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12篇 您的检索式:作者名="Gregory A DAVIS"
    题名 作者 年代 出处 被引量
1辽东半岛早白垩世伸展构造组合、形成时代及区域构造内涵显示文摘辽东半岛地区广泛发育了多种不同类型的伸展构造,包括伸展断陷盆地(通远堡、本溪和丹东)、拆离断层(大营子)和变质核杂岩(辽南和万福),它们具有宏观一致性但却表现出一定的差异.西部地区,结伴发育了两个共用同一下盘的变质核杂岩—辽南和万福变质核杂岩;中东部地区发育了大营子拆离断层系;东部地区广泛发育了多个伸展断陷盆地.对于伸展构造相关的同构造侵入岩与伸展断陷盆地火山岩的年代学分析揭示出伸展构造总体发育于135~106Ma之间,但是各个伸展构造发育时间有一定的差异.伸展构造具有运动学统一性、几何学上的不对称性和构造-岩浆共同活动性;它们在形成时间上具有差异性与跨越性,区域产状变化与切割深度的不一致性;伸展构造宏观上构成共轭组合,但单个伸展构造却具有不对称性.华北、东北、华南乃至蒙古和俄罗斯远东地区的早白垩世伸展构造与辽东半岛地区伸展构造的发育具有统一的组合规律,可以认为辽东半岛地区伸展构造的发育是东亚早白垩世伸展构造域的缩影.Izanagi板块与欧亚板块之间的交互作用以及东亚地区岩石圈结构调整、深部流体活动性和壳幔拆离作用是制约东亚地区早白垩世伸展构造发育的重要因素.刘俊来 纪沫 申亮 关会梅 Gregory A DAVIS 2011中国科学:地球科学2011,41,5:52
2Early Cretaceous extensional structures in the Liaodong Peninsula:Structural associations,geochronological constraints and regional tectonic implications显示文摘Various extensional structures,e.g.,half grabens,detachment faults,and metamorphic core complexes,were formed in the Liaodong Peninsula.There are two metamorphic core complexes (mcc's) in the western part of the Peninsula,i.e.the Liaonan mcc and the Wanfu mcc.They share the same lower plate and constitute a conjugate mcc pair.The Dayingzi detachment fault system and the three half grabens are exposed in the central and eastern parts,respectively.U-Pb dating of zircons from syntectonic plutons in the lower plates of the detachment faults and volcanic rocks from half graben basins indicates that their formation spans from 135 to 106 Ma,although the individual structure may be formed at a particular stage.Despite the differences in age of formation,in the regional attitudes,and in rooting depths,the extensional structures have great similarities in their kinematics,geometrical asymmetry,and coeval tectono-magmatic activities etc.Macroscopically,the extensional structures constitute conjugate associations,but a particular one generally has asymmetric patterns.Early Cretaceous extensional structures extend from the Liaodong Peninsula to North China,Northeast China,South China,and eastern Mongolia and Transbaikal area in Russia.The extensional structures from different areas share many common features.The Liaodong Peninsula is the miniature of the East Asia with respect to the formation of extensional structures in Early Cretaceous.It is suggested that the interaction of the Izanagi Plate with Eurasia Plate is responsible for the extension of crust.The structural mobility of the lithosphere,partly attributed to the fluid flow at the depth,and detachment faulting in both the crustal and mantle lithosphere provide important constraints on the development of Early Cretaceous extensional structures in the East Asia.LIU JunLai JI Mo SHEN Liang GUAN HuiMei Gregory A DAVIS 2011Science China Earth Sciences2011,54,6:38
3辽东半岛大营子拆离断层系及其区域构造意义显示文摘华北克拉通晚中生代发生了大规模岩石圈减薄并伴随着地壳层次区域性伸展作用的发生.在此伸展背景下,华北克拉通区发育有一系列的伸展构造,大营子拆离断层系即为一个典型实例、大营子拆离断层系位于华北克拉通东部(辽东半岛东南部),主要由上盘火山-沉积盆地,大营子-黄花甸拆离断层带以及下盘古元古代变质岩系和侵入岩体三部分组成.依据拆离断层带中构造岩组合、构造岩变形显微构造和石英EBSD组构分析揭示出下盘岩石主要经历了从高绿片岩相到低绿片岩相的变形变质过程.基于火山-沉积盆地中火山岩的SHRIMP和LA-ICP-MS锆石U-Pb测年结果,推断伸展构造开始活动于(135±1.2)Ma之前,结束于(127±1)Ma.通过与辽南变质核杂岩及辽东半岛其他伸展构造的对比,以及这些伸展构造的分布及影响深度,可充分说明辽东半岛岩石圈破坏和减薄的不均一性,从而显示出其破坏程度的差异,并藉此探讨了华北克拉通破坏和伸展减薄的不均匀性.申亮 刘俊来 胡玲 纪沫 关会梅 Gregory A DAVIS 2011中国科学:地球科学2011,41,4:24
4The Dayingzi detachment fault system in Liaodong Peninsula and its regional tectonic significance显示文摘Large scale lithosphere thinning is an important characteristic of the destruction of the North China Craton (NCC) during the late Mesozoic. A series of extensional structures were developed under extensional setting, among which is the Dayingzi detachment fault system (DFS). The DFS is constituted by three parts, volcano-sedimentary basins at the hanging wall, the Dayingzi-Huanghuadian detachment fault zone, and Paleoproterozoic metamorphic rock series and Mesozoic plutons at the foot-wall. In the section across the detachment fault zone, there is a sequence of tectonites including fault gouge, microbreccia, cataclastic-mylonites, mylonites, and gneissic biotite monzonite granite. Microstructural characteristics of tectonites and electron backscatter diffraction (EBSD) patterns of quartz indicate that the rocks from the footwall experienced a process from upper greenschist facies to lower greenschist facies. SHRIMP and LA-ICP MS U-Pb dating of zircons from the volcanic rocks in the basins, the tectonic evolution of the DFS is summarized as follows: 1) regional extension started at 135.0±1.2 Ma ago, when the detachment fault cut through the middle crust. Faulting induced the upwelling of magma and eruption of volcanic rocks and deformed a series of medium-acid volcanic rocks; 2) after 135.0±1.2 Ma, a large scale detachment faulting was active cross-cutting the mid-upper crust. The western margin of Jurassic and Triassic granite was ductilly and brittly sheared; besides, the Cretaceous volcano-sedimentary rocks were tilted when the master fault approached the surface; 3) at around 127±1 Ma, the detachment fault stopped its activity and was intruded by the unsheared Cretaceous granite near Chaoyang. Comparison with the Liaonan metamorphic core complex (MCC) and other extensional structures in Liaodong Peninsula led to a general trend of including three zones in the Peninsula: MCC zone, detachment fault systems (DFS) zone, and half graben zone. MCC commonly cuts through the mid-lower crust, DFS through the mid-upper crust, and half graben through the upper crust. Therefore, development of the extensional structures in Liaodong Peninsula indicates that they are the results of crustal extension and thinning at different crustal levels. They may provide a deep insight into the dynamic mechanism, history of destruction and lithosphere thinning of the North China Craton (NCC).SHEN Liang LIU JunLai HU Ling JI Mo GUAN HuiMei Gregory A DAVIS 2011Science China Earth Sciences2011,54,10:17
5一名美国地质学家对中国地球科学和教育的思考显示文摘本文是格瑞高利·艾伦·戴维斯在中国地质大学(北京)为他举办的70华诞生日庆祝会上的讲话,由马文璞教授翻译整理而成。文章在充分肯定中国地质学在政府的支持下取得长足进步的同时,也对中国地学教育、科研状况提出中肯的批评和友好的建议。Gregory A Davis 2006中国地质教育2006,15,1:2
6Total energy expenditure and energy intake in the preschool child: a comparison显示文摘DAVIES P S W COWARD W A GREGORY J WHITE 1994Br J Nutr1994,72,:1
7First-line treatment with zoledronic acid as compared with clodronic acid in multiple myeloma (MRC Myeloma IX): a randomised controlled trial显示文摘Gareth J Morgan Faith E Davies Walter M Gregory Kim Cocks Sue E Bell Alex J Szubert Nuria Navarro-Coy Mark T Drayson Roger G Owen Sylvia Feyler A John Ashcroft Fiona Ross Jennifer Byrne Huw Roddie Claudius Rudin Gordon Cook Graham H Jackson J Anthony Chil 2010The Lancet . 2010 (9757)2010,,:1
8Time to treatment with intravenous alteplase and outcome in stroke: an updated pooled analysis of ECASS, ATLANTIS, NINDS, and EPITHET trials显示文摘Kennedy R Lees Erich Bluhmki Rüdiger von Kummer Thomas G Brott Danilo Toni James C Grotta Gregory W Albers Markku Kaste John R Marler Scott A Hamilton Barbara C Tilley Stephen M Davis Geoffrey A Donnan Werner Hacke 2010The Lancet2010,,9727:1
9Effects of single dose, postinduction dexamethasone on recovery after cardiac surgery显示文摘Jean-Pierre Yared Norman J Starr Frederick K Torres C.Allen Bashour Gregory Bourdakos Marion Piedmonte Judith A Michener Jeffrey A Davis Thomas E Rosenberger 2000The Annals of Thoracic Surgery2000,,5:1
10Time to treatment with intravenous alteplase and outcome in stroke: an updated pooled analysis of ECASS, ATLANTIS, NINDS, and EPITHET trials显示文摘Kennedy R Lees Erich Bluhmki Rüdiger von Kummer Thomas G Brott Danilo Toni James C Grotta Gregory W Albers Markku Kaste John R Marler Scott A Hamilton Barbara C Tilley Stephen M Davis Geoffrey A Donnan Werner Hacke 2010The Lancet2010,,9727:1
11Video Compression Employing Algorithm Using Temporal Blocking Structures显示文摘GREGORY N DAVIES A R DARNELL M 2001Electronics letters2001,37,9:1
12Mesozoic tectonic evolution of the Yanshan fold and thrust belt, with emphasis on Hebei and Liaoning provinces, northern China显示文摘Gregory A Davis Zheng Yadong Wang Cong 2001Geological Society of American Memoir2001,194,:1
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