云南新平县双沟蛇绿岩稀土元素地球化学研究

双沟蛇绿岩中,变质橄榄岩的REE分布型式为LREE富集型,可能是富大离子亲石元素(LILE)组分交代造成的。地幔岩部分熔融生成的初始熔体LREE亏损,而辉绿岩和玄武岩则存在LREE亏损和富集两种型式,前者相当于N-MORB,后者相当于E-MORB。推测前者来源于亏损的软流圈地幔,而后者的地幔源区经历过一次富集LREE和LILE的事件。双沟蛇绿岩的REE特征暗示它可能形成于弧后盆地。     

中国近海海面地形的计算与研究

介绍了海面地形的研究现状,并根据几何水准求得了中国近海的海平面倾斜及其精度.给出应用水文资料计算中国近海海面地形的公式及其计算结果.探讨了由球函数模型计算中国近海海面地形的理论和方法,并对不同方法进行了比较,得出了一些有益的结论.     

多层递推平稳模型

通过对小概率事件历史样本作多层递推迭代，逐次改变引入样本数求取权函数，建立一种平稳统计模式。模式信息容量大，收敛快，克服了常规统计模式的局限性，在灾害性天气客观预报模型应用中取得了明显效果。     

内蒙古中部二叠纪碱性花岗岩及其地球动力学意义

西伯利亚板块南缘白音乌拉－东乌珠穆沁旗带的碱性花岗岩（Ｒｂ－Ｓｒ年龄２７６－２８６Ｍａ）生成于张性的构造环境，较西伯亚板块同中朝板块之间晚泥盆世－早石炭世的碰撞事件晚约６０Ｍａ，属于造山后的Ａ型花岗岩，可作为造山作用结束的标志。但在中朝板块北缘晚石炭世－二叠纪只发育钙碱性的晚造山花岗岩，直到三叠纪才出现碱性正长岩。相邻两大板块边缘之间岩浆活动的非对称性可能是受板块间面积和质量差别的制约。     

The Ground Deformation Disaster in the City of Tianjin Associated with the Tangshan Earthquake

In this paper,a study of the principal characteristics of the ground deformation disasters in the city of Tianjin caused by the Tangshan earthquake is based on the results from the recent remeasurements of the geodetic controlling network of Tianjin and from on-site investigations after the earthquake.These results show that only the ground deformation in the Ninghe and Hangu areas near the epicenter reflect directly the co-seismic crustal stress,while the serious ground deformation and the engineering earthquake damages in the urban districts of Tianjin are controlled to a great extent by the local engineering geological structures,showing a kind of secondary disaster.Several suggestions are also proposed in the paper concerning the counter-measures for reducing the earthquake damage in big cities.     

The Mathematic Models of the Kalman Filtering for Across-Fault Measurement

This paper makes a probe into the application of the Kalman filtering method to the data processing of across-fault measurements.On the basis of statistical regression,the mathematic and stochastic models of filtration are established by combining the regression method with Kalman filtering.In the filtering computation,not only the randomness of fault movements but also the time-dependent variation of environmental effects have been taken into consideration.By use of the adaptive filtering method,an estimation of the dynamic noise variance matrix is obtained through iteration.Models for one measuring line(leveling line or baseline),two measuring lines(both leveling lines or both baselines)and four measuring lines(two leveling lines and two baselines)are derived and established systematically.By means of these models,the data of across-fault measurements can be processed dynamically in real-time to provide the filtered values of height difference between benchmarks or baseline length at different time in     

霍州辛置桃沟矿泉水的形成条件及水质特征

桃沟矿泉水暴露于辛置煤矿的通风斜井中，为低矿化度、低钠、锶重碳酸钙镁型饮用天然矿泉水，在开发利用过程中应十分重视环境保护及卫生检测。     

山西101份天然矿泉水的细菌污染状况分析

本文对１９８７—１９９３年间，山西５０个矿泉水点１０１份饮用天然矿泉水细菌总数和总大肠菌群进行了检验，其中６４份合格，合格率为６３；３７％。表明山西饮用天然矿泉水源受微生物的污染较为严重，污染程度与水源出露形式和季节变化关系不明显，而主要与矿泉水出露环境的防护措施有密切关系。     

东山峰背斜寒武系地层中硼锂元素的指相意义

东山峰背斜寒武系地层分布区内，Ｂ，Ｌｉ元素的水系沉积物测量平均值分别为１７７．７８×１０－６、２２０．０×１０－６，衬值分别为２．３２、５．０７，Ｒｂ／ｋ比值为０．００６２。这些地球化学特征具典型的指相意义，反映出本区在早寒武世晚期至中、晚寒武世期间为一高盐度、强蒸发的泻湖相沉积环境，可与现代盐湖相环境类比。     

北京地区大灰厂组孢粉组合及其地质意义

大灰厂组沉积在北京西部大灰厂一带发育良好。该组由陆相火山碎屑砂岩、粉砂岩、页岩及砾岩组成，富含狼翅鱼、叶肢介、拟蜉蝣等动物化石和孢子花粉化石，厚度１２０－２００米。与下伏东狼沟组整合接触，与上覆辛庄组假整合接触。其孢粉组合是以ｃｌａｓｓｏｐｏｌｌｉｓ占显著优势为特征（６０－８０％）．含有较多Ｃｉｃａｔｒｉｃｏｓｉｓｐｏｒｉｔｅｓ，Ｌｙｇｏｄｉｕｍｓｐｏｒｉｔｅｓ及少量Ｃｉｃａｔｒｉｃｏｓｉｓｐｏｒｉｔｅｓ、Ａｐｐｅｎｄｉｃｉｓｐｏｒｉｔｅｓ、Ａｅｑｕｉｔｒｉｒａｄｉｔｅｓ、Ｈｓｕｉｓｐｏｒｉｔｅｓ及Ｄｅｎｓｏｉｓｐｏｒｉｔｅｓｖｅｌａｔｕｓ，Ｄ．ｍｉｃｒｏｒｕｇｕｌａｔｕｓ等。与国内外早白垩世的孢粉组合比较，时代为早白垩世韦尔登期。属于旱的热带和亚热带气候。