Phases Representing Source Lengths of Tsunami in Tide Gauge Records

We identified a phase representing the source length of tsunami's in the tide gauge records around Japan. This phase was observed at tide stations, located in the direction of the long axis of the sources, for four large tsunamis: 1964 Niigata, 1968 Tokachi-oki, 1983 Nihonkaichubu, and 1993 Hokkaido-nanseioki. The phase consists of two continuous crests starting as the initial arrival and has a time length of 15–47 minutes. This is the time required to propagate across the source area along the long axis. Strong evidence that the phase is generated at the source is the good correlation between waveform observed at one side and time-inversed waveform at another side. The correlation results from the instantaneous generation of the source. The source lengths of 74–254 km were obtained under an assumption of sea depths at the sources and verified to coincide with ones within a relative error of 15% that were previously obtained by other methods.     

The deep-lake deposit in the Upper Triassic Yanchang Formation in Ordos Basin, China and its significance for oil-gas accumulation

The deep-lake facies of the Yanchang Formation represents a large outflowing lake basin in the Ordos area. Its deposition can be divided into four stages lake genetic and expanding stage, peak stage, inversion stage and dying stage. All the stages are obviously consistent with the evolution of depositional environment and the paleoclimate in the region. The study indicates that the lake basin has evolution fluctuations from highstand to lowstand for four times in its evolution history, and the deposition center of the lake has not obviously moved, staying along the Huachi-Yijun belt. The deep lake sedimentary system mainly consists of deep water deltas and turbidite fans during the entire evolution course of the lake basin in the Late Triassic. The former mainly developed on the slope of steep shore of the delta in the early period of the deep-water expansion and gradually experienced a big shift from deep-water deltas to shallow-water platform delta. And the latter appeared almost in all the above stages and had two types of turbidite fans, slope-moving turbidite fans and slump turbidite fans. The slope-moving turbidite fans have relatively complete facies belts overlapping one another vertically and consist of the slope channel of inter fans, the turbidite channel, inter turbidite channel and turbidite channel front of middle fans and outer fans (or lakebottom plain). However, the slide-moving turbidity fans are formed in the deep lake with their microfacies difficult to be distinguished, and only the center microfacies and edge microfacies can be determined. The two types of the turbidity fans are similarly distributing in the near-root-slope and far-root-slope regions. The deep-lake deposition governs the distribution of the hydrocarbon and reservoir, while the slope-moving turbidite fans are excellent reservoirs for oil-gas exploration due to their great thickness, widespread distribution and accumulation properties.     

一种附约束的单频单历元GPS双差相位解算方法

在各类变形观测中，存在着2次观测的变形值不大及各种变形方向和大小可以比较精确预测等特点，可以把这些特征作为约束条件，对GPS单历元相位观测方程进行求解。基于以上几点，提出了一种含约束条件的单频单历元GPS相位求解算法和简单实用的模糊度搜索方法，本方法据观测值直接估计模糊度参数，并根据求出的模糊度估值进行搜索，还分析了最优解的获得和检验方法，最后用2个实例说明了该法的有效性和实用性。     

相位激电法(偶极-偶极)单频电磁耦合校正方法

主要介绍一种相位激电法(偶极—偶极,以下简称偶极)电磁耦合校正方法,其原理是将视电阻率近似视为均匀大地电阻率,利用均匀大地条件下偶极装置电磁感应响应的正演计算方法,算出电磁感应响应,再将其从观测的总响应中去除,从而达到电磁耦合校正的目的。     

闽台地震速报技术研究

本文通过系统地分析台网正式运行以来记录到主要的网内、网缘、网外地震的各种震相特征和定位参数 ,总结研究各区的震相特征、台站记录状况和震级的误差 ,力争提高台网地震速报的速度和精度。     

福州、小陶地震速报技术研究

本文通过分析福州、小陶地震的波形记录及各种定位参数 ,总结了该地区的震相特征和各台的震级情况 ,结合地震速报的规程 ,提出了对这两个地区地震速报的建议。     

黄磷电炉烟尘中各种磷化合物的化学物相分析

对黄磷电炉烟尘中各种形态的磷化合物进行了化学物相分析，得出元素磷、水溶性低价磷化合物、水溶性高价磷化合物、酸溶性高价磷化合物、酸溶性低价磷化合物、酸不溶性磷化合物在黄磷电炉烟尘中的含量，并对黄磷电炉烟尘的综合利用提出了建议。     

土地覆被变化对陆地碳循环的影响—以黄河三角洲河口地区为例

土地利用/土地覆被变化是全球变化研究的重点，是影响陆地碳循环的一个重要因子。该文对黄河三角洲河口地区1992年和1996年9月份的TM影像进行非监督分类，做出该地区土地覆被类型分布图，以及估算土地覆被类型的变化面积，计算结果显示1992年该研究地区植被碳库和土壤碳库分别为11.43×10     

双重介质含水层中井水位潮汐相位滞后现象的理论分析

简略地介绍了双重介质含水层模型；推导出引潮力作用下双重介质含水层中渗流运动的偏微分方程；将此泛定的方程与潜水的Boulton方程进行数学类比，从而得出一个新的迟后给水项，为解释固体潮致井水位振荡相位滞后现象奠定了物理基础；通过对该泛定方程的分析，还发现该迟后给水项与深部含水层中存在的一种潮汐液流振荡现象有关．      

塔里木盆地轮南地区油气运移的路径、期次及方向研究

本文通过对塔里木盆地轮南地区及附近的钻井（出油井和未出油井）中揭示的裂缝，裂缝与成岩序列的穿插关系，连通砂体及断层和不整合面附近的矿物及矿物中流体包裹体研究，对塔里木盆地轮南地区油气运移路径和期次进行了探讨。通过研究指出了塔里木盆地轮南地区主要经历了3期大规模的油气运聚，地层之间的不整合面为油气横向运移的主要通道。高角度的裂隙及微裂缝为纵向运移主要通道。第一期油气运聚主要发生于海西期，第二期油气运聚主要发生在14－17Ma；第3期油气运聚主要发生在最近的5Ma以来。第一期油气运聚主要为自塔北隆起的西南，南向北，以横向运移为主；第二，第三期运聚主要自西南，南向北，自东向西运移，但主要以垂向运移为主。