Institution
Northwest University (China)
Education•Xi'an, China•
About: Northwest University (China) is a education organization based out in Xi'an, China. It is known for research contribution in the topics: Zircon & Catalysis. The organization has 17026 authors who have published 16954 publications receiving 253149 citations. The organization is also known as: Northwest University (China) & Xīběi Dàxué.
Topics: Zircon, Catalysis, Craton, Graphene, Population
Papers published on a yearly basis
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University of Oxford1, Federal University of São Paulo2, University of the Witwatersrand3, Stellenbosch University4, Liverpool School of Tropical Medicine5, University of Sheffield6, University of London7, Newcastle upon Tyne Hospitals NHS Foundation Trust8, University Hospital Southampton NHS Foundation Trust9, University Hospitals Bristol NHS Foundation Trust10, Guy's and St Thomas' NHS Foundation Trust11, University Hospitals Birmingham NHS Foundation Trust12, St George's, University of London13, AstraZeneca14, North Bristol NHS Trust15, University College Hospital16, University of Hull17, Escola Bahiana de Medicina e Saúde Pública18, Federal University of Rio Grande do Norte19, Northwest University (China)20, Universidade Federal de Santa Maria21, Glasgow Dental Hospital and School22, Boston Children's Hospital23, Universidade Federal do Rio Grande do Sul24, Western General Hospital25, University of Glasgow26, Cambridge University Hospitals NHS Foundation Trust27, University of Cambridge28, Nottingham University Hospitals NHS Trust29, Aneurin Bevan University Health Board30
TL;DR: ChAdOx1 nCoV-19 has an acceptable safety profile and has been found to be efficacious against symptomatic COVID-19 in this interim analysis of ongoing clinical trials.
3,741 citations
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TL;DR: In this paper, an internal standard-independent calibration strategy for LA-ICP-MS analysis of anhydrous minerals and glasses was described, where the ablation yield correction factor (AYCF) was used to correct the matrix-dependent absolute amount of materials ablated during each run.
2,995 citations
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TL;DR: In this article, the first finding of continental crust-derived Precambrian zircons in garnet/spinel pyroxenite veins within mantle xenoliths carried by the Neogene Hannuoba basalt in the central zone of the North China Craton (NCC).
Abstract: We present the first finding of continental crust-derived Precambrian zircons in garnet/spinel pyroxenite veins within mantle xenoliths carried by the Neogene Hannuoba basalt in the central zone of the North China Craton (NCC). Petrological and geochemical features indicate that these mantle-derived composite xenoliths were formed by silicic melt^lherzolite interaction. The Precambrian zircon ages can be classified into three age groups of 2·4^2·5 Ga, 1·6^2·2 Ga and 0·6^1·2 Ga, coinciding with major geological events in the NCC. These Precambrian zircons fall in the field of continental granitoid rocks in plots of U/Yb vs Hf and Y. Their igneous-type REE patterns and metamorphic zircon type CL images indicate that they were not crystallized during melt^peridotite interaction and subsequent high-pressure metamorphism.The 2·5 Ga zircons have positive eHf(t) values (2·9^10·6), whereas the younger Precambrian zircons are dominated by negative eHf(t) values, indicating an ancient continental crustal origin.These observations suggest that the Precambrian zircons were xenocrysts that survived melting of recycled continental crustal rocks and were then injected with silicate melt into the host peridotite. In addition to the Precambrian zircons, igneous zircons of 315 3 Ma (2 ), 80^170 Ma and 48^64 Ma were separated from the garnet/spinel pyroxenite veins; these provide evidence for lower continental crust and oceanic crust recycling-induced multi-episodic melt^peridotite interactions in the central zone of the NCC. The combination of the positive eHf(t) values (2·91^24·6) of the 315 Ma zircons with the rare occurrence of 302^324 Ma subduction-related diorite^granite plutons in the northern margin of the NCC implies that the 315 Ma igneous zircons might record melt^peridotite interactions in the lithospheric mantle induced by Palaeo-Asian oceanic crust subduction. Igneous zircons of age 80^170 Ma generally coexist with the Precambrian metamorphic zircons and have lower Ce/Yb and Th/U ratios, higher U/Yb ratios and greater negative Eu anomalies.The eHf(t) values of these zircons vary greatly from ^47·6 to 24·6.The 170^110 Ma zircons are generally characterized by negative eHf(t) values, whereas the 110^100 Ma zircons have positive eHf(t) values.These observations suggest that melt^peridotite interactions at 80^170 Ma were induced by partial melting of recycled continental crust. The 48^64 Ma igneous zircons are characterized by negligible Ce anomalies, unusually high REE, U and Th contents, and positive eHf(t) values.These features imply that the melt^peridotite interactions at 48^64 Ma could be associated with a depleted mantle-derived carbonate melt or fluid.
2,753 citations
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TL;DR: It is suggested that lower crustal foundering occurred within the North China craton during the Late Jurassic, and thus provides constraints on the timing of lithosphere removal beneath the NorthChina craton.
Abstract: Foundering of mafic lower continental crust into underlying convecting mantle has been proposed as one means to explain the unusually evolved chemical composition of Earth's continental crust, yet direct evidence of this process has been scarce. Here we report that Late Jurassic high-magnesium andesites, dacites and adakites (siliceous lavas with high strontium and low heavy-rare-earth element and yttrium contents) from the North China craton have chemical and petrographic features consistent with their origin as partial melts of eclogite that subsequently interacted with mantle peridotite. Similar features observed in adakites and some Archaean sodium-rich granitoids of the tonalite-trondhjemite-granodiorite series have been interpreted to result from interaction of slab melts with the mantle wedge. Unlike their arc-related counterparts, however, the Chinese magmas carry inherited Archaean zircons and have neodymium and strontium isotopic compositions overlapping those of eclogite xenoliths derived from the lower crust of the North China craton. Such features cannot be produced by crustal assimilation of slab melts, given the high Mg#, nickel and chromium contents of the lavas. We infer that the Chinese lavas derive from ancient mafic lower crust that foundered into the convecting mantle and subsequently melted and interacted with peridotite. We suggest that lower crustal foundering occurred within the North China craton during the Late Jurassic, and thus provides constraints on the timing of lithosphere removal beneath the North China craton.
1,495 citations
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TL;DR: The crustal growth and stabilization of the North China Craton (NCC) relate to three major geological events in the Precambrian: (1) a major phase of continental growth at ca. 2.9-2.7 Ga, (2) the amalgamation of micro-blocks and cratonization at 2.5-3.5 Ga, and (3) Paleoproterozoic rifting-subduction-accretion-collision tectonics and subsequent high-grade granulite facies metamorphism-granitoid mag
1,320 citations
Authors
Showing all 17136 results
Name | H-index | Papers | Citations |
---|---|---|---|
Jun Wang | 166 | 1093 | 141621 |
Rui Zhang | 151 | 2625 | 107917 |
Jian Li | 133 | 2863 | 87131 |
Chao Zhang | 127 | 3119 | 84711 |
Bo Wang | 119 | 2905 | 84863 |
Guochun Zhao | 113 | 406 | 40886 |
Jaspal S. Kooner | 109 | 284 | 65969 |
Bernard Wood | 108 | 630 | 38272 |
Mark C. Hersam | 107 | 659 | 46813 |
Jun Wang | 106 | 1031 | 49206 |
Xi Chen | 105 | 1547 | 52533 |
M. Santosh | 103 | 1344 | 49846 |
Jian Xu | 94 | 1366 | 52057 |
Colin A. Chapman | 92 | 491 | 28217 |
Bin Li | 92 | 1755 | 42835 |