Search Results - "Perfit, M R"

Seawater cycled throughout Earth’s mantle in partially serpentinized lithosphere by Kendrick, M. A., Hémond, C., Kamenetsky, V. S., Danyushevsky, L., Devey, C. W., Rodemann, T., Jackson, M. G., Perfit, M. R.

“…The extent to which water and halogens in Earth’s mantle have primordial origins, or are dominated by seawater-derived components introduced by subduction is…”
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Sea-Floor Spreading Event Captured by Seismometers by Tolstoy, M, Cowen, J.P, Baker, E.T, Fornari, D.J, Rubin, K.H, Shank, T.M, Waldhauser, F, Bohnenstiehl, D.R, Forsyth, D.W, Holmes, R.C, Love, B, Perfit, M.R, Weekly, R.T, Soule, S.A, Glazer, B

“…Two-thirds of Earth's surface is formed at mid-ocean ridges, yet sea-floor spreading events are poorly understood because they occur far beneath the ocean…”
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The 1998 eruption of Axial Seamount: New insights on submarine lava flow emplacement from high‐resolution mapping by W. W. Chadwick Jr, D. A. Clague, R. W. Embley, M. R. Perfit, D. A. Butterfield, D. W. Caress, J. B. Paduan, J. F. Martin, P. Sasnett, S. G. Merle, A. M. Bobbitt

“…Axial Seamount, an active submarine volcano on the Juan de Fuca Ridge at 46°N, 130°W, erupted in January 1998 along 11 km of its upper south rift zone. We use…”
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Chemical and isotopic constraints on the generation and transport of magma beneath the East Pacific Rise by Sims, K.W.W, Goldstein, S.J, Blichert-toft, J, Perfit, M.R, Kelemen, P, Fornari, D.J, Michael, P, Murrell, M.T, Hart, S.R, DePaolo, D.J, Layne, G, Ball, L, Jull, M, Bender, J

“…Interpretation of U-series disequilibria in midocean ridge basalts is highly dependent on the bulk partition coefficients for U and Th and therefore the…”
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Insights into mid-ocean ridge basalt petrogenesis: U-series disequilibria from the Siqueiros Transform, Lamont Seamounts, and East Pacific Rise by Lundstrom, C. C., Sampson, D. E., Perfit, M. R., Gill, J., Williams, Q.

“…Parent‐daughter disequilibria between (230Th)/(238U), (231Pa)/(235U) and (226Ra)/(230Th) (parentheses refer to activities) have been measured by thermal…”
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Mantle Melting and Basalt Extraction by Equilibrium Porous Flow by Lundstrom, C. C., Gill, J., Williams, Q., Perfit, M. R.

“…The chemical composition of mid-ocean ridge basalt, the most prevalent magma type on the planet, reflects the melt's continuous reequilibration with the…”
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Recent eruptions on the CoAxial segment of the Juan de Fuca Ridge: Implications for mid-ocean ridge accretion processes by Embley, R. W., Chadwick, W. W., Perfit, M. R., Smith, M. C., Delaney, J. R.

“…The 1993 seismic swarm and volcanic eruption on the CoAxial segment of the Juan de Fuca Ridge was the first verified mid‐ocean ridge accretion event monitored…”
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High-precision Pb isotope measurements reveal magma recharge as a mechanism for ore deposit formation: Examples from Lihir Island and Conical seamount, Papua New Guinea by Kamenov, George D., Perfit, Michael R., Jonasson, Ian R., Mueller, Paul A.

“…Lihir Island, part of the Tabar–Lihir–Tanga–Feni island chain in the SW Pacific, hosts the giant Ladolam gold deposit. Polymetallic gold mineralization also…”
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Interaction of sea water and lava during submarine eruptions at mid-ocean ridges by Perfit, Michael R, Cann, Johnson R, Fornari, Daniel J, Engels, Jennifer, Smith, Deborah K, Ian Ridley, W, Edwards, Margo H

“…Lava erupts into cold sea water on the ocean floor at mid-ocean ridges (at depths of 2,500 m and greater), and the resulting flows make up the upper part of…”
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Volatile abundances and oxygen isotopes in basaltic to dacitic lavas on mid-ocean ridges: The role of assimilation at spreading centers by Wanless, V.D., Perfit, M.R., Ridley, W.I., Wallace, P.J., Grimes, C.B., Klein, E.M.

“…Most geochemical variability in MOR basalts is consistent with low- to moderate-pressure fractional crystallization of various mantle-derived parental melts…”
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Dacite Petrogenesis on Mid-Ocean Ridges: Evidence for Oceanic Crustal Melting and Assimilation by Wanless, V. D., Perfit, M. R., Ridley, W. I., Klein, E.

“…Whereas the majority of eruptions at oceanic spreading centers produce lavas with relatively homogeneous mid-ocean ridge basalt (MORB) compositions, the…”
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Geochemical heterogeneity within mid-ocean ridge lava flows: insights into eruption, emplacement and global variations in magma generation by Rubin, K.H., Smith, M.C., Bergmanis, E.C., Perfit, M.R., Sinton, J.M., Batiza, R.

“…Compositional heterogeneity in mid-ocean ridge (MOR) lava flows is a powerful yet presently under-utilized volcanological and petrological tracer. Here, it is…”
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Vapour undersaturation in primitive mid-ocean-ridge basalt and the volatile content of Earth's upper mantle by Saal, Alberto E, Hauri, Erik H, Langmuir, Charles H, Perfit, Michael R

“…The analysis of volatiles in magmatic systems can be used to constrain the volatile content of the Earth's mantle and the influence that magmatic degassing has…”
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Recent volcanism in the Siqueiros transform fault: picritic basalts and implications for MORB magma genesis by Perfit, M.R., Fornari, D.J., Ridley, W.I., Kirk, P.D., Casey, J., Kastens, K.A., Reynolds, J.R., Edwards, M., Desonie, D., Shuster, R., Paradis, S.

“…Small constructional volcanic landforms and very fresh-looking lava flows are present along one of the inferred active strike-slip faults that connect two…”
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Phase relations of a high-Mg basalt from the Aleutian Island arc - Implications for primary island arc basalts and high-Al basalts by Gust, D. A., Perfit, M. R.

“…An experimental investigation of a primitive high-Mg basalt, MK-15, collected from lava flows of the Unalaska Island in the Aleutian Island arc has been…”
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Off-axis volcanism at the East Pacific Rise detected by uranium-series dating of basalts by Goldstein, Steven J, Perfit, Michael R, Batiza, Rodey, Fornari, Daniel J, Murrell, Michael T

“…Radioisotope ages for basalts were used to quantify the spatial extent of young volcanism and crustal accretion on the East Pacific Rise. Determined ages…”
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Geochronology and geochemistry of lavas from the 1996 North Gorda Ridge eruption by Rubin, K.H., Smith, M.C., Perfit, M.R., Christie, D.M., Sacks, L.F.

“…Radiometric dating of three North Gorda Ridge lavas by the 210Po– 210Pb method confirms that an eruption occurred during a period of increased seismic activity…”
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Rhenium systematics in submarine MORB and back-arc basin glasses: laser ablation ICP-MS results by Sun, W., Bennett, V.C., Eggins, S.M., Arculus, R.J., Perfit, M.R.

“…Rhenium and other trace elements, including the moderately chalcophile elements Mo and Cu, were determined for 37 submarine basaltic glasses from the Lau and…”
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Stratigraphic and Petrochemical Data Support Subduction Polarity Reversal of the Cretaceous Caribbean Island Arc by Lebron, M. C., Perfit, Michael R.

“…Stratigraphic and petrochemical data from island arc rocks in the NE Caribbean support previously proposed tectonic models of attempted subduction of the…”
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210Po-210Pb dating of recent volcanic eruptions on the sea floor by RUBIN, K. H, MACDOUGALL, J. D, PERFIT, M. R

“…A new chronometer based on 210polonium-210lead radioactive disequilibrium, which allows researchers to date glassy eruption products within a few years of…”
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