宜昌附近第四纪断层研究的新进展

通过野外地震地质调查，发现：（１）北东向新场—古老背断裂带的地表形迹和更新世多期活动的地层、构造岩证据；（２）近南北向虎牙第四纪断层及其粘滑快速断错的剩余形变特征；（３）北西向天阳坪断裂带南支早第四纪粘滑快速断错的剩余形变特征及其上覆晚更新世末期堆积（１４Ｃ１６４００±４３９年）未受断错所揭示的时间上限约束。     

High-resolution seismic survey on the Rhine River in the northern Upper Rhine Graben

In the northern part of the Upper Rhine Graben (URG), a high-resolution seismic reflection survey was carried out on the Rhine River over a length of 80 km, and on its tributary Neckar over a length of 25 km. The seismic investigation provides new results to redefine the base of Quaternary fluvial sediments from Oppenheim upstream to the south of Mannheim. The standard Quaternary thickness map of Bartz (1974) was partially revised and completed. Maximum Pleistocene sediment thickness is documented in the area of Mannheim with approximately 225 m. The top of the Pliocene in this area is sub-horizontal and not faulted, and rises downstream continuously towards the fault block of Worms. Intercalated lacustrine pelitic layers play a main role in defining the litho-stratigraphy in this part of the URG. In the north of Worms, Pleistocene sediments are mainly coarse-grained. In the area of Worms, a Pleistocene tectonic phase along N–S striking normal faults with variable displacement along the strike is obvious.     

天津市西青区辛口镇郑庄子C6(C7)钻孔3.5 Ma以来的地层年代及沉积环境演化

对位于天津市西青区的C6(C7)钻孔进行了磁性地层学、14C测年、沉积旋回、孢粉地层学和有孔虫、介形类研究,研究结果表明:①第三系与第四系界限(N/Q)埋深323.90 m,早更新世与中更新世界限(Qp1/Qp2)埋深98.0 m,中更新世与晚更新世界限(Qp2/Qp3)埋深61.59 m,更新世与全新世界限(Qp/Q...     

DPQAC-PAC-MC复合改性粘土在不同介质中的絮凝行为研究

改性粘土法絮凝消除浮游微藻是我国迄今唯一得到大规模应用的有害赤潮应急处置方法,研发安全高效的改性粘土材料是该方法发展的重要方向之一.本文研究了双烷基聚氧乙烯基三季铵盐(DPQAC)与聚合氯化铝(PAC)复合改性粘土获得新材料DPQAC-PAC-MC在去离子水、海水及东海原甲藻藻液(Prorocentrum dongha...