区域站和基准站气溶胶的分析

文章讨论了秋季（1994年10月）和冬季（1995年1月）在中国西部青海省共和县瓦里关山（36°17′N，100°54′E，海拔3816 m）基准站和中国东北黑龙江省五常县的龙凤山（44°44′N，127°36′E，海拔331 m）及中国东南沿海的浙江省临安县的横畈乡（30°18′N，119°44′E，海拔131 m）两个区域本底站（上述3站均属WMO）所采集的气溶胶样品的质量浓度、可溶性离子浓度的时空分布特征和变化规律。初步得出:气溶胶质量浓度和可溶性离子浓度以临安为最高。其次是龙凤山，而瓦里关山为最低     

长白山天池火山密码破译势在必行

长白山天池火山是中新世以来多次喷发并造成严重灾害的火山。通过十几年的火山地质及火山地震监测研究认为长白山天池火山近期不会马上喷发，但它是一座具有潜在喷发危险性的活动火山，并提出建立长白山火山观测站的重要意义，讨论了天地火山密码的破译需要调动各方面有利因素和有利条件。     

一种适合定点使用的DTZ型质子旋进磁力仪

系统地介绍了ＤＴＺ系列质子旋进磁力仪的思路和性能特点，通过台站使用认为，ＤＴＺ系列仪器能满足地磁台观测精度的要求，具有实际使用的价值。     

单台测震分析与资料交换程序

按照地震台站测震分析处理过程,我们在长城0520DH微机上建立了一套地震分析与资料交换程序。该程序具有分析精度高、操作简便、易于掌握等特点,可供Ⅰ、Ⅱ类地震台站使用。     

湖州台的近震监测能力

本文根据湖州地震台DD-1地震仪记录的1980—1990年期间Δ<500km的近震资料和仪器放大倍率,利用理论计算Δ—Mmin曲线,b值检验3种方法,对湖州台的近震监测能力进行了估算和评价,得出了该台对目标监测区域内的有效监测震级。最后对区域地震台站的近震监测能力进行了讨论。     

淮阴台井下测震震级偏差初探

依据台站两年来实测的地震震级和江苏省区域测震台网定的震级进行比较,计算出各个地震的偏差值和台站的震级校正值,并获得相应的标准误差,最后对影响震级差值因素进行了探讨。     

Lg amplitude ratios H/Z and station terms in the six eastern provinces of China

Using the data set of about 1 Hz Lg amplitudes from 80 stations in the six eastern provinces of China, the ratios of horizontal to vertical amplitude of Lg waves,H/Z are determined. The mean lg(H/Z)-value is equal to 0.13. For the station bases of soft deposit,granite and sedimentary rock, lg(H/Z)-values average 0.55, 0.04 and 0.10, respectively. For the three kinds of station bases, the station terms of horizontal amplitude,C _h average 0.65, −0.09 and 0.00; that of vertical amplitude,C _z average 0.32, −0.04 and 0.00, respectively. There are the relations betweenC _h ,C _z and lg(H/Z):C _h =0.01+2.10C _z andC _h =−0.15+1.46 lg(H/Z). The Chinese version of this paper appeared in the Chinese edition ofActa Seismologica Sinica,13, 281–286, 1991. Project sponsored by the Chinese Joint Seismological Science Foundation.     

泥石流监测预警站的组建

泥石流监测预警站利用的是泥石流预警报系统,以便对泥石流进行监测后,作出泥石流预警报。泥石流预警报系统由三个子系统组成,这就是:1.暴雨类泥石流预报子系统;2.泥石流地声报警子系统;3.泥石流规模报警子系统。三个子系统分别用在泥石流监测预警站所属的雨量、地声、泥位三类泥石流监测点上。泥石流预警报系统由中国科学院东川泥石流观测研究站在蒋家沟研制而成,1985年底通过鉴定,获1986年度中国科学院科学技术进步三等奖。     

秦巴地区矿产资源和成矿分布规律

对秦巴地区的成矿地质构造进行了分区和分期,定量地论述了区域矿产资源的特色和组成总貌,全面系统地总结论述了7种矿床类型及其成矿特征,阐述了区域成矿分布规律,反映了该区矿产地质的研究现状。     

Barometric pumping effects on soil gas studies for geological and environmental characterization

Data from two free soil gas sampling programs are evaluated for the effects of barometric pumping over time on measured soil gas volumes. One program collected data from the trapped atmosphere immediately above two hazardous waste landfill areas. Of these areas, one had extremely high soil gas emanations, whereas the other had a more modest soil gas release. The second experimental program involved the collection of free soil gas samples on a rough grid with an approximate spacing of 1.6 km over a 720-sq-km area. This reconnaissance effort was designed to establish regional soil gas background values and to establish the utility of this method as a geological mapping tool in the Atlantic Coastal Plain. Methane, ethane, propane, and hydrogen data are used for this study. The data suggest that there is a predictable change in soil gas volume with a given change in barometric pressure. The rate of change is greater with large soil gas volumes in permeable soils versus lower soil gas volumes in impermeable soils; however, a simple linear relationship seems to generate a predictable curve with a margin of error of approximately 50%. Furthermore, the results of this study indicate that barometric pumping effects should be strongly considered during soil gas screening efforts at hazardous waste sites as well as in regional studies for hydrocarbon source potential mapping.