内蒙古锡林郭勒杂岩岩石学特征研究

锡林郭勒杂岩出露于华北地块北缘晚古生代褶皱带内,位于内蒙古东部锡林郭勒盟-西乌珠穆沁旗-巴林右旗一带,主要为细粒黑云母斜长片麻岩,斜长角闪片麻岩,磁铁石英岩,云母石英片岩,变质辉长辉绿岩,镁绿泥石透闪石岩,片麻状黑云母英云闪长岩。通过在野外研究,实测剖面以及岩石类型鉴别的基础之上,可将锡林郭勒杂岩划分为三套岩石组合:花岗岩类组合;基性-超基性岩组合;表壳岩组合。     

白马崖金矿床地质—地球化学特征及其成矿意义

白马崖金矿床处于康滇地轴北,是康定杂岩体内典型的石英脉—蚀变岩型金矿床。矿区出露古老的变质结晶杂岩基底,多呈刚性较强的块状岩石,岩性以斜长角闪岩、黄铁绢英岩、绢英片岩和构造片岩等为主。矿石矿物以石英为主,占90%以上,含少量绢云母、黄铁矿及其他硫化矿物。矿区断裂以近SN向脆—韧性剪切断裂为主,具多期次活动特点。通过矿床地球化学主量元素、稀土元素、硫同位素及流体包裹体的研究,白马崖金矿区围岩与蚀变岩在稀土元素配分曲线上均表现为缓右倾型;白马崖金矿床δ34S变化于-2.1‰-4.4‰之间,均值为1.6‰;含矿石英中流体包裹体以富含CO2为特征。白马崖金矿床断裂构造发育,深部岩浆流体带来成矿物质,并对围岩进行改造,富集成矿,对于进一步的研究和找矿工作具有一定的指导意义。     

辽西建平地区太古宙建平群小塔子沟组变质岩地质特征

辽西地区太古宙变质杂岩在建平一带分布最广泛，特征最明显，代表性最强，是一套片麻岩夹磁铁石英岩的变质岩系。经岩石学、地球化学研究表明，原来建立的建平群小塔子沟组变质岩，是由变质表壳岩和变质深成岩组成，以变质深成岩为主，变质表壳岩以包体形式漂浮与变质深成岩之中。变质表壳岩的斜长角闪岩、基性麻粒岩和超铁镁质岩为基性一超基性火山岩，磁铁石英岩成因与基性火山岩和基性火山沉积岩有亲缘关系。叶柏寿片麻岩和斜长片麻岩、二长片麻岩为侵入形成的闪长岩、英云闪长岩和二长花岗岩。     

甘肃省肃北县勒巴泉西金矿矿体特征浅析

:勘查区位于甘肃省肃北县马鬃山镇一带,属东天山-北山铜、镍、铅、锌、钨、钼、金、成矿带。勘查区内出露地层有奥陶纪窑硐努如岩片,志留纪公婆泉群等地层,主要出露岩性:千枚状板岩、绢云绿泥石英片岩、石英岩及安山岩。金矿主要产于奥陶纪窑洞努如岩片中,岩性主要为片理化的安山岩、石英岩、绿泥绢云石英片岩、绢云片岩、片麻岩等。金矿为韧性剪切带型,赋矿岩性为强蚀变碎裂绢云石英片岩、蚀变石英网脉,围岩主要有石英岩、硅质板岩等。金矿石以微、细粒金为主,多呈微细粒状被黄铁矿包裹,黄铁矿是金的主要载体矿物,矿体以似层状为主,矿石工业类型属少硫化物金矿石。矿体主要受韧性剪切型构造控制。     

韧性剪切带控制的“焦家式”金矿及其找矿方向

莱州北部的金矿主要受三山岛和焦家两大断裂控制,断裂内发育诸多的糜棱岩、SL构造岩,石英丝带（L线理）、旋转碎斑和S面理,宏观、微观特征都证实其属于脆—韧性剪切带。研究证明,韧性剪切作用发生在郭家岭岩浆结晶分异的脉岩侵入之后,其时间推测约在126~122 Ma之间。当被主成矿期含金热液充填交代后,糜棱岩、SL构造岩相应形成浸染状黄铁绢英岩化矿石和脉状黄铁绢英岩化矿石。韧性剪切作用的深度较大,推测这2条脆—韧性剪切带约在地下5 500 m的深度交会。沂沭断裂带东侧的次级构造——早白垩世形成的NE向脆—韧性剪切带与郭家岭花岗岩的复合部位,是形成世界级蚀变岩型金矿的最佳部位。     

江南造山带黄金洞金矿蚀变岩型金矿化形成机制研究

蚀变岩型矿石是热液型金矿床中重要的矿石类型,其形成与水岩反应密切相关。江南造山带黄金洞金矿中的蚀变岩型矿石多发育在褪色化蚀变带中,目前其形成机制尚不清楚。野外勘查、岩相学观察和TIMA分析表明,蚀变带中最主要的特征是广泛发育菱铁矿、绢云母和隐晶质石英。蚀变岩型矿石局部可见较多硫化物,与含金石英脉中的硫化物具有相似的化学成分,说明为同一期流体作用的产物。部分硫化物切穿碳酸盐矿物,说明褪色化蚀变形成于成矿前。TIMA和μ-XRF分析表明,蚀变带发生硅化和绢云母化,且Fe聚集成点状。因此,推测成矿前的水岩反应形成大量菱铁矿斑点,为成矿提供良好的化学圈闭。成矿期含金流体与菱铁矿发生化学反应,通过硫化作用促进金的沉淀,为黄金洞金矿蚀变岩型矿石的成矿机制。     

河南省光山县徐坪金矿地质特征及找矿标志

矿区位于桐柏-大别山造山带中段,出露地层包括中新元古界浒湾岩组、震旦系—奥陶系下统肖家庙岩组、泥盆系南湾组三段、白垩系下统陈棚组和第四系,矿区圈定金矿化体24条,矿石类型为石英脉型及含金破碎蚀变岩型,本文通过对光山县徐坪金矿地质特征及矿(化)体特征分析,提出了区内金矿找矿标志。     

山东省蓬莱市强沟金矿地质特征及成因研究

研究区位于郯庐大断裂东侧,属胶东半岛招平—莱州金成矿带,区内出露地层主要为胶东岩群,是区域主要的金矿源层。区内花岗闪长岩体发育,其金含量是标准花岗闪长岩体的7倍,岩体形成时,含大量金质的期后热液是胶东金矿床形成的主要物质来源,成矿地质条件较好。根据矿石的结构构造、矿物共生组合及其相互穿插关系判断,研究成矿作用可分为石英-粗粒黄铁矿阶段、金-石英-细粒黄铁矿阶段、绢云母-方解石阶段,前两个阶段为金主要富集阶段。强沟金矿床围岩蚀变较弱,矿石类型以石英脉型和蚀变岩型为主,矿床为岩浆期后中温热液充填交代型。花岗闪长岩体与胶东岩群接触带、NNE向断裂带中金石英脉是研究区内重要的找矿标志。     

老挝北部乌多姆赛省金矿床成矿地质条件分析

老挝北部乌多姆赛省发现金矿床为受构造控制的中低温热液脉型金矿床,西北部主要出露晚古生代石炭纪-二叠纪地层(C-P1),南部小范围出露中生代侏罗纪(J2)地层。矿石类型分为风化残积富集型、蚀变岩型、含金石英脉型金矿石。     

内蒙古乌拉特中旗道德哈日陶勒盖石墨矿地质特征及成因分析

内蒙古乌拉特中旗道德哈日陶勒盖石墨矿产于古元古界宝音图岩群一岩组(Pt1B.1)石英片岩、二云石英片岩、变粒岩及大理岩中。矿体受古元古界宝音图岩群一岩组控制,呈层状、透镜状产出。通过对该矿床的矿体特征、矿石特征、围岩及夹石等研究分析表明,道德哈日陶勒盖石墨矿为古元古界宝音图岩群一岩组砂、泥质岩经变质作用形成片岩过程中,碳质成分局部富集,经变质形成晶质石墨矿床,其矿床成因类型属于沉积变质型石墨矿。     

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。     

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。     

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。     

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.     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.