新疆萨尔托海化探异常特征及找矿前景

本文通过对新疆萨尔托海进行1:1万的化探详查,结合该区域的地质特征,分析了Au,Ag,Cu,Pb,Zn,W,Sn,Bi,Mo,As,Sb,Hg等12种元素。对元素的富集与离散特征、元素组合特征、单元素异常特征、综合异常特征进行了研究,并在部分异常区附近已经先后发现多处金矿(化)点。通过对萨尔托海区域化探异常特征与地质概况分析,指示萨尔托海具有较大的找金矿潜力。     

陕西箱子寨-铜钱峡地区志留系金矿土壤地球化学特征及找矿标志

箱子寨-铜钱峡金矿区位于扬子地台北缘巴山弧形断裂东侧,近年来西北有色地质勘查局在该区开展了志留系金矿整装勘查工作,在该金矿带上通过1:1万土壤地球化学测量工作发现了三岔沟、奋家沟、箱子寨、铜钱峡等多处金矿点。文章以该区成矿地质特征为主题,指出了成矿地质、土壤地球化学特征。通过对化探异常特征的研究,得出Au与As元素有一定的共生组合与成生联系。并根据化探异常与成矿的关系,建立了该地区金矿的找矿标志。对进一步利用化探数据指导找矿,以及提高金矿普查效果有一定的积极意义。     

新疆哈密市玉峰金矿地球化学特征及含矿性分析

为了能够揭示新疆哈密市玉峰金矿的矿床地质特征以及该矿区内所包含的矿物成分,对该地区的地球化学特征进行研究并分析其含矿性特征。首先需要判断新疆哈密市玉峰金矿矿床地球化学特征,包括金矿微量元素平均值统计结果与异常元素地球化学特征,分析该矿区内具备富集条件的元素。然后对新疆哈密市玉峰金矿含矿性进行分析,得到各区域内达到找矿标准的矿物所在地,对各区域的地球化学特征与其含矿性做出解释。     

陕西省宁强县庙坝乡朱家坝金矿地球化学特征和找矿前景分析

朱家坝金矿位于“勉略阳三角地区”西南部,属勉县茶店子一宁强青木川金银铅锌铜硫远景区。文章在讨论成矿地质背景基础上,论述了工作区地质特征,对矿体地质特征和工作区地球化学特征进行了分析和研究。金矿赋矿岩性为石英脉,韧性剪切带及次级断裂严格控制金矿体的展布形态。圈定的化探综合异常规模较大,异常强度较高,异常元素套合较好。工作区整体成矿条件有利,具有较好的找矿前景。     

土壤地球化学方法在黄野坪金矿区普查中的应用和找矿效果

通过在崤山金矿田黄野坪金矿区开展1∶1万土壤地球化学测量,圈定了Au、As、Sb等元素异常。在综合分析各异常的元素组合特征、分带性、浓度情况的基础上,对各异常进行了分类和分级,结合异常所处的空间位置,圈定和优选了找矿靶区。针对重点靶区,利用地质测量、工程揭露、深部钻探工程进行了查证,发现了金矿体,取得了较好的找矿效果,并对邻区的金矿找矿工作具有重要的指示意义。     

江西金山金矿田朱林西金矿床矿体原生晕特征

朱林西金矿床位于金山金矿田的中北部,是与韧-脆性剪切带有关的石英脉型、蚀变岩型金矿床。在综合研究和利用矿区以往地质地球化学资料基础上,选取矿区40号勘探线为典型地质剖面,对该剖面坑探工程控制的Ⅰ号金矿带进行系统采样和数据分析与统计计算。利用相关分析、聚类分析、因子分析方法,确定了金矿床的原生晕组合特征。通过绘制和分析原生晕元素轴向异常分布图和叠加图、地球化学参数计算图,初步归纳了矿床构造叠加晕总体特征,并分析了矿体原生晕特征的地质意义以及对深部盲矿体预测的应用。研究认为:As与Au关系密切,As、Sb和Hg为金矿体的前缘指示元素组合;Pb、Zn、Cu分布于矿体周围,为矿体的近矿晕指示元素组合;Mo、Mn和Co元素为矿体的尾晕元素组合;尾晕的反带异常、前缘晕与尾晕叠加等特征对深部盲矿体预测有重要指示作用。     

青海滩北雪峰地区土壤地球化学异常特征及找矿前景

滩北雪峰位于祁漫塔格地区西段,是利用化探手段新发现的构造蚀变岩型金矿,探讨该金矿的化探异常特征及其找矿前景,对在祁漫塔格地区寻找金矿具有重要指导意义。在滩北雪峰地区开展了1/1万土壤地球化学测量,结果显示Au为富集元素,变异系数较大,R型聚类分析显示Au与Bi呈显著正相关,表明该区金成矿可能与中低温热液活动有关。进一步分析元素地球化学特征,并结合矿区地质背景,圈定出13个土壤综合异常,选择AP7、AP9异常区开展了异常查证工作,发现1条金矿化蚀变带,带内圈定出3条金矿体,地表亦发现多处金矿化线索。结合成矿地质条件,初步建立了地质、地球化学和构造等方面的找矿标志,探讨了矿床成因,指出今后找矿方向。土壤地球化学研究表明:该区具有良好的找矿前景,是寻找构造蚀变岩型金矿的有利地区。     

长地儿金矿矿床地质特征及找矿远景分析

根据矿床所处地质背景、地质构造、区域地球化学特征以及矿床地质特征,对长地儿金矿成矿条件、成矿规律进行分析研究,建立了该金矿的区域地球化学找矿模型,认为峨眉山玄武岩、韧性剪切带与该区金矿形成关系密切,采用地质物化探综合手段,对该区已发现的化探异常进行查证,有望实现新的找矿突破。     

夹皮沟金矿田北沟金矿床原生晕特征及深部成矿预测

北沟金矿床位于夹皮沟金矿田北部,夹皮沟北西向构造蚀变带中段。北沟金矿区内矿体赋存于夹皮沟群片麻岩中,矿石以石英脉型和石英网脉型为主。通过对矿床地质特征、矿石特征及原生晕地球化学特征的研究,认为金矿化与夹皮沟群片麻岩、钾质花岗岩体、中生代中酸性脉岩关系密切;北西向构造蚀变带是北沟金矿床主要控矿构造。原生晕分析结果表明,北沟金矿床矿体的元素垂向分带序列为As-Hg-Sb-Ag-Pb-Cu-Te-Au-S-Bi-Zn-Ni-Co-Mo-W-Mn。通过对北沟金矿床元素垂向分带模式的分析,结合前缘晕元素Hg异常浓聚中心到矿体头部距离是240 m,预测在深部1 050 m处存在矿体。通过与已有钻孔信息进行对比,该处已发现矿体,与本次预测结果一致。     

青海玉树旁安金矿区地球化学异常特征及找矿潜力分析

旁安金矿区位于北巴颜喀拉造山带大场金矿田东北缘。1∶20万水系沉积物测量结果显示,Au、As、Sb元素与邻区相比具有明显高背景特征;1∶5万水系沉积物测量显示,Au元素异常规模大、强度高,并伴生Mo、Sn、Hg、W等元素异常。利用1∶1万土壤地球化学测量缩小找矿靶区,圈出以Au元素为主的土壤综合异常15处(AP1—15),异常浓集中心突出,梯度变化大,套合好;综合异常受北西向断裂和早—中三叠世昌马河组双重控制。通过对土壤综合异常AP2、AP6查证,探获4条矿体,金资源量2.08 t,金平均品位2.76×10^-6,该矿床达到小型规模,证实综合异常为矿致异常。通过对区域成矿地质条件的分析,并与邻近大场金矿区进行对比,结合土壤地球化学测量结果,认为旁安金矿区具有良好的找矿潜力。     

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.     

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.