MT法中利用阻抗相位资料对畸变视电阻率曲线的校正

从理论上论证了在一定条件下大地电磁响应中的相位资料将不受随机电磁噪声的影响，介绍了由相位资料递推计算视电阻率的方法，通过与远参考资料的比较，证明利用阻抗相位资料可分段恢复校正畸变的实测视电阻率数据。     

Deformation Mechanism and Stability of a Rocky Slope

A high slope is located on the side of the spillway at a hydropower station in Southwest China, which has some weak inter-layers inclining outwards. Parts of the slope show heavy weathering and unloading. There appeared deformation and tensile crack either on the surface or on the afteredge of the slope during excavation, and under a platform （elev. 488 m）, two levels of slopes collapsed on the downriver side. Based on the investigation in situ and the analysis of the geological structure, the conceptual model of deformation and failure mechanism was erected for this slope. Furthermore, the deformation characteristics were studied with FLAC^3D numerical simulation. Comprehensive analysis shows that the whole deformation of the slope is unloading rebound in certain depth scope and the whole body does not slide along any weak interlayer. In addition, two parts with prominent local deformation in the shallow layer of the slope show the models of ＂creep sfiding-tensile cracking＂ and ＂slidlng-tensile cracking＂, respectively. Based on the above analysis, the corresponding project of support and reinforcement is proposed to make the slope more stable.     

湘西震旦系留茶坡组炭质宏化石初步研究

初步研究表明,留茶坡组中部黑色页岩中化石呈炭质压膜状保存,主要包括长绳状或带状宏观藻：Chenlidenella spiralis gen.et sp.nov.,Longifuniculum dissutum Steiner,Erdtmann and Chen,1992,Longitaenina triphyllus gen.et sp.nov.,L.rhodina gen,et sp.nov.,L.lanceolatus gen.et sp.nov.;直立不分枝的管状 宏观藻Longfengshania elongata Duan et Du,1985,L.elliptic-ulum sp.nov,Paralongfengshania oblong sp.nov.Miaohenella hunanensis(Steiner,Erdtmann and Chen,1992),M.rhomba Ding,1996,M.taenina sp.nov.,Cystoculum catenuatus gen.et sp.nov.;末端存在二歧式分的丝状宏观藻：Sectoralga bibarb atus sp.nov.,S,typica Hu,1996,S.capillaceus sp.nov.,S.umbellulata Hu,1996和水母状化石Taoyuania ovatoides gen.et sp.nov.,Liaonanella giganta sp.nov.,Wulingshania canopse gen.et sp.nov.及蠕虫状化石Wenshanwania simplex gen.et sp.nov.等。从地层对比上看,上述化石可能与伊迪卡拉动物群为同一时期的产物。晚震旦世晚期留茶坡组中类水母化石的出现是我国晚震旦世生物演化史上一次重要事件,以类水母等软躯体动物和高分异度的宏观藻类共同繁盛为特色的生物群与国内外同期地层中的已知生物群面貌不同,显示出一种新的伊迪卡拉庭园,为此,本文将棋其合名为武陵山生物群。     

The Yenshanian—type Twin Granite Belts in Intracontinental Compression—subduction Environments in the Northern Part of East Qinlin Area

Calc-alkaline granites (excluding A-and M-type) could be divided into two petrogenic series,I,e,the syntexis series and the transformation series according to their genetic mechanisms.In the light of this classification we found that granites of these two series often aligne in paired zones parallel to contemporaneous B-type or intracontinental compression-subduction zones within ascended slabs,re-sulting in a regular zonal pattern together with subduction zones.Thus,they are defined as twin granite belts.According to the spatial relations between the granite belts and the subduction zones,the twin granite belts could be classified as A, AB and B-type .The zonation of granites of the two series in the northern part of the East Qinlin area could be cited as a typical example of A-type twin granite belts related to the Yenshanian intracontinenta compression-subduction movement in the area.In this paper the tectonic settings and petrogenic features of the twin granites belts in East Qinlin are systematically described,and a tectonic model for granitic magma genesis in intracontinental compression-subduction environments has been proposed.In this model the forma-tion of A-type twin granite belts is closely connected with tectonic movements in terms of the prince-ple,rule and dynamics of material differentiation in the lithosphere.     

The Material Sourece of a New Type of Copper Deposits—Evidence from Stable Isotopes

The new type of copper deposits concerned with in this paper are vein copper deposits found in the Lanping-Simao Rift Basin, Yunnan,China. As is indicated by H,O,C,S,Pb and Sr isotopes, water and mineralizers in the ore-forming fluids were derived from heated meteoric water and mantle, respectively.The metallic elements(Cu,Ag,Pb,Zn,As,Sb,Fe,REE,etc.)are characterized by a mixed source from the crust and the mantle.     

云南羊拉铜矿三维地质建模及储量计算

以云南羊拉铜矿的断层、地层、岩体、矿体为研究对象,在分析研究建模技术方案的基础上,依据收集到的钻孔柱状图、勘探线剖面图、中段地质图和地形地质图,结合野外踏勘与认识,利用Micromine软件建立了研究区的地形、地层、断层以及矿体的三维实体模型,直观展示了区内地表、断层、地层、岩体以及矿体的空间展布以及相互的空间位置关系。运用克里格法对里农矿段的铜矿体进行品位估值,获得了矿体的储量。     

DT—1016型阴离子交换树脂分离富集金铂钯

研究了DT－1016型阴离子交换树脂对超痕量Au,Pt,Pd的吸附性能及条件。在0.025mol/L HCl介质中，流出速度为0.5-1.0mL/min时，Au,Pt和Pd的富集效果最佳，吸附率分别为99.72％，99.06％和97.95％，共存离子无显著性影响。用等离子体质谱测定标准物质中Au，Pt和Pd，其结果与标准值基本相符。检出限Au为0.27μg/L，Pt为0.40μg/L，Pd为0.19μg／L。对GBW 07294铂族元素国家标准物质进行精密度试验，RSD（n=8）Au为19．2％，Pt为28.1％，Pd为15.6％。     

Age and Thermal History of the East Ore Section,Bayan,Obo Deposit—A Fission Track Study

Considerable attention has been paid in recent years to the study of geothermal history by using spontaneous fission tracks of 238U recorded in minerals.Apatite and zircon were used for fission track study in this paper because apatitie has been widely used as a natural geothermometer(Wang Shicheng et al., 1994) to reveal the thermal evolution of sedimentary rocks based on its low annealing temperature of fission tracks and zircon is characterized by a closing temperature above 700℃,The samples were collected from ferruginous,siliceous slate wall rock at the upper levels of the orebody and Nb-REE-Fe ores from deep tunnels.The age and thermal evolution of the orebody were discussed in terms of fission track characters and their length variations observed in the coexisting apatite and zircon in the same specimen.     

黑龙江省老柞山金矿综合找矿标志探讨

本文对黑龙江省老柞山金矿区进行了水化学、生物（植物）化学及重砂矿物特征研究。结果表明：矿区河水含金钽高于一般河水中的含金钽数千倍，Cl^-浓度低于一般河水。通过系统测量植物体内的含金性及查明其它一些有关地球化学特征，可发现金矿化异常。重砂矿物对比确定砂金补给源于片麻状混合岩、闪长玢岩。     

γ射线透射法测煤灰分的影响因素及校正方法研究

介绍了低能γ射线透射法测量煤灰分分析系统，并且说尽论述了分析系统在测量过程中对测量结果产生主要影响的粒度、温度、成分、水分等因素，针对各种影响因素产生机理，通过大量的粒度、温度、成分、水分等实验，给出动态追峰法，自动补偿法等实用校正方法。