deep lake to deep lake faces appeared by west side of the fault , towards the west the saucer lake faces , shore deposit and flood plain face appeared in proper order . the depositional center of lower cretaceous was formed in eastern part of the basin , and the depositional depth was pinch - out and thinning out from the east to the west 盆地内下白垩统朱巷组沉积特征表现为：沿郯庐断裂带呈北北东向广泛发育了冲积扇体系，从近断裂带西侧出现的半深湖-深湖相，向西依次为滨浅湖相到泛滥平原相的规律性分布，沉积厚度由东向西尖灭、超覆，构成了明显的东断西超的盆地构造格局，表明下白垩统的沉积中心依然位于盆地东部。
These phenomena show that the fault has strongly activities at the same time . at that time tan - lu fault zone occurred a large - scale left - lateral displacement . the strike - slip movement on the tan - lu fault zone cau sed the zhangbaling uplifting which became source region and the hefei basin appeared strike - slip flexure at the west side of the fault 说明了控盆断裂?郯庐断裂带在该时期具有强烈活动，且以大规模走滑运动为主，郯庐断裂带的走滑使得东侧张八岭进一步快速隆升，仍构成沉积物源系统；在断裂西侧，合肥盆地因走滑而挠曲，形成沉积可容空间。
Due to the west north direction subduction , fast collapse ( delamination ) may take place and the mantle plume emerged in ludong , in addition , owing to the subduction of pacific plate under eurasian , there appeared left - lateral advection and extension for tan - lu faults ( named as yishu fault in shandong ) , and together with the collapse of yanshanian orogenic belts , all induced the crustal extension in shandong 由于太平洋板块对欧亚板块的俯冲( nw向) ，鲁东地区岩石圈发生了快速拆沉减薄作用，同时鲁东地区也可能会出现地幔柱的活动；另外，在太平洋板块俯冲作用影响下，郯庐断裂(山东称沂沭断裂)带发生了大型左行走滑剪切和拉张活动。
Appearance of marginal faces , parallel depositional center near the tan - lu fault zone , the obvious faulted down boundary in the eastern part and the overlapping boundary from east to west inside the basin indicated that the fault zone occurred as the eastern boundary of the basin in jurassic and acted as provenance of the basin in east due to strike - slip uplifting of the zhangbaling belt 这些逆冲推覆构造在靠近郯庐断裂带附近，具有显著增多的特点；盆地内侏罗系地层在郯庐断裂带一侧广泛发育了边缘相及与断裂带平行的沉积中心，沉积厚度东厚西薄，在盆地东部形成了明显的断陷边界，向盆地内部北西方向则显示了沉积超覆边界的特征。
