90 research outputs found

    Geochemistry And Petrogenesis Of Some Granitoids In The Grenville Province Of Ontario And Their Tectonic Implications

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    Eight granitic bodies from the Grenville Province of Ontario have been petrographically and geochemically studied. It is believed that these granitoids were associated with the Grenville Orogeny and have recorded a history of about 300 million years of magmatism in this region.;Mineralogically, except for the riebeckite-bearing hypersolvus granite of the Deloro Pluton, hornblende and biotite are major mafic minerals for the other subsolvus granitoids. Although chemical compositions are varied from one pluton to the other, the Grenville granitoids are characterized, in general, by high agpaitic indices and oxidation ratios.;Except that the Union Lake quartz diorite is consistently I-type granite and the Barber\u27s Lake peraluminous granite is close to S-type granite, the remaining sampled granitoids fall within both I- and S-type categories. However, the peralkaline Deloro Pluton is an A-type analogue. It is reasonable to believe that the source rocks, P-T conditioned and geological settings of the Grenville granitoids differ from those granites of the Lachlan Mobile Belt of eastern Australia. REE modelling suggests most Grenville granitoids were from a deep source, either lower crust (granulite) or upper mantle (quartz elcogite). This is consistent with their lower strontium initial ratios and high K/Rb.;The close chemical resemblance with the Younger Granite of Nigeria from an extensional environment may imply the existence of a long term extensional regime during the development of the Grenville plutonism. This hypothesis agrees with the Grenville evolution model of opening and closure of the Bancroft - Renfrew aulacogen; the Grenville granitic terrain may thus be interpreted as products of Proterozoic extension - contraction cycles

    The Eos SAR Mission

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    The Eos SAR if a key component of the Eos mission. It is currently being launched on a free flyer in parallel with Eos-A to provide coincident measurements of the Earth's surface over a 15 year time span. This paper provides the latest information on the status of the Eos SAR mission, emphasizes the SAR's role in the overall Eos mission, and compares the Eos SAR under study to the earlier SAR on Eos-B

    The Eos SAR Mission

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    The Eos SAR if a key component of the Eos mission. It is currently being launched on a free flyer in parallel with Eos-A to provide coincident measurements of the Earth's surface over a 15 year time span. This paper provides the latest information on the status of the Eos SAR mission, emphasizes the SAR's role in the overall Eos mission, and compares the Eos SAR under study to the earlier SAR on Eos-B

    Mg-induced increase of band gap in Zn1-xMgxO nanorods revealed by x-ray absorption and emission spectroscopy

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    [[abstract]]X-rayabsorption near-edge structure (XANES) and x-ray emission spectroscopy (XES) measurements were used to investigate the effect of Mgdoping in ZnOnanorods. The intensities of the features in the O K-edge XANES spectra of Zn1−xMgxOnanorods are lower than those of pure ZnOnanorods, suggesting that Mgdoping increases the negative effective charge of O ions. XES and XANES spectra of O 2p states indicate that Mgdoping raises (lowers) the conduction-band-minimum (valence-band-maximum) and increases the band gap. The band gap is found to increase linearly with the Mg content, as revealed by photoluminescence and combined XANES and XES measurements.[[booktype]]紙本[[booktype]]電子版[[countrycodes]]US

    Sex differences modulating serotonergic polymorphisms implicated in the mechanistic pathways of risk for depression and related disorders:

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    Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137310/1/jnr23877.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137310/2/jnr23877_am.pd

    Search for new physics with dijet angular distributions in proton-proton collisions at root S = 13 TeV

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    Search for light bosons in decays of the 125 GeV Higgs boson in proton-proton collisions at root s=8 TeV

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    Search for single production of vector-like quarks decaying into a b quark and a W boson in proton-proton collisions at root s=13 TeV

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    Measurement of the top quark mass using single top quark events in proton-proton collisions at root s=8 TeV

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    Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks

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    A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance p(T)(miss) in transverse momentum. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb(-1). Search regions are defined in terms of the multiplicity of bottom quark jet and top quark candidates, the p(T)(miss) , the scalar sum of jet transverse momenta, and themT2 mass variable. No statistically significant excess of events is observed relative to the expectation from the standard model. Lower limits on the masses of supersymmetric particles are determined at 95% confidence level in the context of simplified models with top quark production. For a model with direct top squark pair production followed by the decay of each top squark to a top quark and a neutralino, top squark masses up to 1020 GeVand neutralino masses up to 430 GeVare excluded. For amodel with pair production of gluinos followed by the decay of each gluino to a top quark-antiquark pair and a neutralino, gluino masses up to 2040 GeVand neutralino masses up to 1150 GeVare excluded. These limits extend previous results.Peer reviewe
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