|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 湖南芙蓉锡矿床锡矿石和有关花岗岩的^(40)Ar-^(39)Ar年龄及其地球动力学意义显示文摘在研究和介绍湖南芙蓉锡矿矿床地质特征的基础上 ,对云英岩型锡矿石中的白云母和与成矿有关的骑田岭角闪黑云花岗岩中的黑云母进行了40 Ar_3 9Ar年龄测定 ,获得角闪黑云花岗岩的坪年龄为 (1 5 7.5± 0 .3)Ma;三门云英岩锡矿石的坪年龄为 (1 5 6 .1± 0 .4 )Ma ;淘洗窝云英岩锡矿石的坪年龄 (1 6 0 .1± 0 .9)Ma。这 3组测年数据很一致 ,不仅精确地反应出成岩成矿的时间限制 ,而且表明了花岗岩成岩与锡矿成矿的密切关系。此外 ,三组数据坪年龄一致显示出 ,在成岩成矿之后矿体未受到后期热事件的扰动。芙蓉锡矿床是湘南大型钨锡多金属矿集区的组成部分 ,也是华南地区中生代钨锡成矿两大高峰期之一的 1 6 0~ 1 35Ma期间形成的代表性矿床 。 | 毛景文 李晓峰 Bernd Lehmann 陈文 蓝晓明 魏绍六 | 2004 | 矿床地质2004,23,2: | 138 |
| 2 | 云南昆阳磷矿黑色页岩微量元素特征及其地质意义显示文摘昆阳磷矿是我国下寒武统黑色页岩中赋存的最大的磷块岩矿床。为了探讨磷块岩及上覆黑色页岩的源区性质及古海洋的氧化还原环境,本文对梅树村组中谊村段的磷块岩、石岩头段的黑色页岩以及筇竹寺组玉案山段的砂质黑色页岩的地层剖面进行了岩石地球化学研究。发现昆阳剖面磷矿区的下寒武统黑色页岩Th-Zr和Th-Y/Ho比值以及Y-Y/Ho比值与陆源碎屑物质更为接近,石岩头段黑色页岩样品的稀土元素总量平均为174×10-6,与大陆壳稀土总量的平均丰度基本一致。稀土配分模式也十分类似,说明陆源碎屑物质来源比海水自生来源占的比重更大。受陆源碎屑物质的影响,Ni/Co,V/Cr和V/(V+Ni)等氧化还原敏感元素比值并不能很好的指示古海洋的沉积环境。但石岩头段黑色页岩的氧化还原敏感元素相对大陆壳具有一定程度的富集,并且富集程度不强烈,Ce具有轻微的负异常,反映了黑色页岩可能形成于次氧化环境。 | 徐林刚 Bernd LEHMANN 张锡贵 郑伟 孟庆田 | 2014 | 岩石学报2014,30,6: | 30 |
| 3 | 钼及钼同位素地球化学--同位素体系、测试技术及在地质中的应用显示文摘多接收电感耦合等离子体质谱(MC-ICP-MS)的广泛应用使过渡金属元素同位素地球化学的研究近年来获得蓬勃发展。利用元素双稀释剂法对钼同位素值进行校正,目前可以获得±0.1‰(2σ)的测试精度。自然界中钼同位素分馏δ98/95Mo可达~3‰,其分馏机制与环境的氧化-还原状态有关。在氧化环境下钼以MoO24-的形式与锰的氧化物和氢氧化物共存,并以富集轻钼同位素为特征。在还原环境下由于水体中H2S的存在使MoO24-转换为MoOxS42--x的形式,钼同位素在这一化学过程中分馏作用明显,静水还原环境沉积物(比如黑色页岩)富集重钼同位素。由于具有对氧化-还原环境敏感的特性,钼同位素被认为是反演全球范围内古海洋及古大气氧化环境变化最有效的手段之一。基于最近几年的研究成果,文章对钼同位素体系做了详细论述,包括钼及钼同位素地球化学行为、钼同位素分析测试技术、同位素分馏机理、钼同位素在各种储库中的特征以及应用钼同位素反演古海洋氧化-还原环境和约束矿床成因等,以推动过渡金属元素同位素特别是钼同位素在地球科学领域的研究和应用。 | 徐林刚 Bernd Lehmann | 2011 | 矿床地质2011,30,1: | 13 |
| 4 | 湘西金矿及其区域马底驿组锑分布的多峰结构——累积概率格纸在金矿成因和找矿中的应用显示文摘 | 马东升 Bernd Lehmann | 2000 | 矿物岩石地球化学通报2000,19,4: | 3 |
| 5 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005,,3: | 2 |
| 6 | 锡石LA-ICP-MSU-Pb定年在稀有金属矿床研究中的应用显示文摘原生锡矿床具多种类型,如矽卡岩型、云英岩型、石英脉型、斑岩型、花岗岩型、伟晶岩型和喷流沉积型。如何厘定与锡矿有关的花岗岩的结晶时间,目前已经有了较成熟的原位单矿物U-Pb同位素定年方法,用于定年的副矿物通常包括锆石、独居石、榍石、铌钽矿、磷钇矿等。然而。 | 章荣清 孙卫东 Bernd Lehmann Reimar Seltmann 李聪颖 | 2015 | 矿物学报2015,35,S1: | 2 |
| 7 | Parameters of a severe disease course in ulcerative colitis显示文摘AIM:To detect high risk patients with a progressive disease course of ulcerative colitis(UC) requiring immunosuppressive therapy(IT).METHODS:A retrospective,multicenter analysis of 262 UC patients from eight German tertiary inflammatory bowel disease centres was performed.Patients were divided into two groups depending on the patients need to initiate immunosuppressive therapy in the disease course.A comparison between the two groups was made with regard to demographics,clinical and laboratory parameters obtained within three months after UC diagnosis and the response to first medical therapy.Using this data,a prognostic model was established to predict the individual patients probability of requiring an immunosuppressive therapy.RESULTS:In 104(39.7%) out of 262 patients,UC therapy required an immunosuppressive treatment.Patients in this group were significantly younger at time of diagnosis(HR = 0.981 ± 0.014 per year,P = 0.009),and required significantly more often a hospitalisation(HR = 2.5 ± 1.0,P < 0.001) and a systemic corticosteroid therapy at disease onset(HR = 2.4 ± 0.8,P < 0.001),respectively.Response to steroid treatment was significantly different between the two groups of patients(HR = 5.2 ± 3.9 to 50.8 ± 35.6 compared to no steroids,P = 0.016 to P < 0.001).Furthermore,in the IT group an extended disease(HR = 3.5 ± 2.4 to 6.1 ± 4.0 compared to proctitis,P = 0.007 to P = 0.001),anemia(HR = 2.2 ± 0.8,P < 0.001),thrombocytosis(HR = 1.9 ± 1.8,P = 0.009),elevated C-reactive protein(CRP)(HR = 2.1 ± 0.9,P < 0.001),and extraintestinal manifestations in the course of disease(HR = 2.6 ± 1.1,P = 0.004) were observed.Six simple clinical items were used to establish a prognostic model to predict the individual risk requiring an IT.This probability ranges from less than 2% up to 100% after 5 years.Using this,the necessity of an immunosuppressive therapy can be predicted in 60% of patients.Our model can determine the need for an immunosuppressive drug therapy or if a 'watch and wait' approach is reasonable already early in the treatment course of UC.CONCLUSION:Using six simple clinical parameters,we can estimate the patients individual risk of developing a progressive disease course. | Andreas Stallmach Luisa Nickel Thomas Lehmann Bernd Bokemeyer Martin Bürger Dietrich Hüppe Wolfgang Kruis Susanna Nikolaus Jan C Preiss Andreas Sturm Niels Teich Carsten Schmidt | 2014 | World Journal of Gastroenterology2014,20,35: | 2 |
| 8 | Brain electrical source imaging in manic and depressive episodes of bipolar disorder显示文摘 | Annamaria Painold Pascal L Faber Patricia Milz Eva Z Reininghaus Anna K Holl Martin Letmaier Roberto D Pascual‐Marqui Bernd Reininghaus Hans‐Peter Kapfhammer Dietrich Lehmann | 2014 | Bipolar Disord2014,,7: | 1 |
| 9 | Designing an amperometric thick-film microbial BOD sensor显示文摘 | Chiyui Chan Matthias Lehmann Kinman Chan Puiyee Chan Chiwai Chan Bernd Gruendig Gotthard Kunze Reinhard Renneberg | 2000 | Biosensors and Bioelectronics2000,,7: | 1 |
| 10 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005,,3: | 1 |
| 11 | Molybdenite Re-Os and albite ^40Ar/^39Ar dating of Cu-Au-Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Mao Jingwen Wang Yitian Bernd Lehmann Yu Jinjie Du Andao Mei Yanxiong Li Yongfeng Zang Wenshuan Holly J Stein Zhou Tafa | 2006 | Ore Geology Reviews2006,29,: | 1 |
| 12 | 泰国中部锡矿的成矿作用——成因概念显示文摘泰国中部的锡矿化产于泰-缅交界处山脉中的花岗岩(西部组)中.曼谷东部的花岗岩侵入体和柬埔寨边境附近的花岗岩(东部组)则没有锡矿产出.结晶分离作用是基本的成岩作用,并控制着两组花岗岩的演化.西部组的含锡碱性长石淡色花岗岩表现出分异的最终程度,而在东部组找不到这样相应的岩性特征.这些淡色花岗岩是岩浆结晶分离作用(具原生锡富集特征)、并受到流体改造作用所联合作用的产物.流体作用导致了锡的次生.地球化学贫化,又受到裂隙系统内锡的再分配(即矿化作用)而平衡.这种淡色花岗岩的锡贫化方式对于已知成矿系统提供了锡的远景标志. | Bernd Lehmann 严平兴 | 1990 | 地质科学译丛1990,7,4: | 0 |