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Геология России: Recent submissions
Now showing items 541-560 of 40116
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(2006)The western end of the Proterozoic Jiangnan orogen is located at Northern Guangxi, South China. Neoproterozoic strongly peraluminous granitoids are dominant (>90%) in the area, with ca. 8% being the mafic-ultramafic rocks. ...
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(2006)The early Jurassic dacites of the Xinglonggou Formation in Beipiao area of West Liaoning Province have similar geochemical characteristics of adakite, which is generated from partial melting of young oceanic crust. Dacites ...
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(2006)The Lhasa block of Tibetan Plateau is one of the most important regions in revealing the collision between India and Asia. The entire processes of collision, from the Tethyan oceanic plate subduction to the subduction of ...
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(2006)There are three ophiolites sited in central Inner Mongolia, representing the sutures between North China craton and Siberia plate. Elemental and Sr-Nd-Pb isotopic geochemistry of the meta-basaltic rocks in Wenduermiao and ...
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(2006)Cenozoic high-Mg and K-rich lavas from Wozhong, western Yunnan province contain abundant olivine phenocrysts with Fo in mineral cores varying between 94 ~ 75%. As a whole, Fo contents decrease from macrophyric olivines ...
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(2006)Volcanic rocks of the Lower Devonian Kalatag formation in the Kalatag region, eastern Tianshan are dominated by Na-rich andesite, rhyolite and dacite rocks with less Na-rich basaltic andesite and basalt and minor basaltic ...
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(2006)The petrology, mineral paragenese and microstructure suggest that the protoliths for the Chenxing metabasite massif in Tunchang area, Hainan Island probably are composed of gabbroic rocks (coarse-grained amphibolites), ...
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PHASE EQUILIBRIA OF GLAUCOPHANE-AND KYANITE-BEARING ECLOGITES IN THE UHP BELT OF WESTERN DABIESHAN (2006)There still have been some disputable opinions on the UHP eclogites in western Dabieshan, especially regarding the stability of glaucophane- and kyanite-bearing assemblages in eclogites, their peak PT conditions and mineral ...
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(2006)The South Tianshan Orogen between the Yili-Kazakhstan and Tarim-Karakum plates is one of the representatives of the Central-Asia. type' Orogen and has undergone complicate tectonic evolution and crustal growth processes. ...
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(2006)Picritic lava flows near Lijiang in the late Permian Emeishan flood basalt province are associated with augite-phyric basalt, aphyric basalt, and pyroclastic units. The dominant phenocryst in the picritic flows is Mg-rich ...
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(2006)Two types of adakites were recognized in northern Xinjiang. The first one is subducted oceanic slab-related adakite and composed of Nb-enriched basalt(NEB) and high-Mg or Mg andesite (HMA or MA). The second one is underplating ...
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(2006)In this paper, we present the combined K-Ar geochronological, elemental and isotopic geochemical data for the felsic volcanics from Xilinhaote-Xiwuqi, Inner Mongolia. The whole-rock K-Ar dating gives an early Triassic age ...
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(2006)Re-Os isotopic age of sulfide ores from Baimazhai Cu-Ni sulphide deposit in Yunnan province was determined by using carius tube decomposing technique, acetone extracted Re and inductively coupled plasma mass spectrometry(ICP-MS). ...
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CONDUIT MODELING OF MAGMA FLOW DYNAMICS: A CASE STUDY ON THE ERUPTIVE PROCESS AT THE TIANCHI VOLCANO (2006)Magma uprising velocity is related to the viscosity, density and pressure of the magma, in the lower part of conduit, and a usual model of a viscous liquid can be applied to simulate the flow dynamics of magma. In the ...
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(2006)The Takeshiken alkali-rich intrusion is a typical postorogenic pluton in Chinese Altay orogen. Zircon U-Pb (TIMS) dating yield a 206Pb/238U age of 286 ± 1Ma (MSWD = 0.05), which is interpreted as its formation age. This ...
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(2006)Метасоматиты эйситовой формации – это околорудно измененные породы, выделенные, изученные и описанные на урановых («классические», низкотемпературные), редкометальных, полиметаллических, а также на золоторудных (кварц-жильного ...
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(2006)A numerical model of chemical weathering in soil horizons and underlying bedrock (WITCH) has been coupled to a numerical model of water and carbon cycles in forest ecosystems (ASPECTS) to simulate the concentration of major ...
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(2006)When recent geological calibrations of the 176Lu decay constant are used, the 176Lu-176Hf ages of chondrites are consistently 4% too old (?4.75 Ga). Here, we suggest that this discrepancy reflects the photoexcitation of ...
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(2006)Магнетит постоянно присутствует в измененных ультраосновных породах, прежде всего, в хризотиловых и антигоритовых серпентинитах, в виде рассеянной вкрапленности и является продуктом выноса железа из минералов исходных пород ...
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(2006)В настоящее время в западной литературе доминирует мнение, что формирование всего разнообразия альпинотипных ультрамафитов континентов и океанов есть результат не столько частичного плавления пиролита мантии, сколько ...
Now showing items 541-560 of 40116