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671篇 您的检索式:作者名="Rahn"
    题名 作者 年代 出处 被引量
1Diagenesis and Metamorphism of Triassic Flysch Along Profile Zoige-Lushan,Northwest Sichuan,China显示文摘We used iilite and chlorite crystallinities,index minerals,mineral assemblages,polytype and domain size of white mica,electron microprobe analysis(EMPA),b_0 geobarometer and chlorite geothermometer to quantify the diagenetic and metamorphic overprint on the Triassic flysch formations in the Songpan-Garzêorogen along profile Zoigê-Lushan,northwest Sichuan.Two anchizones,two epizones,one diagenetic zone and a transition belt in-between them are defined on the basis of the obtained data.Illite crystallinity correlates strongly with the best mean domain size of mica and moderately with chlorite crystallinity.2M_1 white mica polytype are observed within the epizone whilst 2M_1 and 1M polytypes occur in the anchizone and diagenetic zone.Epizonal metamorphism reached maximum temperatures of 370℃±21℃at low-to intermediate pressure conditions.Clay minerals underwent Ostwald ripening during metamorphism.Rocks from both sides of the Longmenshan fault reveal contrasting degrees of metamorphic overprint:on the northwest side of the Longmenshan fault,epimetamorphic conditions contrast with diagenetic rocks on the southeast side.WANG Hejing M. RAHN TAO Xiaofeng ZHENG Nan XU Tingjing 2008Acta Geologica Sinica(English Edition)2008,82,4:7
2伊利石结晶度Kbler,Weaver和Weber指数关系式常数的确定与应用显示文摘根据衍射峰具有的不同分布特点推导出了14个伊利石结晶度Kbler指数,Weaver指数和Weber指数关系式中常数项C1-C14的数值,提出了PearsonVII分布中形态参数μ与C5,C6,C11,C12的4个定量方程。由此,14个伊利石结晶度指数关系式可直接用于实际计算。根据阿尔卑斯复理石伊利石形态特征Sc=0.731,由这些关系式进行近变质带上下界线的转换得出与Kbler指数0.42~0.25。△2θ界线对应的Weaver指数和Weber指数的界线值分别为5.8~17.6和300~179。讨论了在自然干燥状态下直接进行伊蒙混层鉴定的基本原理。王河锦 陶晓风 Rahn Meinert 2007高校地质学报2007,13,3:7
3蛇绿岩套中超基性岩体的岩石组合:蛇纹岩、异剥钙榴岩和蛇绿碳酸岩——以西阿尔卑斯Zermatt-Saas蛇绿岩为例显示文摘蛇纹岩、异剥钙榴岩和蛇绿碳酸岩是蛇绿岩套中超基性单元特有的3类岩石组合,该套岩石组合的形成过程复杂,经历了从地幔岩浆结晶分异、洋脊变质作用改造和俯冲-仰冲构造过程,记录了从地幔岩浆侵位到造山带形成、演化的全程信息。蛇纹岩由方辉橄榄岩、二辉橄榄岩和纯橄岩通过水化和氧化过程而形成;异剥钙榴岩由含水石榴石、符山石、绿帘石族矿物、透辉石和绿泥石等含水和含钙的硅酸盐矿物组成,是由基性岩经历钙交代和水化作用而形成;蛇绿碳酸岩则由高度破碎变形的蛇纹岩角砾和碳酸岩基质(方解石、白云石或菱镁矿)共同组成,碳酸钙主要来自海水参与蛇纹岩化过程产生的富钙热液。阿尔卑斯西部的Zermatt-Saas蛇绿岩体中这3种岩石的组合研究表明:蛇纹岩化过程发生在大洋变质时期,超基性岩体在海水的作用下形成蛇纹岩。蛇纹岩化过程中释放出主要来自斜方辉石和单斜辉石的钙,与水共同作用交代超基性岩体中的基性岩脉,从而形成异剥钙榴岩。蛇绿碳酸岩形成于俯冲变质之前或俯冲变质的早期。这3类岩石一经形成,都经历了其后的叠加变质作用,进而表明Zermatt-Saas蛇绿岩经历了大洋变质、与俯冲、折返和抬升有关的高压变质和区域变质、绿片岩相变质和晚期热液变质作用的pT轨迹演化,代表着西阿尔卑斯从洋脊变质作用到俯?李旭平 Meinert RAHN Kurt BUCHER 张立飞 2003地学前缘2003,10,4:7
4美国内华达Goldstrike矿区卡林型贝茨金矿同变形的富矿分带显示文摘贝茨金矿是卡林金矿带最大的卡林型矿床 ,由多个高品位富矿体组成。金矿体产于不纯的碳酸盐岩角砾岩和侵入体中 ,明显受构造控制 ,矿体显示出同变形热液沉淀特征。在 NWW向的DDZ剪切褶皱构造带中 ,贝茨金矿的富矿构成空间上的分带形式 ,主要的富矿类型有含金红石的硅质富矿 ,伊利石 -粘土 -黄铁矿富矿 ,含雄黄、雌黄的富矿 ,含辉锑矿的硅质富矿和多金属富矿。研究表明 ,成矿溶液为弱 -中等盐度 ,在构造活动期上升并冷却。变形时水 -岩反应条件和压力 -温度的变化可能引起流体的变化 ,并导致含金流体与围岩的动态反应时间不同而形成富矿分带 ,富含 As,Sb,Hg的金矿石类型是同一成矿系统中的不同部分 ,该系统与侏罗纪后的脆 -韧性变形同时形成。Stephen G.Peters Gregory C.Ferdock Maria B.Woitsekhowskaya Robert Leonardson Jerry Rahn 2000地质找矿论丛2000,15,1:4
5Motor fluctuations and Helicobacter pylori in Parkinson’s disease显示文摘Karl-Erik Rahne Carl Tagesson Dag Nyholm 2013Journal of Neurology2013,,12:2
6Fertilization and Catch Crop Strategies for Improving Tomato Production in North China显示文摘Overuse of fertilizers and the resultant pollution and eutrophication of surface and groundwater is a growing issue in China.Consequently, improved management strategies are needed to optimize crop production with reduced nutrient inputs. Conventional fertilization(CF), reduced fertilization(RF), and reduced fertilization with maize(Zea mays L.) as a summer catch crop(RF+C)treatments were evaluated in 2008 and 2009 by quantifying tomato(Lycopersicon esculentum) fruit yield and soil nutrient balance in a greenhouse tomato double-cropping system. Fertilizer nitrogen(N) application was reduced by 37% in the RF and RF+C treatments compared to the CF treatment with no significant reduction in fruit yield. Mean soil mineral N(Nmin) content to a depth of 180 cm following tomato and maize harvest was lower in the RF and RF+C treatments than in the CF treatment. Residual soil Nmincontent was reduced by 21% and 55% in the RF and RF+C treatments, respectively, compared to the CF treatment. Surplus phosphorus(P)and potassium(K) contents in the RF+C treatment were significantly lower than those in the RF treatment, mainly due to additional P and K uptake by the catch crop. We concluded that for intensive greenhouse production systems, the RF and RF+C treatments could maintain tomato fruit yield, reduce the potential for nitrate(NO-3-N) leaching, and with a catch crop, provide additional benefits through increased biomass production.YUAN Hui-Min Martin BLACKWELL Clive RAHN CHEN Qing 2015Pedosphere2015,25,3:2
7Amplification of an invA gene sequence of Salmonella typhimurium by polymerase chain reaction as a specific methad of detection of Salmonella显示文摘Rahn K Grandis S A Clarke R C 1992Mol Cell Probes1992,6,4:1
8Development of lipase activity in yolk membrane and pancreas of young turkeys显示文摘ESCRIBANO F RAHN B E SELL J L 1988Poultry Science1988,67,:1
9Reaming versus nonreaming intramedullary nailing:Interference with cortical circulation of the canine tibia显示文摘Klein MP Rahn BA Prigg R et a1 1990Arch Orthop Trauma Surg1990,109,6:1
10Amplification of an invA gene sequence of Salmonella typhimurium by polymerase chain reaction as a specific method of detection of Salmonella显示文摘Rahn K De Grandis SA Clarke RC McEwen SA Galan JE Ginocchio C 1992Mol Cell Probes1992,6,4:1
11Parametric representation of the primary hurricane vortex, part 1 : observations and evaluation of the Holland(1980) Model 显示文摘Willoughby H E Rahn M E 2004Monthly Weather Review2004,132,:1
12The sympathetil nervous system in the pathogenesis of hypertension显示文摘Rahn KH Barenbrock 2000J Hum Hypertension2000,42,1:1
13Fracture healing in biological plate osteosynthesis 显示文摘Baumgaertel F Buhl M rahn B A 1998Injury1998,29,3:1
14Vascular remodeling显示文摘Gautier E Rahn BA Perren SM 1995Injury1995,26,2:1
15Incubation of chicken eggs at altitude:Theoretical consideration of optimal gas composition显示文摘Visschedijk A H J Rahn H 1981Bri Poult Sci1981,22,5:1
16显示文摘 H Rahn P Parisi 1980Conder1980,82,:1
17Adaptive vibration control of an axially moving string 显示文摘DE QUEIROZ M S DAWSON D M RAHN C D 1999Journal of Vibration and Acoustics1999,121,1:1
18Effect of intensive blood-pressure lowering and low-dose aspirin in patients with hypertension: principal results of the hypertension optimal treatment (HOT) ransomised trial显示文摘Hansson L Zanchetti A Carruthers SG Dahlof B Elmfeldt D Julius S MenardJ Rahn KH Wedel H Westerling S 1998Lancet1998,351,21:1
19Early temporary porosis of bone induced by internal fixation implants-a reaction to mecrosis,not to stress protection implants显示文摘Perren SM Cordey J Rahn BA 1988Clin Orthop1988,,232:1
20Design of Continuous Backbone,Cable-Driven Robots显示文摘Li C Rahn C D 2002ASME Journal of Mechanical Design2002,124,6:1
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