A New Variety of Mineral—Argentian Mercurian Gold

Argentian mercurian gold,golden-yellow in colour,is a variety of native gold containing Ag and Hg,coccurring as hexagonal and tetragonal crystals in hairy,milk-droplet or irregular forms.Its microhardness Hv=91kg/mm^2,equivalent to 3.04on Mons‘scale,and the reflectance is 70.35%(589nm).Chemical analysis gave:Au 56.05-67.33,Ag18.29-31.06 and Hg 10-14.82%,as well as minor Cu.In a few samples Bi or Fe was also detected.The simplified formula is (Au0.52Ag0.36Hg0.09Cu0.02)0.99.X-ray analysis suggests the mineral is of isometric system,with space group=Oh^5-Fm3m,a0=0.40803nm,V=0.06739nm^3,and Z=4.Argentian mercurian gold occurs in a Ag-multimetal deposit at Xiacun,Baiyu County,Sichuan Province,As observed in the mining district,the mineral is distributed along the fissures of the main metallic minerals pyrite,tetrahedrite,chalcopyrite,arsenopyrite,galena,sphalerite,etc.,or in the sulfide veinlets developed in the.fissures of these minerals.Also found in the mineral deposit are native gold,argentite,sulvanite,bournonite,boulangrite,etc.     

虎皮鹦鹉夜叫声量异常与地震关系的分析

本文根据江苏省东台市Ｊｉａｎｇ港农场综合地震测报点微观观测虎皮鹦鹉的实验资料，详细介绍了１９８５年以来记录到的两次地震前鹦鹉异常反应。并对观测条件和方法、资料的可靠性、异常指标的确定，地震前兆异常与非震异常特征及其鉴别方法等分别作了介绍和讨论，还对动物的微观观测可能成为监视地震的一种有希望的短临前兆手段，进行了估评。     

大同铁路分局地裂缝带的三维构造特征及其成因分析

通过实地考察、槽探和浅层地震探测等手段以及对地质构造和地下水超采环境的分析，详细地研究了大同铁路分局地裂缝带的三维构造特征，指出现今处于发展中的地裂缝带是由东向西扩展的，扩展速率为２６０～５２０ｍ／ａ，地裂缝带两侧的差异升降运动速率达２２．１～２４．４ｍｍ／ａ，主地裂缝带的水平拉张速率约１．１１～１１．６ｍｍ／ａ，垂直错动速率０．２～８．５７ｍｍ／ａ，左旋错动速率１．８７～３．５７ｍｍ／ａ。地裂缝带的活动方式为无震蠕滑型，扩展中的地裂缝是一种无震的地质灾害     

苏北平原井下摆观测效果的讨论

文章以江苏省大丰台、盐城台、淮阴台、海安台，射阳台井下摆观测为例。比较它们的观测结果，分析认为井下摆的观测效果不仅与地面复盖层的厚度有关，而且与井下摆周围的环境干扰，观测用井的质量有关。为了提高井下摆观测效果，应尽量减少环境干扰，并注意井的垂直度和固井，文章还指出，沿海地区井下摆受海浪干扰相当显著的。     

气象因子对近地面臭氧污染影响的研究

本文通过对１９９３年春季和春夏之交的O3浓度逐日变化、日变化和气象因子关系的分析，提出了影响O3浓度的主导气象因子和不同情况下形成高浓度O3的主要因子，提出了大风速对逐日变化中O3浓度特高及浓度日变化峰值的重要作用，并指出高温、低湿、小风并不是在所有情况都是促成高浓度O3的因子。另外，雾也可以成为近地面O3浓度增值的因素，主要原因是雾内湍流发展将高浓度O3大量输向下方。     

磁记录材料的防霉

本文分析了磁记录材料长霉的原因和危害，介绍了防霉的试验过程以及防霉剂的应用效果。     

对建立遥感估产模式的几点初步认识

本文从分析遥感光谱参数的生物学意义着手，论证了正确建立遥感估产模型的可能途径。对几种有代表性的遥感估产模型作了分析，作者认为把可见光、近红外波段的遥感信息与热红外信息有机结合是解决遥感估产模型的最佳方案。对ＮＯＡＡ－ＡＶＨＲＲ的第１通道与第２通道光谱数值进行非朗伯体特性的纠正是必要的。遥感估产模型不仅可以使估产的空间尺度大大缩小而且参数数目亦可大大减小，更有利于实际运行。     

四川富顺─南溪地区地貌特征与经济开发的1∶10万TM图像判读

本文利用不同地物在同一波段或相同地物在不同波段具有不同色调的变化规律，来目视判读７幅ｌ∶ｌ０万的ＴＭ黑白和彩色合成图像。通过细致地分析、对比，在富顺─南溪地区判读不同泥沙含量、不同深浅的水体，了解河床中深槽、浅滩地貌，准确勾绘所有大于像元的水体涯线，确定沟谷的宽度和相对深度，查明沟谷成因，划分漫滩和河谷阶地，圈定丘陵和山地的，分布，研究它们的形态和成因，为区域开发奠定科学的基础。     

Structure and evolution of a tropopause fold during GALE IOP-1: An eta model study

Summary A fine-mesh regional model simulation of upper-level cyclogenesis is carried out to examine the structure and evolution of the accompanying tropopause fold and its relationship to the surface and upper-level cyclones. The initial state for the simulation, conducted using the 80-km, 16-level version of the National Meteorological Center Eta model, uses the Level III-b gridded dataset for 1200 UTC, 18 January 1986, during the First Intensive Observing Period (IOP-1) of the Genesis of Atlantic Lows Experiment (GALE) project.Results are presented from a 48 hour integration of the model. The emphasis is on the examination of the synoptic scale evolution and structure of the upper-level cyclone and tropopause fold, both of which were successfully simulated in the model. The potential vorticity structure associated with a propagating jet-streak displayed distinctive structure, with its tilt reversing as the jet-streak moved around the base of an amplifying upper-level trough. In addition, the model simulates the intrusion of dry, stratospheric air containing high potential vorticity anomalies into the lower troposphere as well as subsidence warming when the folding of the tropopause occurs. the model also predicts upper-level frontogenesis as a result of a thermally indirect secondary circulation in the exit region of the jet-streak. The success of the model simulation is most likely the result of comprehensive physics and the fine grid resolution employed and, more importantly, the excellent distribution of subsynoptic scale initial data during the GALE project.With 16 Figures