Search Results - "Pearce, N. J. G."

Volcanic ash layers in Lake El'gygytgyn: eight new regionally significant chronostratigraphic markers for western Beringia by van den Bogaard, C, Jensen, B. J. L, Pearce, N. J. G, Froese, D. G, Portnyagin, M. V, Ponomareva, V. V, Wennrich, V

“…Ash layers from explosive volcanic eruptions (i.e., tephra) represent isochronous surfaces independent from the environment in which they are deposited and the…”
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Underestimated risks of recurrent long-range ash dispersal from northern Pacific Arc volcanoes by Bourne, A. J., Abbott, P. M., Albert, P. G., Cook, E., Pearce, N. J. G., Ponomareva, V., Svensson, A., Davies, S. M.

“…Widespread ash dispersal poses a significant natural hazard to society, particularly in relation to disruption to aviation. Assessing the extent of the threat…”
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Tephrochronology of the Toba tuffs: four primary glass populations define the 75-ka Youngest Toba Tuff, northern Sumatra, Indonesia by WESTGATE, J. A., PEARCE, N. J. G., PERKINS, W. T., PREECE, S. J., CHESNER, C. A., MUHAMMAD, R. F.

“…ABSTRACT Four primary glass populations, well defined by their Sr, Ba and Y concentrations, occur in the Youngest Toba Tuff (YTT), which was deposited during a…”
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Multiple melt bodies fed the AD 2011 eruption of Puyehue-Cordón Caulle, Chile by Alloway, B. V., Pearce, N. J. G., Villarosa, G., Outes, V., Moreno, P. I.

“…Within the volcanological community there is a growing awareness that many large- to small-scale, point-source eruptive events can be fed by multiple melt…”
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A catalogue of major and trace element data for Icelandic Holocene silicic tephra layers by Meara, RH. H., Thordarson, TH, Pearce, N. J. G., Hayward, C., Larsen, G.

“…ABSTRACT Tephra layers with Icelandic provenance have been identified across the North Atlantic region in terrestrial, lacustrine, marine and glacial…”
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Determining the K-content of single-grains of feldspar for luminescence dating by Smedley, R.K., Duller, G.A.T., Pearce, N.J.G., Roberts, H.M.

“…Feldspars form a solid-solution series whereby the K-content may range from 0 to 14%. LA-ICP-MS measurements for density-separated single-grains of feldspar…”
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Dating diagenetic monazite in mudrocks; constraining the oil window? by Evans, J. A, Zalasiewicz, J. A, Fletcher, I, Rasmussen, B, Pearce, N. J. G

“…Authigenic monazite nodules, increasingly recognized in Pre-Mesozoic mudrock successions, provide a means for dating diagenesis by exploiting trace uranium…”
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Field Trials of Low-cost Reactive Media for the Passive Treatment of Circum-neutral Metal Mine Drainage in Mid-Wales, UK by Warrender, R., Pearce, N. J. G., Perkins, W. T., Florence, K. M., Brown, A. R., Sapsford, D. J., Bowell, R. J., Dey, M.

“…This paper addresses the ability of five low-cost reactive materials to remove Zn, Pb, and Cd from Fe-poor, circum-neutral pH metal mine water in Mid-Wales,…”
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Metal distribution during diagenesis in the contaminated sediments of Dulas Bay, Anglesey, N. Wales, UK by Whiteley, J.D, Pearce, N.J.G

“…The Tessier sequential extraction procedure was applied to discrete layers from 9 sediment cores from Dulas Bay, Anglesey. Results provide data on the chemical…”
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Tephrostratigraphy and glass compositions of post-15 kyr Campi Flegrei eruptions: implications for eruption history and chronostratigraphic markers by Smith, V.C., Isaia, R., Pearce, N.J.G.

“…Volcanic ash (tephra) erupted from the frequently active Campi Flegrei volcano forms layers in many palaeoenvironmental archives across Italy and the…”
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Environmental monitoring on shellfish using UV laser ablation ICP-MS by Raith, A., Perkins, W. T., Pearce, N. J. G., Jeffries, T. E.

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Recognition of Santorini (Minoan) Tephra in Lake Sediments from Gölhisar Gölü, Southwest Turkey by Laser Ablation ICP-MS by Eastwood, Warren J., Pearce, Nicholas J.G., Westgate, John A., Perkins, William T.

“…Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) has been applied to the analysis of fine-grained volcanic ash shards separated from a…”
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Bottom water oxygenation history in southeastern Arabian Sea during the past 140 ka: Results from redox-sensitive elements by Pattan, J.N., Pearce, N.J.G.

“…The concentrations of multiple redox-sensitive elements such as Re, U, Mo, Cd, V, Sb, and Tl were determined in sediments from the southeastern Arabian Sea…”
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Internal U, Th and Rb concentrations of alkali-feldspar grains: Implications for luminescence dating by Smedley, R.K., Pearce, N.J.G.

“…This study assesses whether internal U, Th and Rb concentrations of single grains of alkali-feldspar can impact upon luminescence dating. Internal alpha…”
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A widespread compositionally bimodal tephra sourced from Volcán Melimoyu (44°S, Northern Patagonian Andes): Insights into magmatic reservoir processes and opportunities for regional correlation by Geoffroy, C.A., Alloway, B.V., Amigo, À., Parada, M.A., Gutierrez, F., Castruccio, A., Pearce, N.J.G., Morgado, E., Moreno, P.I.

“…We describe the stratigraphy, age, constituent geochemistry and phenocryst thermobarometry of a closely spaced Holocene tephra couplet from Volcán Melimoyu…”
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Constraints in using Cerium-anomaly of bulk sediments as an indicator of paleo bottom water redox environment: A case study from the Central Indian Ocean Basin by Pattan, J.N., Pearce, N.J.G., Mislankar, P.G.

“…The total rare earth elements (∑REE) abundance along with major and a range of trace element chemistry of twenty-eight sub-sections in a 5 m long sediment core…”
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Old Crow tephra across eastern Beringia: a single cataclysmic eruption at the close of Marine Isotope Stage 6 by Preece, S.J., Pearce, N.J.G., Westgate, J.A., Froese, D.G., Jensen, B.J.L., Perkins, W.T.

“…Old Crow tephra is the largest and most widespread Quaternary eruption presently known in eastern Beringia. Its major- and trace-element geochemistry, Fe-Ti…”
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Re-evaluation and extension of the Marine Isotope Stage 5 tephrostratigraphy of the Faroe Islands region: The cryptotephra record by Abbott, P.M., Austin, W.E.N., Davies, S.M., Pearce, N.J.G., Rasmussen, T.L., Wastegård, S., Brendryen, J.

“…Previous studies of marine sequences from the Faroe Islands region have identified a series of coarse-grained tephra horizons deposited during Marine Isotope…”
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Glass compositions and tempo of post-17 ka eruptions from the Afar Triangle recorded in sediments from lakes Ashenge and Hayk, Ethiopia by Martin-Jones, C.M., Lane, C.S., Pearce, N.J.G., Smith, V.C., Lamb, H.F., Oppenheimer, C., Asrat, A., Schaebitz, F.

“…Numerous volcanoes in the Afar Triangle and adjacent Ethiopian Rift Valley have erupted during the Quaternary, depositing volcanic ash (tephra) horizons that…”
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Last glacial period cryptotephra deposits in an eastern North Atlantic marine sequence: Exploring linkages to the Greenland ice-cores by Abbott, P.M., Bourne, A.J., Purcell, C.S., Davies, S.M., Scourse, J.D., Pearce, N.J.G.

“…The establishment of a tephra framework for the Greenland ice-cores spanning the last glacial period, particularly between 25 and 45 ka b2k, provides strong…”
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