云南三江一河典型地区河谷第四系发育特征

三江一河（金沙江、怒江、澜沧江、红河是流经云南境内的４条主体水系，将上述４条河流河谷第四系的野外观察加以总结得出；金沙江河谷局部发育早一中更新世的湖相层和河湖相层，常形成晚期阶地的基座，晚更新世至全新世冲积层构成四级阶地；怒江河谷第四系发育较差，在六库的上游河谷中冲积层极不发育，只有局部地方有少量的河漫滩砂砾层（全新世），在六库至过街河段中，尤其是过街盆地，发育有中更新世至全新世的冲积层和洪积层，前者构成五级阶地，后者形成巨大的洪积扇分布在河流右岸的谷底或苍坡上；澜沧江除景洪、勐罕（橄榄坝）盆地外，其它河段主要为峡谷，第四系很少，在景洪盆地中发育有第二、第一级阶地和河漫滩冲积层；红河的第四系有中更新世至全新世的冲积层，并构成五级阶地。基于上述第四系特点，简要地讨论了这４条河流的形成时代。     

Trace elements in alluvia of the upper Vistula as indicators of palaeohydrology

In the Vistula valley near Góra, at the northern foreland of the Carpathians Mountains, there are young alluvia deposited in the historical period. These alluvia are difficult to date precisely because of the lack of organic interbedded material. In the Vistula drainage basin upstream of Góra since the second half of 18th century small centres of metal, textile, motor, and petrochemical industries have been developed. Concentrations of trace elements such as: Cr, Mn, Co, Ni, Cu, Zn, Cd, Pb, and of some macroelements were used as indicators of the age of different alluvial fills. The main part of the Vistula valley floor was built up by sediment accumulation before the development of industry but after the medieval phase of rural colonization of the Carpathians. Deposits filling the abandoned channels dissecting the valley floor have an increased content of some trace elements and deposits date from the second half of the 18th century, when the first foundries and blacksmith's shops were developed. A drastic increase of concentration of the most abundant trace elements in the youngest alluvial fill indicates that the fill dates from the last decade of rapid industrial development.     

武昌电离层E-F谷区白天变化形态

本文利用文献[4]的分析程序对武昌地区三年共300多张频高图作了剖面换算和统计分析,得出白天E-F谷区电离的基本形态并发现一些新的变化特征;对分析结果的可能原因提出了讨论。     

Geomorphological evolution of a Lowland valley system during the Weichselian

Weichselian geomorphological and fluvial evolution has been recorded in the valley fill of the Reusel, a small tributary of the lower Maas river. It has been studied by means of borehole sections. A first deep incision into the substratum occurred during the Early Weichselian-Lower Pleniglacial. This was followed by aggradation, at first by a braided river, at a later date by a meandering river, dating respectively from the Lower and Middle Pleniglacial. The Upper Pleniglacial aggradation again points to a braided river system. The end of the Pleniglacial is characterized by aeolian infilling of the valley and decreasing carrying capacity of the river.     

吉南古元古代集安群泥质变质岩P—T—t轨迹及其地质意义

吉南古元古代分布区大地构造划分为辽吉裂谷系和浑江裂陷槽，集安群是辽吉裂谷系早期产物。泥质变质岩呈北东向分布于裂谷带内，经历了形成期后的中高级变质作用。本文在岩石建造、地质构造等研究基础上，通过变质作用研究，利用变质石榴石环带分析方法，建立了集安泥质变质岩Ｐ－Ｔ－ｔ轨迹。该轨迹表明集安群形成以来经历了两次拉张变质作用。在变质作用动态过程中，泥质原岩发生变质变形，Ｐ－Ｔ－ｔ轨迹反映了该区古元古代地质演     

大陆裂谷研究中的几个前沿课题

本文强调研究大陆裂谷具有重要的理论和实践意义，重点评述了当前大陆裂谷研究中的几个前沿课题：（１）建立大陆裂谷深部结构模式，介绍了张性破裂模式和地幔柱模式；（２）研究大陆裂谷与板块构造关系，认为大陆裂谷的发育与变化的板块运动密切相关；（３）探讨大陆裂谷的热流作用，证实了裂谷深部存在高温驱动的流体和热循环，推测这里可能就是幼年大洋产生的地带；（４）总结大陆裂谷成因类型，根据地球动力学状态划分了五种类型；（５）完善大陆裂谷研究思路与方法，提出多数大陆裂谷为一复杂的动力体系，系统论是全面研究这一复杂动力体系的有效方法。     

圆弧型沉积盆地对平面SH波的散射

采用波函数展开方法给出圆弧型沉积盆地对面ＳＨ波二维散射问题的封闭级数解答。利用外域Ｇｒａｆ加法公式将解答归结为无穷代数方程组的求解。通过截断计算得到解答的数值结果，并通过连续条件的满足程度检验了截断计算的精度。将本文结果已有的近似解析解进行比较，指出了近似解答的误差来源和适用范围。给出一些典型算例说明盆地深度比对地震动的复杂作用。     

近百年长江中游旱涝的变化

利用史料和器测雨量记录重建的近百年长江中游区域平均逐年旱涝等级指数序列研究了旱涝变化特征，发现：（１）２０世纪前涝后旱，（２）２２年、５－６年和２－３年的准周期振动，（３）６个交替出现的旱涝阶段。     

北祁连早古生代大地构造演化

早古生代北祁连是一个陆间微洋盆。震旦纪时,北祁连开始从华北板块中解体出来。主要裂谷作用发生于寒武世。北祁连地槽主要闭合期为晚奥陶世和早、中志留世。晚志留世和早泥盆世经历了复杂的消减作用。