Search Results - "ELLAM, R. M"

The graphical presentation of lead isotope data for environmental source apportionment by Ellam, R.M.

“…Lead isotope ratios are widely used to identify original sources of Pb in the environment. Such source apportionment depends on the ability to distinguish…”
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Gondwana break-up related magmatism in the Falkland Islands by Hole, M. J, Ellam, R. M, Macdonald, D. I. M, Kelley, S. P

“…Jurassic dykes (c. 182 Ma) are widespread across the Falkland Islands and exhibit considerable geochemical variability. Orthopyroxene-bearing NW-SE-oriented…”
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Enhanced carbon pump inferred from relaxation of nutrient limitation in the glacial ocean by Pichevin, L. E, Reynolds, B. C, Ganeshram, R. S, Cacho, I, Pena, L, Keefe, K, Ellam, R. M

“…The modern Eastern Equatorial Pacific (EEP) Ocean is a large oceanic source of carbon to the atmosphere. Primary productivity over large areas of the EEP is…”
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The Ediacaran-Cambrian transition in the Cantabrian Zone (northern Spain); sub-Cambrian weathering, K-metasomatism and provenance of detrital series by Ugidos, J. M, Barba, P, Valladares, M. I, Suárez, M, Ellam, R. M

“…The Upper Ediacaran detrital succession in the Cantabrian Zone shows geochemical and mineralogical changes resulting from sub-Cambrian weathering during the…”
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Fluid flow reconstruction in karstified Panormide platform limestones (north-central Sicily): Implications for hydrocarbon prospectivity in the Sicilian fold and thrust belt by Dewever, B., Berwouts, I., Swennen, R., Breesch, L., Ellam, R.M.

“…Diagenetic analysis based on field and petrographic observations, isotope and microthermometric data was used to reconstruct the fluid flow history of the…”
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Variability in the El Niño-Southern Oscillation through a Glacial-Interglacial Cycle by Tudhope, Alexander W., Chilcott, Colin P., McCulloch, Malcolm T., Cook, Edward R., Chappell, John, Ellam, Robert M., Lea, David W., Lough, Janice M., Shimmield, Graham B.

“…The El Niño-Southern Oscillation (ENSO) is the most potent source of interannual climate variability. Uncertainty surrounding the impact of greenhouse warming…”
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New constraints on the petrogenesis of the Nuanetsi picrite basalts from Pb and Hf isotope data by Ellam, R.M.

“…Previous studies established strong linear correlations between 143Nd/ 144Nd and a variety of incompatible element abundances and inter-element ratios for a…”
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Helium–strontium isotope constraints on mantle evolution beneath the Roman Comagmatic Province, Italy by Martelli, M., Nuccio, P.M., Stuart, F.M., Burgess, R., Ellam, R.M., Italiano, F.

“…A study of the He isotopic ratios of fluid inclusions in olivine and pyroxene from the Roman Comagmatic Province (RCP), Italy, is presented together with 87Sr/…”
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The composition of the continental river weathering flux deduced from seawater Mg isotopes by de Villiers, S., Dickson, J.A.D., Ellam, R.M.

“…This study establishes the magnesium isotopic composition of seawater and evaluates its constancy as a function of depth and geographic location. It also…”
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Long-term memory of subduction processes in the lithospheric mantle; evidence from the geochemistry of basic dykes in the Gardar Province of South Greenland by Goodenough, K. M, Upton, B. G. J, Ellam, R. M

“…The rift-related magmas of the Proterozoic Gardar Igneous Province were emplaced across the contact between the South Greenland Archaean craton and the…”
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Bimodal magmatism produced by progressively inhibited crustal assimilation by Meade, F. C., Troll, V. R., Ellam, R. M., Freda, C., Font, L., Donaldson, C. H., Klonowska, I.

“…The origin of bimodal (mafic–felsic) rock suites is a fundamental question in volcanology. Here we use major and trace elements, high-resolution Sr, Nd and Pb…”
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Rift relocation — A geochemical and geochronological investigation of a palaeo-rift in northwest Iceland by Hardarson, B.S., Fitton, J.G., Ellam, R.M., Pringle, M.S.

“…A dominant process in the evolution of Iceland is the repeated eastward relocation of the spreading axis in response to westward migration of the plate…”
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Distinguishing climatic and tectonic signals in the sedimentary successions of marginal basins using Sr isotopes; an example from the Messinian salinity crisis, eastern Mediterranean by Flecker, R, Ellam, R. M

“…The evolution of oceanic 87Sr/86Sr through the Tertiary has been sufficiently well documented to provide a useful stratigraphic tool for carbonate-rich marine…”
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Evidence from Re-Os isotopes for plume-lithosphere mixing in Karoo flood basalt genesis by Ellam, R. M, Carlson, R. W, Shirey, S. B

“…Osmium ratios for 190-million-year-old picrite basalts from the Nuanetsi region of the Karoo flood basalt province, which are most readily explained as…”
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Identifying Late Miocene episodes of connection and isolation in the Mediterranean–Paratethyan realm using Sr isotopes by Flecker, R., Ellam, R.M.

“…After decades of research, the timing and nature of Late Miocene connections between the Mediterranean, Paratethys and the global ocean are still speculative…”
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Crustal Differentiation Processes at Krakatau Volcano, Indonesia by Gardner, M. F., Troll, V. R., Gamble, J. A., Gertisser, R., Hart, G. L., Ellam, R. M., Harris, C., Wolff, J. A.

“…Anak Krakatau is a basaltic andesite cone that has grown following the famous caldera-forming 1883 eruption of Krakatau. It breached sea level in 1927 and…”
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The Sub-lithospheric Source of North Atlantic Basalts: Evidence for, and Significance of, a Common End-member by Ellam, R M, Stuart, F M

“…Palaeogene basalts from the margins of the North Atlantic often show geochemical variations that are consistent with their parental magmas having interacted…”
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Elemental and isotopic variations in subduction related basalts: evidence for a three component model by ELLAM, R. M, HAWKESWORTH, C. J

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Precessional Cyclicity of Seawater Pb Isotopes in the Late Miocene Mediterranean by Modestou, S. E., Gutjahr, M., Schee, M., Ellam, R. M., Flecker, R.

“…Astronomical tuning in the Mediterranean region is primarily based on organically‐mediated proxies, such as cyclicity of organic rich layers or changes in…”
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Magmatic evolution of the Cadamosto Seamount, Cape Verde: beyond the spatial extent of EM1 by Barker, A. K., Troll, V. R., Ellam, R. M., Hansteen, T. H., Harris, C., Stillman, C. J., Andersson, A.

“…The Cadamosto Seamount is an unusual volcanic centre from Cape Verde, characterised by dominantly evolved volcanics, in contrast to the typically mafic…”
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