Search Results - "Thirlwall, M.F"

Multidynamic isotope ratio analysis using MC–ICP–MS and the causes of secular drift in Hf, Nd and Pb isotope ratios by Thirlwall, M.F., Anczkiewicz, R.

“…The causes of secular drift in multicollector (MC)–ICP–MS normalized isotope ratios were investigated using multidynamic measurements of Nd, Yb, Hf and Pb…”
Get full text

Palaeotemperatures, polar ice-volume, and isotope stratigraphy (Mg/Ca, δ 18O, δ 13C, 87Sr/ 86Sr): The Early Cretaceous (Berriasian, Valanginian, Hauterivian) by McArthur, J.M., Janssen, N.M.M., Reboulet, S., Leng, M.J., Thirlwall, M.F., van de Schootbrugge, B.

“…Temporal trends through Early Cretaceous time of δ 13C, δ 18O, Mg/Ca, and 87Sr/ 86Sr in calcite, and δ 18O in seawater, are discussed using belemnites from SE…”
Get full text

Paleoceanographic changes of the Late Pliensbachian–Early Toarcian interval: a possible link to the genesis of an Oceanic Anoxic Event by Bailey, T.R., Rosenthal, Y., McArthur, J.M., van de Schootbrugge, B., Thirlwall, M.F.

“…Secular records of the elemental and isotopic composition of belemnite calcite were studied in Pliensbachian and Toarcian sections from the Yorkshire coast,…”
Get full text

Petrogenetic evolution of late Cenozoic, post-collision volcanism in western Anatolia, Turkey by ALDANMAZ, E, PEARCE, J. A, THIRLWALL, M. F, MITCHELL, J. G

Get full text

Mantle components in Iceland and adjacent ridges investigated using double-spike Pb isotope ratios by Thirlwall, M.F., Gee, M.A.M., Taylor, R.N., Murton, B.J.

“…High precision Sr-Nd isotope ratios together with Pb isotope ratios corrected for mass fractionation using a double spike are reported for an extensive suite…”
Get full text

Strontium isotope profile of the early Toarcian (Jurassic) oceanic anoxic event, the duration of ammonite biozones, and belemnite palaeotemperatures by McArthur, J.M., Donovan, D.T, Thirlwall, M.F., Fouke, B.W., Mattey, D.

“…We profile 87Sr/ 86Sr, δ 13C, δ 18O, Sr/Ca, Mg/Ca, and Na/Ca in belemnites through Pliensbachian and Toarcian strata on the Yorkshire coast, UK, which include…”
Get full text

Belemnites of Valanginian, Hauterivian and Barremian age: Sr-isotope stratigraphy, composition ( 87Sr/ 86Sr, δ 13C, δ 18O, Na, Sr, Mg), and palaeo-oceanography by McArthur, J.M, Mutterlose, J, Price, G.D, Rawson, P.F, Ruffell, A, Thirlwall, M.F

“…We present new data on 87Sr/ 86Sr, δ 13C and δ 18O, and elemental compositions of belemnites from 85 m of Valanginian, Hauterivian and Barremian strata at…”
Get full text

Dissolution methods for strontium isotope stratigraphy: whole rock analysis by Bailey, T.R., McArthur, J.M., Prince, H., Thirlwall, M.F.

“…The preparation of samples for strontium isotope stratigraphy (SIS) by whole rock dissolution results in contributions of Sr from contaminant phases as well as…”
Get full text

Multicollector ICP-MS analysis of Pb isotopes using a 207pb- 204pb double spike demonstrates up to 400 ppm/amu systematic errors in Tl-normalization by Thirlwall, M.F

“…Pb isotope analyses using multicollector magnetic sector inductively coupled plasma mass spectrometers (ICP-MS) may potentially be corrected for mass bias, a…”
Get full text

Mantle domains in the lithosphere beneath the French Massif Central: trace element and isotopic evidence from mantle clinopyroxenes by Downes, H, Reichow, M.K, Mason, P.R.D, Beard, A.D, Thirlwall, M.F

“…Lenoir et al. [Earth Planet. Sci. Lett. 181 (2000) 359] have suggested the existence of a lithospheric domain boundary at approximately 45°30′N within the…”
Get full text

SrNdPb isotopic and trace element evidence for crustal contamination of plume-derived flood basalts: Oligocene flood volcanism in western Yemen by Baker, J.A., Thirlwall, M.F., Menzies, M.A.

“…Oligocene flood basalts from western Yemen have a relatively limited range in initial isotopic composition compared with other continental flood basalts: 87 Sr…”
Get full text

Low δ18O in the Icelandic mantle and its origins: Evidence from Reykjanes Ridge and Icelandic lavas by Thirlwall, M.F., Gee, M.A.M., Lowry, D., Mattey, D.P., Murton, B.J., Taylor, R.N.

Get full text

Isotopic constraints on the influence of the Icelandic plume by Taylor, Rex N., Thirlwall, M.F., Murton, B.J., Hilton, D.R., Gee, M.A.M.

“…Thermally buoyant mantle, in the form of a plume, rises beneath Iceland creating a major topographic anomaly along the Mid-Atlantic Ridge and in the…”
Get full text

Crustal interaction during construction of ocean islands: PbSrNdO isotope geochemistry of the shield basalts of Gran Canaria, Canary Islands by Thirlwall, M.F., Jenkins, C., Vroon, P.Z., Mattey, D.P.

“…The isotopic compositions of ocean island basalts are usually taken to reflect the compositions of their mantle sources. We report PbSrNdO isotopic data for…”
Get full text

Geochemical constraints on the genesis of Hercynian two-mica leucogranites from the Massif Central, France by Williamson, B.J., Shaw, A., Downes, H., Thirlwall, M.F.

“…Late Hercynian two-mica leucogranites dated at 340-280 3a old occur across the entire Massif Central, France, and form dykes and stocks up to 130 km in length…”
Get full text

Testing for ocean acidification during the Early Toarcian using δ44/40Ca and δ88/86Sr by Li, Q., McArthur, J.M., Thirlwall, M.F., Turchyn, A.V., Page, K., Bradbury, H.J., Weis, R., Lowry, D.

“…During the Early Toarcian, volcanic gases released by the Karoo-Ferrar large igneous province are widely believed to have caused severe environmental…”
Get full text

Glacioisostacy controls chemical and isotopic characteristics of tholeiites from the Reykjanes Peninsula, SW Iceland by Gee, M.A.Mary, Taylor, R.N., Thirlwall, M.F., Murton, B.J.

“…We present chemical and isotopic data from Reykjanes Peninsula rift zone tholeiites which show dramatic changes during the past 20 kyr, effectively defining…”
Get full text

Geochemistry of metasomatism adjacent to amphibole-bearing veins in the Lherz peridotite massif by McPherson, E., Thirlwall, M.F., Parkinson, I.J., Menzies, M.A., Bodinier, J.L., Woodland, A., Bussod, G.

“…The Lherz peridotite massif, in the French Pyrenees, is intruded by a number of hornblendite and garnet-amphibole-pyroxenite (GAP) veins. New, high quality,…”
Get full text

Petrogenesis of Quaternary Intraplate Volcanism, Sana'a, Yemen: Implications for Plume-Lithosphere Interaction and Polybaric Melt Hybridization by Baker, J.A., Menzies, M.A., Thirlwall, M.F., MacPherson, C.G.

“…Quaternary intraplate volcanism near Sana'a, western Yemen, produced a chemically and isotopically diverse volcanic field. The predominantly mafic samples…”
Get full text

Sr, Nd al36 (1997) 99–122 Hercynian granodiorites and monzogranites, Massif Central, France by Downes, H., Shaw, A., Williamson, B.J., Thirlwall, M.F.

“…Variations in Sr Nd and Pb initial isotope ratios of three large Hercynian granitoid massifs of the French Massif Central are consistent with formation of the…”
Get full text