区域化探方法试验探讨—以胶东半岛莱阳幅1∶20万水系沉积物测量为例

为了了解莱阳幅1∶20万水系沉积物测量采样方法,通过季节试验、粒度试验和异常持续长度试验对该区的采样方法进行研究,结果表明：该区采样粒级应以-60目为宜,采样季节对元素含量影响甚微,流长长度在1.8km以内都可以有效的发现区域异常。不过由于研究区异常持续长度试验只在一个矿区,对比元素较少,难以肯定流长长度的代表性,仅供参考。     

安徽庐江龙桥铁矿含矿地层的古地磁学研究

通过对安徽庐江龙桥铁矿ＺＫ１００４孔（深６１７ｍ）１３２个古地磁标本的研究，认为该矿区赋矿地层的时代应属晚侏罗世（１３６－１４７Ｍａ）；其上覆火山岩地层应旭属下白垩统；将龙门院组、砖桥组划归下白垩统较为合理。     

Meso-Cenozioc Tectonic Attribute of Southern China and Folding of the Nanhua (South Cathay) Orogenic Belt

The Meso-Cenozoic tectonic attribute of southern China is a continental tridirectional orogenic belt formed by subsynchronous interaction among the Tethys, Northwest Pacific and Kunlun-Qinling tectonic domains. It was created by superimposition of repeated orogenies since the Late Permian. The Indosinian folds therein are gentle and localized.     

1996年3月19日新疆阿图什6.9级地震烈度与发震构造

１９９６年３月１９日新疆阿图什、伽师县东北部发生６．９级主震－余震型地震，震中烈度达ＩＸ度。极震区内边坡裂缝、山体塌陷、山石崩塌。伽师县卧里托乎拉克乡、古尔鲁克乡、西克尔镇和阿图什市的格大良乡、农三师红旗农场等地许多房屋倒塌，大多数房屋出现不同程度的破坏。水坝和公路出现塌陷、裂缝。在地下水位较高、土质松散的地区出现大面积喷砂冒水现象。地震造成直接经济损失３．８７亿元。此次地震是托特供拜孜－阿尔帕勒克断裂最新活动的表现。     

Measurements of ^222Rn and ^220Rn with a Large Size Collector of Radon Progeny

Radon concentrations in high background radiation areas in the south are higher than those of others in China, especially ^220Rn concentration is significantly high. Therefore, measurements of ^222Rn and ^220Rn concentrations should be carried out there. This paper introduces a large size collector of radon progeny and its applications. The collector is a sheet of polyvinyl chloride fiber with electrostatics of (-500 V)-(-700 V). Its size (60 mm in diameter) is larger than those of others (26 mm in diameter) that work with the same principle. The collector is more effective to adsorb radon progeny than most of others. The equipment of ZnS(Ag) Scintillation Counting System is available for large size collectors to detect radon progeny. Therefore, its sensitivity of measurement is higher than that of others. According to the different half lives of radon progeny, and based on both theory and experiments, a formula for discrimination and calculation of ^222Rn and ^220Rn concentrations is deduced. The ^222Rn and ^220Rn concentrations were surveyed with electrostatic collectors of radon progeny on the campus of commercial school and some other areas in Hainan, southern China. Neither ^222Rn nor ^220Rn concentration was found significantly high. However, several faults underground were delineated. The collector is also used to study radon transportation. Results indicate that radon changes regularly with date when it has transported for a certain distance. Velocities of radon migration in the four media are quite different. Radon migrates more quickly in vertical tube than in the horizontal tube.     

威海市温泉汤温泉形成模式

温泉汤温泉是威海地区一个非常重要的温泉,综合地球化学和地质调查方法,分析温泉汤温泉的形成模式。本文采集温泉汤温泉水样进行了水化学和氢氧稳定同位素测试,通过分析温泉水的水质类型、补给来源,估计水循环深度,结合地热地质条件进一步丰富了地热成因机制。水化学Piper分析图表明温泉水属于Na-Cl型温泉,水岩作用分析表明温泉水具有浅层水的特征,而氢氧稳定同位素值分布于中国东部大气降水线附近,推测温泉水主要受大气降水、地表水、地下水等浅层水的影响。根据δ~2H同位素高程效应,计算得到温泉的补给高程为225～265m之间,根据周边地形地貌特征,南部山区约为240m左右,确定南部山区是主要的补给源。综合分析认为,大气降水从温泉汤温泉南部山区汇聚到盆地中,大气降水、地表水、地下水等通过断裂破碎带在深部进行热交换形成温泉热水,然后运移到地表,出露成温泉汤温泉。通过成因模式分析,为温泉汤温泉的资源评价和开发利用提供科学依据,也为威海地区其他温泉的研究和开发利用提供参考。     

洞穴研究进展综述

洞穴学发展到现阶段,已成为一门综合性交叉学科。本文综述在洞穴分类、洞穴发育演化机理和模拟实验研究、洞穴探测与国际合作、洞穴资源及数据库建设、洞穴沉积物分类及成因研究、洞穴石笋的古环境记录研究、洞穴生物研究、洞穴景观旅游开发、洞穴环境系统观测与洞穴医疗试验研究、洞穴保护与管理等方面所取得的进展。     

桂北-桂东加里东期盆地构造沉降史分析

对造山带各地史阶段的沉积盆地进行构造沉降分析,进而探讨其地球动力学过程,是近年来盆地分析的前缘研究之一。本文采用回剥分析技术,分别编绘了桂北、桂东地区加里东期盆地沉降曲线,并进行了构造沉降史分析。结果表明,桂北、桂东加里东期盆地演化均经历了从拉张裂解到挤压闭合的完整过程。但与桂东大瑶山地区相比,桂北兴安地区在裂陷阶段的沉积速率和构造沉降速率明显偏低;热沉降阶段的持续时间偏长;裂陷阶段与前陆挠曲阶段的分界拐点偏晚;前陆挠曲阶段,由构造宁静期的缓慢沉降向构造活动期的快速沉降转化的分界拐点也偏晚。这些差别这一方面说明了两地区具有不同的构造背景,另一方面也反映了华夏板块由南东逐渐地向北西扬子板块靠拢,沉积盆地相应地向西北迁移的动力学过程。     

地电阻率（ρs）变化主轴方向计算与地震预报

本文给出地电阻率（ρｓ）变化主轴方向Ｘｐ、Ｙｐ的计算方法,并通过对四平地震台、台安中实测地电阻 变化主轴Ｘｐ、Ｙｐ方向计算,模拟现代区域构造应力场。