小型蒸发器失真记录分析

为提高小型蒸发器观测记录的准确性,对德州1998年1月至2007年12月蒸发量失真记录（负值、偏大可用、缺测记录）,结合当时天气状况等气象因素进行对比分析。结果表明,负值记录占失真记录的54．8％,集中在11至次年2月,多发生在非阵性的小雨（雪）、连阴雨、大雾天气;偏大可用记录、缺测记录多集中在6--8月,多发生在阵性强降水和湿度小、日照强、风大天气;造成失真记录的原因有人为操作不当、特殊天气、操作不科学等因素;针对不同天气条件下避免失真记录的发生提出了相应的处理方法。     

近震相对定位法和南黄海地震序列的时空分布

本文根据相对定位法原理,建立了使用Pn震相和拟牛顿最优化法测定地震空间位置和发震时刻的方法及程序,並对1984年5月21日南黄海地震序列进行了测定。     

几种固沙植物的水分关系

本文研究对象是甘肃省河西走廊中部地区几种固沙植物和地带性旱生植物。在测定其水势、束缚水含量、自由水含量、蒸腾强度和持水力等生态生理指标的基础上分析讨论了各个植物种水分关系的特点和适应干旱环境的方式。     

1979年6、7月份我国东部地区的大尺度涡旋水汽输送

本文计算了1979年6、7月份我国东部地区大气中的水汽涡旋输送。分析了垂直积分涡旋通量场和它的纬、经向分量场的主要特征,以及纬、经向涡旋通量在水汽总输送中的贡献。      

上地幔低速层对670km间断面PdSwr震相影响的探讨

比较详细地研究了670km深度间断面PdSwr震相的一些性质,从理论上对该震相进行了一些初步分析,讨论了在上地幔低速层影响下,该震相的射线离源角与射线路径、震中距、走时及相对振幅之间的关系;初步指出了该震相在实际地震观测图上应该具有的特征．PdSwr震相存在于震中距为13.5～96.5范围内．当＞33时,该震相起始处分辨程度较好,相对容易识别;在13.5＜＜33范围,PdSwr震相的走时曲线由于上地幔低速带及其下部地震波速度的相对快速增加所引起的弱环圈效应,记录到的PdSwr震相波形复杂,较难分辨．      

SLC Analysis on Earthquake Activity in the Regions of Sichuan and Yunnan of China

Using the method of Single-link Cluster(SLC),analyzing the pattern of time sliding of SLCparameters,the earthquake activity in the western Sichuan-Yunnan of China is studiedcombining with the regional earthquake catalogue since 1970 and the tectonic background.Comparing with the high level of earthquake activity in 1970’s and the low in 1980’s,theearthquake activity is in general at the middle level in 1990’s.This paper suggests that SLCmethod,which considers the temporal and spatial relationship among earthquake events,could be adopted to analyze the trend of regional earthquake activity,it is very useful forstudying seismic activity.     

测定震源深度的意义的初步讨论

在地震目录中，震源深度是地震学最基本的参数之一，然而它也是一个最不易测准的参数，ＰＤＥ报告中的震源深度以及ＵＳＧＳ和Ｈａｒｖａｒｄ大学的ＣＭＴ反演的矩心深度和利用宽频带波形的深度震相资料获得的震源深度各不相同，其含义也不同，而宽频带波形模拟得到又是一种破裂“核心”的深度。本文对不同测量手段的震源深度的不同物理意义做了初步的探讨。     

北部湾X1钻孔岩芯沉积物的Ⅹ射线衍射分析研究

X射线技术在结晶矿物学上已得到广泛的应用,它测量精度较高,快速简便,对样品无破坏作用,是地质研究中的重要手段之一,它还广泛地用于大陆架地区的沉积物研究(俞旭等,1982; Devine,1972)。本文将对北部湾东北部x1钻孔近百米的沉积物岩芯全样进行X射线衍射定量分析研究,并根据矿物组合特征,探讨北部湾沉积区的沉积环境及演化过程。     

The origin of the Tongkeng-Changpo tin deposit,Dachang metal district,Guangxi, China: clues from fluid inclusions and He isotope systematics

Tongkeng-Changpo is the largest tin deposit within the giant Dachang polymetallic tin ore field in Guangxi, southern China, which is part of a large skarn system associated with Cretaceous granitoids. The Tongkeng-Changpo mineralization consists of veins and stockworks in the upper levels and replacement stratiform orebodies (mantos) at lower levels. Based on textural relationships, three major mineralizing stages can be recognized: stage I with cassiterite, sulphides, stannite, tourmaline, and quartz; stage II with cassiterite, sulphides, sulphosalts, quartz, and calcite; and stage III with calcite as the main phase. The study of fluid inclusions has shown that there are two main fluid types: CO₂ and NaCl-H₂O. Homogenization temperatures are 270 to 365°C, 210 to 240°C, and 140 to 190°C for stages I, II, and III, respectively. Salinities range from 1 to 7 wt.% NaCl equiv. in the early ore stage and 3 to 10 wt.% NaCl equiv. in the late stages. Laser Raman Spectroscopy indicates that the inclusion fluids in stages I and II were of carbono-aqueous composition, with minor amounts of CH₄ and H₂S, whereas those in stage III were aqueous. Helium isotopic analyses of inclusion fluids indicate that the ³He/⁴He ratios in the ore veins are in between 1.2 to 2.9 Ra (Ra = 1.4 × 10⁻⁶, modern atmospheric ratio), and range from 1.6 to 2.5 Ra in the stratiform orebodies. This range of ³He/⁴He ratios is significantly higher than that of crustal fluids (0.01–0.05 Ra). The similar characteristics of fluid inclusions and their He isotopic composition, as well as age constraints, indicate that the ore veins and stratiform orebodies of the Tongkeng-Changpo deposit formed from the same hydrothermal system, likely related to granite intrusions of the Mesozoic Yanshanian tectono-thermal event. In addition, the high R/Ra ratios indicate a mantle contribution in the ore fluids.     

Preliminary Discussion on the Implication of Determination of Source Depth of Earthquakes

In an earthquake catalog,the source depth of earthquakes is one of the most basic parameters; however it is also one of the most difficult to measure.The source depths in the PDE bulletin,the centroid depths from CMT inversion of USGS and Harvard University,and those obtained by depth phases of broadband waveform data are not equal to each other,and they are also have different meanings.Also,the depth obtained from broadband waveform modeling is another kind of depth of different a rupture "core." This paper preliminarily discusses the physical implication of the source depth of earthquakes with different measuring methods.