Search Results - "Bowring, SA"

High-precision geochronology links the Ferrar large igneous province with early-Jurassic ocean anoxia and biotic crisis by Burgess, S.D., Bowring, S.A., Fleming, T.H., Elliot, D.H.

“…Apparent synchrony between eruption/emplacement of large igneous province (LIP) magmas and mass extinction has led to the implication of magmatism as a primary…”
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U–Pb systematics of the McClure Mountain syenite: thermochronological constraints on the age of the 40Ar/39Ar standard MMhb by Schoene, Blair, Bowring, Samuel A.

“…Recent advances in U-Pb geochronology allow unprecedented levels of precision in the determination of geological ages. However, increased precision has also…”
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Reassessing the uranium decay constants for geochronology using ID-TIMS U–Pb data by Schoene, Blair, Crowley, James L., Condon, Daniel J., Schmitz, Mark D., Bowring, Samuel A.

“…As the internal precision of radiometric dates approaches the 0.1% level, systematic biases between different methods have become apparent. Many workers have…”
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Pb and Sr concentrations and isotopic compositions in prehistoric North American teeth: A methodological study by Dudás, F.Ö., LeBlanc, S.A., Carter, S.W., Bowring, S.A.

“…We present Pb and Sr isotopic compositions and elemental concentrations for dentin and enamel from 28 human teeth from 10 locations in the southwestern United…”
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Multi-stage exhumation of young UHP–HP rocks: Timescales of melt crystallization in the D’Entrecasteaux Islands, southeastern Papua New Guinea by Gordon, S.M., Little, T.A., Hacker, B.R., Bowring, S.A., Korchinski, M., Baldwin, S.L., Kylander-Clark, A.R.C.

“…On the D’Entrecasteaux Islands, southeastern Papua New Guinea (PNG), a series of domes expose the youngest known ultrahigh-pressure (UHP) to high-pressure…”
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The role of an H2O-rich fluid component in the generation of primitive basaltic andesites and andesites from the Mt. Shasta region, N California by Grove, T., Parman, S., Bowring, S., Price, R., Baker, M.

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U-Pb zircon and titanite systematics of the Fish Canyon Tuff: an assessment of high-precision U-Pb geochronology and its application to young volcanic rocks by Schmitz, Mark D., Bowring, Samuel A.

“…A large data set of single and multi-grain zircon and titanite analyses from a sample of the Oligocene Fish Canyon Tuff (FCT), a voluminous ash flow from the…”
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Pleistocene melting and rapid exhumation of the Nanga Parbat massif, Pakistan: Age and P– T conditions of accessory mineral growth in migmatite and leucogranite by Crowley, J.L., Waters, D.J., Searle, M.P., Bowring, S.A.

“…Rapid Pleistocene exhumation of the core of the Nanga Parbat massif (northwestern Himalayan syntaxis) is inferred by combining U-Pb dates from monazite,…”
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Apatite–feldspar U–Pb thermochronometer: a reliable, mid-range (∼450°C), diffusion-controlled system by Chamberlain, Kevin R., Bowring, Samuel A.

“…The U–Pb systematics of apatite are commonly dominated by simple volume diffusion, without secondary growth and recrystallization that can affect U–Pb…”
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Priscoan (4.00-4.03 Ga) orthogneisses from northwestern Canada by Bowring, Samuel A., Williams, Ian S.

“…Ancient crustal rocks provide the only direct evidence for the processes and products of early Earth differentiation. SHRIMP zircon U-Th-Pb dating has…”
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Subduction and terrane collision stabilize the western Kaapvaal craton tectosphere 2.9 billion years ago by Schmitz, Mark D, Bowring, Samuel A, de Wit, Maarten J, Gartz, Volker

“…Integrative models of crust and mantle structure, age, and growth of the oldest continental nuclei;the Archean cratons;are critical to understanding the…”
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Eclogites of the Snowbird tectonic zone: petrological and U-Pb geochronological evidence for Paleoproterozoic high-pressure metamorphism in the western Canadian Shield by Baldwin, Julia A., Bowring, Samuel A., Williams, Michael L., Williams, Ian S.

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Coeval Large-Scale Magmatism in the Kalahari and Laurentian Cratons during Rodinia Assembly by Hanson, Richard E., Crowley, James L., Bowring, Samuel A., Ramezani, Jahandar, Gose, Wulf A., Ian W. D. Dalziel, Pancake, James A., Seidel, Emily K., Blenkinsop, Thomas G., Mukwakwami, Joshua

“…We show that intraplate magmatism occurred 1106 to 1112 million years ago over an area of two million square kilometers within the Kalahari craton of southern…”
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Constraints on the thermal evolution of continental lithosphere from U-Pb accessory mineral thermochronometry of lower crustal xenoliths, southern Africa by Schmitz, Mark D., Bowring, Samuel A.

“…U-Pb isotopic thermochronometry of rutile, apatite and titanite from kimberlite-borne lower crustal granulite xenoliths has been used to constrain the thermal…”
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U/Pb Zircon Geochronology and Tempo of the End-Permian Mass Extinction by Bowring, S. A., Erwin, D. H., Jin, Y. G., Martin, M. W., Davidek, K., Wang, W.

“…The mass extinction at the end of the Permian was the most profound in the history of life. Fundamental to understanding its cause is determining the tempo and…”
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Timescales and significance of high-pressure, high-temperature metamorphism and mafic dike anatexis, Snowbird tectonic zone, Canada by Flowers, R. M., Bowring, S. A., Williams, M. L.

“…New geochronological, isotopic and geochemical data for a spectacular swarm of deep crustal migmatitic mafic dikes offer important insight into processes…”
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Evaluation of Duluth Complex anorthositic series (AS3) zircon as a U-Pb geochronological standard: new high-precision isotope dilution thermal ionization mass spectrometry results by Schmitz, Mark D, Bowring, Samuel A, Ireland, Trevor R

“…U-Pb zircon geochronology is increasingly called upon to achieve the resolution of absolute time at the 0.1% to 1% level for rocks of Phanerozoic to Hadean…”
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Timescales of melt generation and the thermal evolution of the Himalayan metamorphic core, Everest region, eastern Nepal by Viskupic, Karen, Hodges, Kip V, Bowring, Samuel A

“…In the Everest region of the Nepalese Himalaya, 40Ar/39Ar and U-Pb geochronology provide evidence for a complex thermal history marked by multiple episodes of…”
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Geochronological constraints on the evolution of high-pressure felsic granulites from an integrated electron microprobe and ID-TIMS geochemical study by Baldwin, Julia A., Bowring, Samuel A., Williams, Michael L., Mahan, Kevin H.

“…A combined geochronological, geochemical, and Nd isotopic study of felsic high-pressure granulites from the Snowbird Tectonic Zone, northern Saskatchewan,…”
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Age of Neoproterozoic Bilatarian Body and Trace Fossils, White Sea, Russia: Implications for Metazoan Evolution by Martin, M. W., Grazhdankin, D. V., Bowring, S. A., Evans, D. A. D., Fedonkin, M. A., Kirschvink, J. L.

“…A uranium-lead zircon age for a volcanic ash interstratified with fossil-bearing, shallow marine siliciclastic rocks in the Zimnie Gory section of the White…”
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