采卤对接井施工中的受控定向钻探技术

本文根据衡阳盆地岩盐矿床特定的地质条件，对比揭示了定向对接井设计施工中的技术要点及其对流采卤新工艺的优越性和高效益，论证了应用此采卤新工艺是高效开采衡阳式岩盐矿床的国际水平先进技术。     

湘鄂黔桂毗邻区扬子地台基底与第一盖层之探讨

毗邻区黄陵背斜裸露的崆岭群，系太古界结晶基底。该结晶基底上的冷家溪群，梵妆山群和四堡群为下元古界褶皱基底，并具“Ｐ型克拉通”之基底结构。而神农架群，板溪群，下江群与丹洲群，均属毗邻区地台之第一个盖层。基底与盖层是高角度不整合界面，系武陵造山运动的记录。     

大义山地区硼矿地球化学特征及找矿方向

本文从赋硼地质体入手，研究了大义山地区硼矿床的化学组分，微量元素，稀土元素，包裹体碳，氧同位素的地球化学特征。阐述了硼矿床的物质来源和成矿物理化学条件及元素的迁移富集规律，并结合矿床地球化学异常特征，总结了成矿地球化学模式，指出了两个找矿靶区。     

湖南省锰矿资源形势分析与对策

本文概述了我省的锰资源现状，分布特点及其探明储量；并结合典型矿床实例，重点介绍了６个锰矿工业类型矿床特征；在此基础上，指出我国锰帮资源虽然丰富，但由于钢铁，化工工业的迅速发展，仍不能满足生产需要。因而提出了４个方面的对策，它们对加速我省锰矿资源的勘查和开发利用，具有现实意义。     

辽宁区域地震短波通信传播特性和频率选择探讨

辽宁区域地震短波通信网对电磁波在无线通信中的传播特性及频率选择等问题，没有进行深入的理论研究和探讨。笔者将通信工作的实践经验升至理论的高度，研究探讨辽宁区域地震短波通信传播特性和频率选择办法，达到在短波数据通信中，选择最佳频率，增加沟通率的目的     

A CASE STUDY ON POSSIBLE DEBRIS FLOW CAUSED BY WASTE SOLID IN JUNGAR COALFIELD AREA

Debrisflow,definedasakindofhighlycondensedtit!o-phaseflowofsolidandfluid,iscomposedofslurryandrocksofdifferentsizeswithageneraldensity'ofI.2to2.3t/m3.Theactivityliesbetweenfloodandlandslide.Itflowslikenormalfloodandsholvsturbulentstateaswithlesssolidcontentsandlowerviscosity,itisplasticviscousflowwithunstablegUstmovementwhellitisofhighsolidcontainsandhighviscosity.Debrisflowisformedunderthreebasicconditionsfprecipitousslopeoflandform,solidwasteoflargevolume,andenoughwatersupply.Theoccurrence,…     

LAND DEGRADATION AND ITS CONTROL STRATEGIES IN CHINA

Ｈｕｍａｎ-ｉｎｄｕｃｅｄｌａｎｄｄｅｇｒａｄａｔｉｏｎａｓａｃｅｎｔｒａｌｔｈｅｍｅｏｆｄｅｓｅｒｔｉｆｉｃａｔｉｏｎｉｎｔｈｅｗｏｒｌｄｒｅｆｅｒｓｔｏｄｅｃｌｉｎｅｏｒｌｏｓｓｏｆｂｉｏｌｏｇｉｃａｌｏｒｅｃｏｎｏｍｉｃｐｒｏｄｕｃｔｉｖｉｔｙｃａｕｓｅｄｂｙｉｒｒａｔｉｏｎａｌｈｕｍａｎａｃｔｉｖｉｔｉｅｓ.ＡｃｃｏｒｄｉｎｇｔｏａｓｓｅｓｓｍｅｎｔｏｆＵＮＥＰａｂｏｕｔ3.6ｂｉｌｌｉｏｎｈａｏｆｌａｎｄｉｎｏｖｅｒｏｎｅｈｕｎｄｒｅｄｃｏｕｎｔｒｉｅｓｈａｖｅｂｅｅｎａｆｆｅｃｔｅｄｂｙ…     

活断层分段及其地震危险性评价

本文论述了活断层分段中的一些基本概念和主要的边界标志。提出分段的基本原则是：以断裂的不连续性为依据，以地震危险性评价为目的，划分断层段。文中提出了９条分段依据和３９个具体标志。认为地震危险性评价应坚持两条原则：①由定性到定量；②循序渐进，逐步缩小范围和时段。文中提出了利用活断层资料确定潜在地震危险区、估算震级和预测发展时间的方法，其中的一些模型是作者近年来的最新研究成果。认为利用活断层分段进行地震危险性评价具有一定的科学性和实用性，是中长期地震预测的重要研究内容之一。     

Hierarchical Clustering Analysis of Focal Mechanism Solutions, Taking the Haicheng Earthquake Sequence as an Example

The currently used methods for analyzing a number of focal mechanism solutions are often ineffective for large samples.With the aid of the basic concept of hierarchical clustering methods for pattern recognition and in combination with the expression of focal mechanism solutions themselves,the sum of the angle between P-axes and the angle between T-axes of 2 solutions is defined as a distance,and a software for hierarchical clustering analysis by the shortest distance method and longest distance method is compiled.The number of types in the clustering results can be determined in accordance with different requirements.For focal mechanism solutions of the same type,the average position of each stress axis can be calculated by the method of vector composition and thereby the spatial orientation of the average focal mechanism solution can be determined.In order to test the feasibility and reliability of the software,hierarchical clustering analyses are made for the focal mechanism solutions of 24 earthquak     

Principles for Verification of Historic Earthquake Records

The principles are summarized in this paper for tackling problems related with the verification of historic earthquake records so as to enable proper utilization of the rich historic data of China.Case studies furnished in this paper show that those principles could be effectively utilized to solve the puzzling problems encountered in studying the historic earthquake data.The principles listed in this paper might also be used to tackle problems associated with the historic records of other branches of science.