Binomial model on seismic risk analysis

ＢｉｎｏｍｉａｌｍｏｄｅｌｏｎｓｅｉｓｍｉｃｒｉｓｋａｎａｌｙｓｉｓＪｉａｎＷＡＮＧ（王健）ａｎｄＺｈｅｎ－ＬｉａｎｇＳＨＩ（时振梁）（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ＳｔａｔｅＳｅｉｓｍｏｌｏｇｉｃａｌＢｕｒｅａｕ，Ｂｅｉｊｉｎｇ１００...     

首都圈地区地震活动的分期与分区研究

本文通过对首都圈地区（北纬３８．５°至４１．０°，东经１１３．０°至１２０．０°）公元１５００年以来Ｍ≥５地震的系统分析，并应用７０年代以来所取得的该地区最新地球物理场的有关资料进行分区后，发现该地区５级以上地震存在较明显的成组发生及有１１年的时段性特征，且每一组的活动具有地区性特征。这一现象对首都圈地区５级以上的地震的监视预报具有一定的意义。     

南岭地区脉状黑钨矿床成矿母岩的石榴子石研究

根据对南岭地区某些脉状黑钨矿床成矿母岩的石榴子石研究,石榴子石分子的组成是:锰铝榴石55.6％,铁铝榴石39.3％,镁铝榴石1.95％,钙铁榴石3.1％。它们属于锰铝-铁铝榴石类质同象的成分系列。它们的红外光谱表明,这些石榴子石是富锰的锰铝榴石,因为它们的L频带值为302—308cm~(-1)。K频带值为340—343cm~(1-)。L频带值随矿物的MnO含量增加而降低。穆斯鲍尔谱表明,它们的化学位移值为1.247—1.269mm/s,四极分裂值为3.54—3.58mm/s,线宽值为0.269—0.349mm/s。MnO含量增加,FeO含量减少,四极分裂值升高。它们是从壳源型花岗岩浆的晚期富锰分异产物中结晶的。石榴子石的形成温度为550—860℃,压力为1—4kb。     

A comparison of two avalanche-models with exemplary avalanches of Tyrol and Switzerland and the effects to hazard zoning

For the purposes of a thesis at the Institute of avalanche and torrent control at the university of agriculture in Vienna a comparison of two avalanche-models, a hydraulic one from Voellmy/Salm/Gubler and a statistical one from Laatsch/Zenke/Dankerl with exemplary exactly known avalanches of Tyrol and Switzerland was started in 1993. The result of this work was that both models failed by the calculation of avalanches with high recurrence intervals (over 300 years). For the calculation of avalanches with recurrence intervals under 300 years the results of both models are regular. The conclusion is that a combination of two models i.e. a hydraulic one improved by statistical calculations will be the best.     

Ultrahigh-pressure garnet lherzolite from Chijiadian, Rongcheng County, in the Su-Lu region of eastern China

Abstract Petrological studies of a serpentinized garnet lherzolite body in Rongcheng of the Su-Lu region of eastern China revealed unusually high pressure. Spinel lherzolite probably in a subducting slab was transformed to garnet lherzolite at mantle depth. During exhumation, they were subsequently subjected to the granulite and then amphibolite overprinting and a phase of serpentinization. The peak P–T conditions of the garnet lherzolite estimated after detailed analysis of the metamorphic texture are 4–5 GPa and 820°C or 5–6 GPa and 780°C, depending on the chosen geothermobarometers. The lower dP/dT of the garnet lherzolite can be interpreted as the results of subduction of an old (say 100 Ma older than the time of collision) and cold, slab underneath the margin of the Sino–Korean craton.     

柿竹园夕卡岩中钙铝-钙铁榴石系列石榴子石形成条件的实验研究

柿竹园夕卡岩中有早、晚形成的两种产状石榴子石。本文为查明其形成物理化学条件及与矿化的关系,采用矿区天然花岗岩、灰岩和夕卡岩化早期形成的石榴子石为试样进行了模拟实验研究。实验结果表明:夕卡岩化早期石榴子石是在温度400—750℃,压力500—1000bar,pH=5—8条件下,由富含Si、Al、Fe、Cl、F等组分的热液与上泥盆统佘田桥组灰岩交代反应形成的;晚期石榴子石是在温度250—700℃,压力500—1000bar,pH=5—14条件下,由富含Si、Al、F等组分的带钨溶液与早期石榴子石交代反应产生重结晶作用形成的。     

利用"激电异常-铜矿体-磁异常"有序分带的模式判断铜矿体赋存位置

以土层、延东斑铜矿的成矿特征为已知,简要介绍"激电异常-铜矿体-磁异常"有序分带的模式,重点介绍了又有磁异常又有激电异常时,隐伏矿体赋存位置的判断方法,以及仅有激电异常无相关的磁异常不成矿的原因。     

贵州地壳表层构造地球化学分区及其意义

根据贵州所处大地构造位置，在前人划分的扬子陆块、江南造山带和右江造山带构造单元的基础上，结合水系沉积物测量区域化探扫面成果，划分出四川盆地边缘SiO2-Na2O高背景地球化学区，黔北隆起F－CaO-MgO及亲基性元素高背景地球化学区，黔西断陷Au-As-Sb-Cu-Pb-Zn-Fe3O3亲硫元素及亲基性元素强聚集地球化学区，黔南台陷Cd-Hg-Sb-Ag-SiO2高背景地球化学区，江南造山带Ba-Ag-Al2O3－K2O-Na2O高背景地球化学区和右江造山带B－Au-Sb-SiO2高背景地球化学区等6个地球化学区。结合有关资料还在阐述各区地球化学特征的基础上，探讨了它们的科学意义。     

福建省矿产资源潜力的地球化学预测

利用区域化探归面（水系沉积物测量）资料，使用区域浓度克拉克值及变化系数两个参数，对福建省32种元素的资源潜力进行了排序，认为在目前国家的导向矿种中，福建省的资源潜力依次为锌－银－铅－锡－金－铜－钼。同时根据谢学锦院士提出的地球化学块体学块体的理论和方法，预测了政和Au地球化学块体、龙岩中甲Cu地球化学块体、大田Pb地球化学块体的资源潜力，分别为金430吨、铜625万吨、铅408万吨。初步探讨了成矿系统的元素分带及地球化学模式研究的意义和方法，认为这项研究对上述地区的打矿突破具有重要作用。     

Design of environmental decision support system and its application to water quality management

1 IntroductionEnvironmental decision support systems could be divided into two categories by their organizational form and system functions. One is regional environmental analytical system based on commercial GIS and assisted by environmental models, such as BASINS developed by the American NEPA using ARC/VIEW as its user platform and including QUAL2E and NPSM as its prediction tools. The other is environmental information and prediction system based on mathematical models, such as…