论海平面变化与层控矿床成因

桂北及桂中大瑶山西侧泥盆纪层控型站矿床成因研究表明，矿床形成赋矿盆地的海平面变化密切相关，它们是“层、系、相、位”四位一体主因素地质场作用的结果，这一新的矿床成因新模式可以概括为：区域赋矿层位与层序边界面关系密切，研究区内共划分出７个 序边界面，其中ＳＢ１（Ｉ），ＳＢ３（Ⅲ）及ＳＢ７（Ｉ）是主要的区域性赋 层位；矿体一般产于Ｉ型层序边界面之上，或产于Ⅱ，Ⅲ层序边界面之下；容矿主岩与一定的沉积体系域     

构造因素对半地堑盆地的层序充填的影响

运用平衡剖面分析和构造物理模拟实验方法研究了典型铲式正断层模型上盘盆地的发育过程．研究表明，铲式正断层的产状以及断层上盘的变形方式直接影响上盘盆地的形态和沉积层序结构．简单铲式正断层的上盘发育相对简单的半地堑盆地，复杂铲式（坡坪式）正断层的上盘则发育包含有内部次级背斜凸起和向斜凹陷的复式半地堑，而且半地堑盆地的宽度与拆离断层面深度成正比．在沉积物补偿充填的情况下，渐进伸展将使半地堑的宽度也保持不变，从而使半地堑构造斜坡上产生“视水退”的层序结构现象，并且使盆地中“垂向加积”的沉积层序演变为宏观上“侧向加积”的沉积层序．这种由构造因素对半地堑盆地的层序充填的影响在渤海湾盆地的部分老第三纪断陷中得到印证．     

Estimation of seismic stress drop from the peak velocity of ground motion

ＥｓｔｉｍａｔｉｏｎｏｆｓｅｉｓｍｉｃｓｔｒｅｓｄｒｏｐｆｒｏｍｔｈｅｐｅａｋｖｅｌｏｃｉｔｙｏｆｇｒｏｕｎｄｍｏｔｉｏｎＪＩＡＺＨＥＮＧＱＩＮ（秦嘉政）ＺＵＹＩＮＬＩＵ（刘祖荫）ＸＩＡＯＤＯＮＧＱＩＡＮ（钱晓东）ＱＩＮＧＹＩＮＸＩＥ（谢庆...     

逆延华南气温序列方法的探讨

本文用香港１８８４－１９８３年逐年１月平均气温代表冬温，把它的年际变化时间序列作为原样本进行了谱分析，从中提取有代表性的周期波，用谱波分析和方差分析法，对选出来的周期波延，迭加，拟合成新的冬温时间序列。用地方志的冻灾史料进行了检验，结果９５％以上的冻灾年与新序列的冷冬年对应；冬季应温多出现连续性冷冬年，史料和新序列也有很好的一致性。     

Well-log correlation using a back-propagation neural network

We present a back-propagation neural network with an input layer in the form of a tapped delay line wich can be trained effectively on one or several well logs to recognize a particular geological marker. Subsequently, the neural network proposes locations of this marker on other wells in the field. Another neural network, similar in architecture to the first one, performs the same task for secondary markers using, in addition to the well logs, a depth reference function to the first marker. This method is shown to have better performance and better discrimination than standard cross-correlation techniques. It lends itself well for an interactive implementation on a workstation.     

巴里坤盆地现代气候波动及近250年来的冷暖变化

通过单相关普查找出巴里坤山区年表7的生长限制因子为上年6—7月均温,从而得到了巴里坤近250a来冷暖变化的替代序列。该序列的低通滤波曲线,揭示了近250a来的冷暖变化事实。方差分析指出,巴里坤冷暖变化的主要周期为126a。温度曲线与天山冰川进退时期相吻合。     

澜沧—耿马地震发震构造初步研究

本文根据澜沧—耿马地震形变带、极震区及余震序列分布特征,分析了7.6和7.2级地震的发震构造,认为北北西向旱母坝断层是7.2级地震的发震构造,7.6级地震的发震构造不是一条单一的断层,北西向木嘎断裂和北北西向澜沧—勐海断裂均有明显破裂表现,这一特点与震区复杂的地质构造背景有密切联系。     

快速射线追踪及其在地震层析中的应用

在地震层析研究中,常常涉及地震波在非均匀介质中的传播路径问题,故快速射线追踪是不可缺少的工具。本文讨论了一种以三点法为基础的逐步逼近的射线追踪方法,其优点是计算速度快、精度高,适合地震层析研究的计算要求。     

Sedimentation, distribution and diagenesis of organic matter in a recent carbonate environment, Abu Dhabi, U.A.E.

In the modern hypersaline carbonate lagoon and sabkha sedimentary environments of Abu Dhabi (United Arab Emirates), three types of organic matter originate respectively from microbial mat, Avicennia mangrove, and Halodule lagoonal seagrass. The study of recent sedimentary processes and cross sections through the sabkha sediments lead to the definition of organo-sedimentary facies based on geochemical and sedimentological criteria. This permits the construction of an organo-sedimentary sequence which expresses the Holocene sedimentary record involving a transgressive and a regressive sequence. The various organic facies occur in both sequences.Heterogeneity within the individual organic facies reflects several factors, including sedimentation dynamics, mineral matrix, oxidation and reduction, and selective organic and mineral diagenesis. These parameters are discussed in terms of depositional environment and location within the organo-sedimentary sequence. Changes in distribution, quantity, and preservation potential of the buried organic matter are discussed in terms of sea level changes and sedimentary accretion rates.