Extreme platinum-group element fractionation and variable Os isotope compositions in Philippine Sea Plate basalts: Tracing mantle source heterogeneity

Dale, C.W.; Luguet, A.; Macpherson, C.G.; Pearson, D.G.; Hickey-Vargas, R.

doi:10.1016/j.chemgeo.2007.11.007

The behavior of iron and zinc stable isotopes accompanying the subduction of mafic oceanic crust: A case study from Western Alpine ophiolites (2017)
Journal Article
Inglis, E. C., Debret, B., Burton, K. W., Millet, M., Pons, M., Dale, C. W., …Williams, H. M. (2017). The behavior of iron and zinc stable isotopes accompanying the subduction of mafic oceanic crust: A case study from Western Alpine ophiolites. Geochemistry, Geophysics, Geosystems, 18(7), 2562-2579. https://doi.org/10.1002/2016gc006735

Arc lavas display elevated Fe3+/ΣFe ratios relative to MORB. One mechanism to explain this is the mobilization and transfer of oxidised or oxidising components from the subducting slab to the mantle wedge. Here we use iron and zinc isotopes, which ar... Read More about The behavior of iron and zinc stable isotopes accompanying the subduction of mafic oceanic crust: A case study from Western Alpine ophiolites.

High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS (2017)
Journal Article
Nanne, J., Millet, M., Burton, K., Dale, C., Nowell, G., & Williams, H. (2017). High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS. Journal of Analytical Atomic Spectrometry, 32(4), 749-765. https://doi.org/10.1039/c6ja00406g

Osmium stable isotopes provide a new, potentially powerful tool with which to investigate a diverse range of geological processes including planetary formation, ore-genesis and weathering. In this paper, we present a new technique for high precision... Read More about High precision osmium stable isotope measurements by double spike MC-ICP-MS and N-TIMS.

Highly siderophile element and 182W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland (2016)
Journal Article
Dale, C., Kruijer, T., & Burton, K. (2017). Highly siderophile element and 182W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland. Earth and Planetary Science Letters, 458, 394-404. https://doi.org/10.1016/j.epsl.2016.11.001

The higher-than-expected concentrations of highly siderophile elements (HSE) in Earth's mantle most likely indicate that Earth received a small amount of late accreted mass after core formation had ceased, known as the ‘late veneer’. Small 182W exces... Read More about Highly siderophile element and 182W evidence for a partial late veneer in the source of 3.8 Ga rocks from Isua, Greenland.

Osmium isotope compositions of detrital Os-rich alloys from the Rhine River provide evidence for a global late Mesoproterozoic mantle depletion event (2016)
Journal Article
Dijkstra, A., Dale, C., Oberthür, T., Nowell, G., & Pearson, D. (2016). Osmium isotope compositions of detrital Os-rich alloys from the Rhine River provide evidence for a global late Mesoproterozoic mantle depletion event. Earth and Planetary Science Letters, 452, 115-122. https://doi.org/10.1016/j.epsl.2016.07.047

We report osmium isotopic compositions for 297 mantle-derived detrital Ru–Os–Ir alloy grains found in gold and platinum-group mineral bearing placers of the Rhine River. These alloys were likely formed as a result of high degree melting in the convec... Read More about Osmium isotope compositions of detrital Os-rich alloys from the Rhine River provide evidence for a global late Mesoproterozoic mantle depletion event.

Titanium stable isotope investigation of magmatic processes on the Earth and Moon (2016)
Journal Article
Millet, M., Dauphas, N., Greberb, N., Burton, K., Dale, C., Debret, B., …Williams, H. (2016). Titanium stable isotope investigation of magmatic processes on the Earth and Moon. Earth and Planetary Science Letters, 449, 197-205. https://doi.org/10.1016/j.epsl.2016.05.039

We present titanium stable isotope measurements of terrestrial magmatic samples and lunar mare basalts with the aims of constraining the composition of the lunar and terrestrial mantles and evaluating the potential of Ti stable isotopes for understan... Read More about Titanium stable isotope investigation of magmatic processes on the Earth and Moon.

Mantle flow, volatiles, slab-surface temperatures and melting dynamics in the north Tonga arc – Lau back-arc basin (2012)
Journal Article
Caulfield, J., Turner, S., Arculus, R., Dale, C., Jenner, F., Pearce, J., …Handley, H. (2012). Mantle flow, volatiles, slab-surface temperatures and melting dynamics in the north Tonga arc – Lau back-arc basin. Journal of Geophysical Research, 117, https://doi.org/10.1029/2012jb009526

Community differentiation and kinship among Europe's first farmers (2012)
Journal Article
Bentley, R., Bickle, P., Fibiger, L., Nowell, G., Dale, C., Hedges, R., …Whittle, A. (2012). Community differentiation and kinship among Europe's first farmers. Proceedings of the National Academy of Sciences, 109(24), 9326-9330. https://doi.org/10.1073/pnas.1113710109

Community differentiation is a fundamental topic of the social sciences, and its prehistoric origins in Europe are typically assumed to lie among the complex, densely populated societies that developed millennia after their Neolithic predecessors. He... Read More about Community differentiation and kinship among Europe's first farmers.

Late accretion on the earliest planetesimals revealed by the highly siderophile elements (2012)
Journal Article
Dale, C., Burton, K., Greenwood, R., Gannoun, A., Wade, J., Wood, B., & Pearson, D. (2012). Late accretion on the earliest planetesimals revealed by the highly siderophile elements. Science, 336(6077), 72-75. https://doi.org/10.1126/science.1214967

Late accretion of primitive chondritic material to Earth, the Moon, and Mars, after core formation had ceased, can account for the absolute and relative abundances of highly siderophile elements (HSEs) in their silicate mantles. Here we show that sma... Read More about Late accretion on the earliest planetesimals revealed by the highly siderophile elements.

Formation of the North Atlantic Craton: Timing and mechanisms constrained from Re-Os isotope and PGE data of peridotite xenoliths from SW Greenland (2010)
Journal Article
Wittig, N., Webb, M., Pearson, D., Dale, C., Ottley, C., Hutchison, M., …Luguet, A. (2010). Formation of the North Atlantic Craton: Timing and mechanisms constrained from Re-Os isotope and PGE data of peridotite xenoliths from SW Greenland. Chemical Geology, 276(3-4), 166-187. https://doi.org/10.1016/j.chemgeo.2010.06.002

Highly siderophile element behaviour accompanying subduction of oceanic crust: Whole rock and mineral-scale insights from a high-pressure terrain (2009)
Journal Article
Dale, C., Burton, K., Pearson, D., Gannoun, A., Alard, O., Argles, T., & Parkinson, I. (2009). Highly siderophile element behaviour accompanying subduction of oceanic crust: Whole rock and mineral-scale insights from a high-pressure terrain. Geochimica et Cosmochimica Acta, 73(5), 1394-1416. https://doi.org/10.1016/j.gca.2008.11.036

Highly siderophile element concentrations (HSE: Re and platinum-group elements (PGE)) are presented for gabbros, gabbroic eclogites and basaltic eclogites from the high-pressure Zermatt–Saas ophiolite terrain, Switzerland. Rhenium and PGE (Os, Ir, Ru... Read More about Highly siderophile element behaviour accompanying subduction of oceanic crust: Whole rock and mineral-scale insights from a high-pressure terrain.

Extreme platinum-group element fractionation and variable Os isotope compositions in Philippine Sea Plate basalts: Tracing mantle source heterogeneity (2008)
Journal Article
Dale, C., Luguet, A., Macpherson, C., Pearson, D., & Hickey-Vargas, R. (2008). Extreme platinum-group element fractionation and variable Os isotope compositions in Philippine Sea Plate basalts: Tracing mantle source heterogeneity. https://doi.org/10.1016/j.chemgeo.2007.11.007

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