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40Ar/39Ar dating of ignimbrite from Inner Mongolia,northeastern China,indicates a post-Middle Jurassic age for the overlying Daohugou Bed

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40Ar/39Ar dating of ignimbrite from Inner Mongolia,northeast...

中国科学院地质与地球物理研究所2004学术年会

作者： a.boven Graystreet 133 B-1050 BrusselsBelgium.

[1]The Ar/Ar step heating analyses of K-feldspar derived from the ignimbrite in Inner Mongolia,China indicates that they were formed at 159.8±0.8 Ma,which provides a maximum age for the overlying fossilbearing lacustrine deposits(Daohugou Bed).This result favors a post-Middle Jurassic(Late Jurassic or younger), rather than the Middle Jurassic age for the Daohugou Bed. Such a result is generally consistent with vertebrate biostratigraphic evidence,providing a maximum known

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Timing of the Jiufotang Formation(Jehol Group) in Liaoning,northeastern China,and its implications

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Timing of the Jiufotang Formation(Jehol Group) in Liaoning,n...

中国科学院地质与地球物理研究所2004学术年会

作者： a.boven Vrije Universiteit Brussel.Pleinlaan 2.1050 Brussels.Belgium

[1]The timing of the Jiufotang Formation remains speculative despite recent progress in the study of the Jehol *** this paper we contribute to this topic with Ar/Ar dating on K-feldspar(sanidine and orthoclase) from tuffs interbedded within the fossil-bearing shales of the Jiufotang Formation,from the upper part of the Jehol Group in Chaoyang,Liaoning,northeastern ***/Ar step heating analyses of K-feldspar and the SHRIMP U-Pb zircon

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40Ar/39Ar dating of Lujiatun Bed(Jehol Group) in Liaoning,northeastern China

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40Ar/39Ar dating of Lujiatun Bed(Jehol Group) in Liaoning,no...

中国科学院地质与地球物理研究所2006学术年会

作者： a.boven Laboratory of Paleomagnetism and Geochronology(SKL-LE) Institute of Geology and GeophysicsChinese Academy of Sciences

The Lujiatun bed of the Yixian Formation is famous for its extraordinary preservation of three-dimensional fossils and its implication for the most dramatic catastrophic mass mortality event in the Jehol *** precise age of the fossil bearing deposits,however,remains to be established.40Ar/39Ar step heating analyses on bulk K-feldspars from the fossil bearing tuff gave a weighted mean age of 123.2±1.0 Ma(2s).This date suggests the Lujiatun bed was most likely deposited at about the same time as the Jianshangou bed of the lower Yixian Formation, representing a stage when the dinosaurs displayed the most significant radiation in the Early Cretaceous.

关键词： 40Ar/39Ar dating Jehol Group Lujiatun Bed

^(40)Ar/^(39)Ar Age and Geological Significance of Lamprophyres in Pishan on the SW Margin of the Tarim Terrane, NW China

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Acta Geologica Sinica(English Edition) 2003年第1期77卷 36-43页

作者： Ariel boven Laboratory of Geochronology Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium

The dike swarm of lamprophyres at Pishan on the SW margin of the Tarimterrane is composed of ultra-potassic lamprophyres that have intruded into the Proterozoichornblende schists. ^(40)Ar/^(39)Ar dating data suggest that the isochron ages for phlogopite andwhole rock separates of the lamprophyres are 231.7+-0.3 Ma and 228.5+-0.3 Ma, *** data indicate that the dikes were derived from a subduction-related or metasomatizedmantle. During the Middle-Late Triassic the western Kunlun area entered the post-orogeny period, andthus the occurrence of the dike swarm in the study area may have been controlled by underplating.

关键词： Tarim western Kunlun Triassic lamprophyre Ar-Ar age

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应用UV激光显微探针技术测定金云母的^40Ar／^39Ar年龄剖面

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科学通报 2004年第16期49卷 1673-1676页

作者：贺怀宇王非桑海清王英兰 a.boven 朱日祥中国科学院地质与地球物理研究所北京100029 Laboratory of Geochronology Vrije Universiteit BrusselPleinlaan21050BrusselsBelgium

UV激光40Ar/39Ar显微探针技术能对含钾矿物进行微区分析, 测定其年龄剖面, 真实地反映Ar同位素在矿物晶体内的分布, 拓展了常规40Ar/39Ar年代学的应用领域. 本文对新疆皮山煌斑岩中金云母进行了常规40Ar/39Ar阶段升温和UV激光40Ar/39Ar... 详细信息

UV激光40Ar/39Ar显微探针技术能对含钾矿物进行微区分析, 测定其年龄剖面, 真实地反映Ar同位素在矿物晶体内的分布, 拓展了常规40Ar/39Ar年代学的应用领域. 本文对新疆皮山煌斑岩中金云母进行了常规40Ar/39Ar阶段升温和UV激光40Ar/39Ar微区分析对比, 结果显示金云母内Ar同位素分布均匀, 激光微区分析结果与阶段升温结果一致. 使用激光微区分析系统能准确测定矿物颗粒内的年龄剖面, 为经历复杂热历史的样品提供了一种新的40Ar/39Ar微区年代学研究方法.

关键词：激光显微探针煌斑岩金云母 ^40Ar/^39Ar定年年代学

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Brain antigens in functionally distinct antigen-presenting cell populations in cervical lymph nodes in MS and EAE

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世界最新医学信息文摘 2017年第30期 281-281页

作者： Marloes van Zwam Ruth Huizinga Marie-José Melief Annet F.Wierenga-Wolf Marjan van Meurs Jane S.Voerman Knut P.H.Biber Hendrikus W G.M.Boddeke Uta E.H?pken Christian Meisel Andreas Meisel Ingo Bechmann Rogier Q.Hintzen Bert A.'t Hart Sandra Amor Jon D.Laman leonie a.boven

Drainage of central nervous system(CNS) antigens to the brain-draining cervical lymph nodes(CLN) is likely crucial in the initiation and control of autoimmune responses during multiple sclerosis(MS).We demonstrate neuronal antigens within CLN of MS *** monkeys and mice with experimental autoimmune encephalomyelitis(EAE) and in mouse models with non-inflammatory CNS damage,the type and extent of CNS damage was associated with the frequencies of CNS antigens within the cervical lymph *** addition,CNS antigens drained to the spinal-cord-draining lumbar lymph *** human MS CLN,neuronal antigens were present in pro-inflammatory antigen-presenting cells(APC),whereas the majority of myelincontaining cells were *** may reflect a different origin of the cells or different drainage ***,neuronal antigen-containing cells in human CLN did not express the lymph node homing receptor CCR7,whereas myelin antigen-containing cells in situ and in vitro ***,CLN from EAE-affected CCR7-deficient mice contained equal amounts of myelin and neuronal antigens as wild-type *** conclude that the type and frequencies of CNS antigens within the CLN are determined by the type and extent of CNS ***,the presence of myelin and neuronal antigens in functionally distinct APC populations within MS CLN suggests that differential immune responses can be evoked.

关键词： Neuroinflammation Immune regulation Autoreactive Tcells Tolerance Chemokines Cytokines

Brain antigens in functionally distinct antigen-presenting cell populations in cervical lymph nodes in MS and EAE

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世界最新医学信息文摘 2016年第11期 8-8页

作者： Marloes van Zwam Ruth Huizinga Marie-José Melief Annet F.Wierenga-Wolf Marjan van Meurs Jane S.Voerman Knut P.H.Biber Hendrikus W.G.M.Boddeke Uta E.H?pken Christian Meisel Andreas Meisel Ingo Bechmann Rogier Q.Hintzen Bert A.‘t Hart Sandra Amor Jon D.Laman leonie a.boven

Drainage of central nervous system(CNS) antigens to the brain-draining cervical lymph nodes(CLN) is likely crucial in the initiation and control of autoimmune responses during multiple sclerosis(MS). We demonstrate neuronal antigens within CLN of MS patients. In monkeys and mice with experimental autoimmune encephalomyelitis(EAE) and in mouse models with non-inflammatory CNS damage, the type and extent of CNS damage was associated with the frequencies of CNS antigens within the cervical lymph nodes. In addition, CNS antigens drained to the spinal-cord-draining lumbar lymph nodes. In human MS CLN, neuronal antigens were present in pro-inflammatory antigen-presenting cells(APC), whereas the majority of myelincontaining cells were anti-inflammatory. This may reflect a different origin of the cells or different drainage mechanisms. Indeed, neuronal antigen-containing cells in human CLN did not express the lymph node homing receptor CCR7, whereas myelin antigen-containing cells in situ and in vitro did. Nevertheless, CLN from EAE-affected CCR7-deficient mice contained equal amounts of myelin and neuronal antigens as wild-type mice. We conclude that the type and frequencies of CNS antigens within the CLN are determined by the type and extent of CNS damage. Furthermore, the presence of myelin and neuronal antigens in functionally distinct APC populations within MS CLN suggests that differential immune responses can be evoked.

关键词： Neuroinflammation Immune regulation Autoreactive Tcells Tolerance Chemokines Cytokines

Ultra-violet laser probe measurement of 40Ar/39Ar age profile in phlogopite

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Ultra-violet laser probe measurement of 40Ar/39Ar age profil...

中国科学院地质与地球物理研究所2004学术年会

作者： boven Ariel Laboratory of Geochronology.Vrije Universiteit Brussel Pleinlaan 21050 BrusselsBelgium

Ultra-Violet Laser Ablation Microprobe(UVLAMP) extraction technique enables the direct investigation of Ar-Ar age profile in crystals,and yields more information on rates and durations of geological process than conventional single time *** flakes from lamprophyre at Pishan dyke in western Kunlun were dated by using an UV laser(λ=213 nm) microprobe with spot *** results show good agreement with those from the conventional Ar/Ar step heating *** indicates that the Ar isotopes are distributed homogenously in the phlogopite and the UVLAMP can be a powerful tool in the study of thermal history.

关键词： laser probe lamprophyre phlogopite 40Ar/39Ar

塔里木地台西南缘皮山煌斑岩的^(40)Ar/^(39)Ar年龄及其地质意义

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地质学报 2003年第1期77卷 54-54页

作者：贺怀宇郭正府 a.boven 王松山郝杰刘强中国科学院地质与地球物理研究所北京100029 Laboratory of Geochronology Vrije Universiteit BrusselPleinlaan 21050BrusselsBelgium

塔里木地台西南缘皮山县煌斑岩脉群为超钾系列的煌斑岩,侵位于元古宇角门片岩中。经^(40)Ar/^(39)Ar法测定,煌斑岩中金云母的等时线年龄为(231.7±0.3)Ma,全岩等时线年龄为(228.5±0.3)Ma。

关键词：塔里木地台煌斑岩氩同位素等时线年龄岩浆

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