电吸附化探新方法在麻湾金矿区寻找深部矿体的研究

介绍了电吸附找矿方法的异常形成原理及其应用现状,将电吸附找矿方法应用于麻湾金矿区的电吸附异常研究,在工作区内获得了多个异常,异常高叠合度主要集中在测区的中南部,各元素吻合很好。为了验证异常,在工作区布设了3个钻孔,均见到明显的金矿体,最深处＞1 000 m。异常结果与钻探结果的对比分析表明,电吸附找矿法的异常能反映出深部隐伏矿体,而常规化探方法只能反映出地表出露的矿体,表明了电吸附方法寻找隐伏矿的效果优于常规化探方法。     

新疆青河顿巴斯套金矿区异常信息提取的方法研究

异常提取是地球化学勘查中的重要环节,对圈定成矿有利地段,指导找矿非常重要。以新疆青河顿巴斯套金矿区1∶1万土壤地球化学数据为研究对象,分别用传统方法、含量-面积分形方法和滑动平均法对Au、Ag、As、Sb、Cu、Pb、Zn 7种元素进行了异常圈定,结合地质资料对比发现:传统的方法圈出的异常范围较小,只在主矿体上出现异常;含量-面积法圈出的异常范围大,更能体现出地球化学的"弱小"异常;滑动平均法与区内已知的矿(化)体吻合最好,异常分布合理,亦可突出"弱小"异常。滑动平均法在矿区中北地段圈出的高强度异常,浓度分带明显,野外调查发现异常位于浅变质粉砂岩中,褐铁矿化比较发育,显示较好的找矿信息。     

物化探工作在崇义东峰矿区的应用及找矿效果

崇义东峰钨矿位于南岭东部钨锡多金属成矿带崇义—大余—上犹矿集区内,北邻淘锡坑钨矿。结合近年在矿区开展的以钨为主的矿产远景调查评价工作,通过化探工作圈定出异常区11处,应用物探音频大地电磁测深(AMT)工作推测矿区隐伏岩体形态,再对最优异常区进行异常查证,发现了矿化标志带,再投入槽探揭露、深部钻孔验证,找到了隐伏的钨多金属矿带。详细阐述了在东峰矿区寻找钨矿的过程及找矿效果,实践证明物化先行、地表查证和钻探验证相结合的方法,有较好的找矿效果。     

于都-赣县矿集区“地下室”钨矿化地质特征及找矿标志

在"五层楼+地下室"找矿模型指导下,近年在于都-赣县矿集区石英脉型钨矿床深部新发现一处隐伏岩体型黑钨矿床。通过对勘查矿区成矿地质条件和钨矿化特征的研究,认为成矿岩体是富钠长石锂云母(白云母)花岗岩,含泥质成分高的围岩构成良好封闭条件,岩体顶峰凹凸转折部位是矿化富集有利部位。发育隐伏蚀变花岗岩矿区往往有低缓磁异常和化探组合异常,地表岩层露头具不同程度的角岩化、云英岩化,发育"五层楼"矿化标志带。     

阿尔斯楞地区找矿前景分析

对阿尔斯楞地区从地质特征、矿源层、地球化学异常、地质查证成果分析,认为该区地表及浅部为金、银、铅锌矿（化）体,而深部可能有隐伏的大型斑岩铜钼矿。     

青海省卓亥乔克地区综合异常特征及找矿方向

卓亥乔克岩体侵入志留纪巴龙贡噶尔组地层,呈现"环形"磁异常。脉岩多沿北侧F5断裂带走向发育,地表见黄铁矿化、孔雀石化及褐铁矿化带,与1:5万水系沉积物测量AS3乙3综合异常、1:1万激电中梯低阻高极化异常吻合。初步认为"环形"磁异常主要由角岩引起,不排除深部磁铁矿层可能;化探异常、激电异常及地表矿化现象表明岩体北部有隐伏硫化物富集,有进一步找Au、Cu、Fe潜力。     

可控源音频大地电磁测深法在甘肃寨上金矿区的找矿应用研究

寨上金矿区地表覆盖层较厚,蕴藏有较多的隐伏含金破碎带。野外地质工作发现矿区内多数含金破碎带与围岩界限不清,南北矿带金矿体的围岩类型不同,致使电阻率差别较大。因此,在南北矿带两端和深部选择合适的物探方法寻找含金破碎带显得十分必要。根据矿区实际找矿情况,在南北矿带开展可控源音频大地电磁测深工作,研究该方法找矿的有效性。结果表明:南矿带电阻率异常与含金破碎带吻合较好,根据高低阻异常梯度带进行找矿的效果较明显;北矿带岩(矿)石电阻率异常差别较小,找矿效果较差,特别是北矿带西端岩(矿)石电阻率普遍较低,采用该方法对找矿毫无指导意义。此次工作成果可为下一步布置可控源音频大地电磁测深工作提供一定的参考。     

双频激电法在半尺沟多金属矿勘探中的应用研究

本次研究区位于甘肃省古浪县裴家营乡半尺沟及五龙沟一带,属于祁连山地中山区,水系极不发育,典型的干旱、半干旱气候。综合使用激电中梯和激电测深两种物探方法进行金属硫化矿的勘探。综合分析双频激电中梯平面、剖面异常特征及电测深断面特征,并结合地表地质特征,最后圈定了1个激电Fs(%)异常和3个局部异常。实践证明:双频激电工作,在此研究区寻找隐伏金属硫化物矿(化)体效果显著。值得今后借鉴使用。     

地质异常的奇异性度量与隐伏源致矿异常识别

以个旧锡多金属矿床为例,研究了致矿地质异常的非线性特征.从异常地质事件和成矿作用的奇异性出发,定量分析了地质异常的奇异性、不连续性、非平稳性、混沌性、白相似性、临界性等非线性特征.在此基础上,详细介绍了局部奇异性分析原理和方法,论述了奇异性指数对隐伏源异常的识别能力.结果表明,奇异性分析方法在个旧地区水系沉积物地球化学数据处理和隐伏源地球化学异常识别和圈定应用中是有效的.分析结果一定程度上消除了隐伏源深度的影响,所圈定的局部地球化学异常不仅在个旧东区较好地时应了已发现的大型锡矿床的分布,而且在其他低缓地球化学异常区也圈定了多处局部异常,为进一步开展锡矿勘查提供了重要靶区.奇异性理论和方法有望为深部矿产预测、隐伏矿预测、覆盖区矿产预测等特殊环境开展矿产预测提供了新的实用件理论和方法技术.     

地球物理方法在山东平里店金矿区找矿中的应用研究

平里店金矿床位于山东胶西北矿集区,属于焦家金矿田成矿构造系统范围,区内已发现玲珑、北截、灵山沟、望儿山等一系列金矿床,成矿地质条件优越。平里店矿区第四系覆盖较厚,且为隐伏矿床,与次级隐伏构造系统有着密切的成因联系。本文借助地球物理找矿方法,共圈出5处激电异常区,结果显示有3处异常为金工业矿体引起,1处为金矿化体引起,物探找矿显示良好。     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.