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《《幕》》2008,31(4):422-422
William Watt Hutchison, ＂Hutch＂ to his many friends around the world, was a Scots-born Canadian geologist who served Canada and the IUGS in myriad dynamic and creative ways. Most notably, he served as the IUGS Secretary General （1976-1980） at a pivotal time in its history, and as IUGS President （1984-1987）. The same boundless energy, enthusiasm, skill in communications, and ability to foster teamwork that characterized his work with the IUGS also carried him to preeminent scientific administrative positions in the Canadian Government, 相似文献
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Permo-Carboniferous Radiolarians from the Wupata＇erkan Group, Western South Tianshan, Xinjiang, China 总被引：1，自引：0，他引：1
The Wupata‘erkan Group, also called Wupata‘erkan Formation, distributed in the South Tianshan, Xinjiang,China, mainly consists of gray and dark gray fine-grained clastic rocks, interlayered with volcanic rocks, carbonates and cherts. Some ultra-basic rocks (blocks) punctuate the formation. The formation was variously assigned to Silurian-Middle Devonian, Silurian-Lower Devonian, and pre-Devonian, mainly based on Atrypa bodini Mansuy, Hypothyridina parallelepipedia (Brour.) and Prismatophyllum hexagonum Yoh collected from the limestone interlayers, respectively.However, radiolarian fossils obtained from 24 chert specimens of the Wupata‘erkan Group, mainly include Albaillella sp.cf. A. undulata Deflandre, Albaillella sp. cf. A. paradoxa Deflandre, Albaillella cf. A. deflandrei Gourmelon, Albaillella sp. cf. A. indensis Won, Albaillella sp. cf. A. excelsa Ishiga, Kito and Imoto, Albaillella sp. and Latentifistulidae gen. et. sp.indet., are earliest Carboniferous and Late Permian. The earliest Carboniferous assemblage is characterized by Albaillella sp. cf. A. undulata Deflandre, Albaillella sp. cf. A. paradoxa Deflandre, Albaillella cf. A. deflandrei Gourmelon and Albaillella sp. cf. A. indensis Won, and the Late Permian assemblage by Albaillella sp. cf. A. excelsa Ishiga, Kito and Imoto. This new stratigraphic evidence indicates that the Wupata‘erkan Group is possibly composed of rocks with different ages from Silurian to Permian, and therefore, it is probably an ophiolite mrlange. The discovery of Late Permian Albaillella sp. cf. A. excelsa provides more reliable evidence supporting the existence of a Permian relic ancient oceanic basin in the western part of Xinjiang South Tianshan. 相似文献
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TimReynolds 《《幕》》2004,27(3):219-220
The Sixth European Commission (EC) and international conference on ‘The management and disposal of radioactive waste‘:Euradwaste‘04, was held on 29-31 March 2004 in Luxembourg. 相似文献
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This paper deals with the meta-mafic volcanic rocks of the Gongyiming iron deposit at Baotou, Inner Mongolia. The major and trace elements and REE data indicate that the meta-mafic volcanic rocks occurred in the environment similar to a modern continental rift. Sm-Nd and Rb-Sr isotopic studies indicated that the meta-basic rocks were formed during the Early Neoarchean from 2800 Ma to 2900 Ma and reworked during the Late Neoarchean (2500 Ma) by metamorphism. Because of the separation of the North China Craton from the Siberia Craton during the Middle Proterozoic (1600 Ma), the Rb-Sr systematics of the rocks has been changed. The Se‘ ertengshan greenstone seems to occur during the Middle Archean. A stable continental crust may have existed during the Paleoarchean. 相似文献
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《《幕》》2004,27(4):293-294
While attendance at previous IGC‘s was remarkable, the more than 7,000 earth scientists, exhibitors and guests who met in Florence for the 32^nd International Geological Congress set an all-time record as the highest number of participants. They came from 120 countries and 75% were not Italian. This proportion of foreign attendees was the largest ever; in line with a trend of increasing nonlocal participation, it testifies to the vitality and international character of the IGCs. 相似文献
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《地质与勘探》2012,48(3)
郁山铝土矿矿床是豫西典型的隐伏铝土矿床,本文以西郁山矿段为主较系统阐述了矿床地质、矿体和矿石特征等。矿体赋存于本溪组铁铝质泥岩建造中下覆马家沟组岩溶特征控制矿体的形态,矿体深部延伸受架子沟背斜及断层控制,其上覆地层控制矿体的埋深。矿体厚度空间变化大,A/S与含铝岩系厚度及矿体厚度相关性很小。矿石以鲕粒和泥晶结构为主,少部分具有＂砾中鲕＂结构,显示矿床形成过程中的风化与搬运的复合过程。矿石主要含铝矿物是一水硬铝石（42%～88%）,其次是粘土矿物（高岭石和伊利石）;黄铁矿、菱铁矿较普遍分布于下部矿石中,显示矿石形成于还原性沉积洼地中。铝土矿共伴生有益矿产和元素价值大。本文对进一步研究河南省隐伏铝土矿床有较重要参考意义。 相似文献
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Evolution of the Mesozoic Granites in the Xiong＇ershan-Waifangshan Region, Western Henan Province, China, and Its Tectonic Implications 总被引：4，自引：0，他引：4 
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下载免费PDF全文 Based on the new data of isotopic ages and geochemical analyses, three types of Mesozoic granites have been identified for the Xiong'ershan-Waifangshan region in western Henan Province: high-Ba-Sr I-type granite emplaced in the early stage (～160 Ma), I-type granite in the middle stage (～130 Ma) and anorogenic A-type granite in the late stage (～115 Ma).Geochemical characteristics of the high-Ba-Sr I-type granite suggest that it may have been generated from the thickened lower crust by partial melting with primary residues of amphibole and garnet. Gradual increase of negative Eu anomaly and Sr content variations reflect progressive shallowing of the source regions of these granites from the early to late stage. New 40Ar/39Ar plateau ages of the early-stage Wuzhangshan granite (156.0±1.1 Ma, amphibole) and middle-stage Heyu granite (131.8±0.7 Ma, biotite) are indistinguishable from their SHRIMP U-Pb ages previous published, indicating a rapid uplift and erosion in this region. The representative anorogenic A-type granite, Taishanmiao pluton, was emplaced at ～115 Ma. The evolution of the granites in this region reveals a tectonic regime change from post-collisional to anorogenic between ～160 Ma and ～115 Ma. The genesis of the early- and middle-stage I-type granites could be linked to delamination of subducted lithosphere of the Qinling orogenic belt, while the late-stage A-type granites represent the onset of extension and the end of orogenic process. In fact, along the Qinling -Dabie-Sulu belt, the Mesozoic granitoids in western Henan, Dabieshan and Jiaodong regions are comparable on the basis of these temporal evolutionary stages and their initial 87Sr/86Sr ratios,which may suggest a similar geodynamic process related to the collision between the North China and Yangtze cratons. 相似文献
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《地质与勘探》2012,48(3)
通过对河南省新安县郁山铝土矿床成矿时代、成矿物源、成矿环境、控矿因素等分析,认为郁山铝土矿床成矿时代为早二叠世,成矿物源主要为古陆铝硅酸岩风化物,少量为豫西中奥陶统马家沟组碳酸盐岩风化产物,成矿环境为渑池泻湖东北边缘的潮坪-沼泽环境,由长期的沉积间断、特定的岩相古地理特征、构造变形和表生风化作用共同控制矿床的形成。认为郁山铝土矿床的形成经历了＂三期五阶段＂：＂三期＂包括铝土矿体就位、埋藏、改造保存三个成矿时期;具体可划分为＂五阶段＂,包括物源准备和搬运、同生、成岩、后生、风化和表生五个成矿阶段。提出了郁山铝土矿矿床为＂古陆风化＋碎屑和化学沉积＂的成矿模式。其主要成矿机制为机械和化学分异。 相似文献
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《《幕》》2008,31(3):335-335
William Watt Hutchison, ＂Hutch＂ to his many friends around the world, was a Scots-born Canadian geologist who served Canada and the IUGS in myriad dynamic and creative ways. Most notably, he served as the IUGS Secretary General （1976-1980） at a pivotal time in its history, and as IUGS President （1984-1987）. The same boundless energy, enthusiasm, skill in communications, 相似文献
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The Chang＇E-1 and Chang＇E-2 missions have successfully obtained a huge amount of ltmar scientific data, through the seven onboard instruments including a CCD stereo camera, a laser altimeter, an interference imag- ing spectrometer, an X-ray spectrometer, a microwave radiometer, a high-energy particle detector and a solar-wind ion detector. Most of the Chang＇E data are now publicly available to the science community, and this article serves as an official guide on how these data are classified and organized, and how they can be retrieved from http：//159.226.88.59：7779/CE1OutENGWeb/. This article also presents the detailed specifications of various instru- ments and gives examples of research progress made based on these instruments. 相似文献
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《地质与勘探》2012,48(5)
本文统计了豫西熊耳山地区53个金矿床（点）,编绘了熊耳山地区金矿床分布图。系统的野外矿床地质观察以及熊耳山地区矿床分布图都显示,该区金矿的主要控矿要素为太华群变质结晶基底、北西向和北东向断裂构造,以及燕山期酸性侵入岩。太华群处于熊耳山核部,南北两侧以不整合接触带分别与熊耳群及新生代地层相拆离。矿集区45％的金矿床分布于太华群内,从鲁山、熊耳山到小秦岭．金矿化程度增强,而太华群中的金丰度依次降底,显示太华群提供了部分成矿物质。近东西向马超营断裂为熊耳山地区一级构造单元,其北侧发育一系列北东向次级断层。区内金矿床主要分布于马超营断裂以北,明显沿北东向断层成带分布,且矿床的控矿构造也呈北东向,暗示了北东向断层的控矿特征。研究区内发育有花山、五丈山、合峪、太山庙等大花岗岩体和大量石英斑岩脉和花岗斑岩岩脉。花山岩体和五丈山岩体与地层外接触带是控制金矿床产出重要区域,36％的金矿床产出于岩体附近或角砾岩体内,小型岩脉则广泛发育于各金矿床内。本区1：20万区域化探金含量存在七个异常区,分别与该区金矿床集中分布区相吻合。 相似文献