Search Results - "Greenwood, R.C."

Oxygen isotope variation in primitive achondrites: The influence of primordial, asteroidal and terrestrial processes by Greenwood, R.C., Franchi, I.A., Gibson, J.M., Benedix, G.K.

“…A detailed oxygen isotope study of the acapulcoites, lodranites, winonaites, brachinites and various related achondrites has been undertaken to investigate the…”
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The relationship between CK and CV chondrites by Greenwood, R.C., Franchi, I.A., Kearsley, A.T., Alard, O.

“…CK chondrites are highly oxidized meteorites containing abundant magnetite and trace amounts of Fe,Ni metal. Although the group is predominately composed of…”
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The origin of aubrites: Evidence from lithophile trace element abundances and oxygen isotope compositions by Barrat, J.A., Greenwood, R.C., Keil, K., Rouget, M.L., Boesenberg, J.S., Zanda, B., Franchi, I.A.

“…We report the abundances of a selected set of “lithophile” trace elements (including lanthanides, actinides and high field strength elements) and…”
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An ancient reservoir of volatiles in the Moon sampled by lunar meteorite Northwest Africa 10989 by Stephant, A., Anand, M., Ashcroft, H.O., Zhao, X., Hu, S., Korotev, R.L., Strekopytov, S., Greenwood, R.C., Humphreys-Williams, E., Liu, Y., Tang, G., Li, Q., Franchi, I.A.

“…Northwest Africa (NWA) 10989 is a recently found lunar meteorite we used to elucidate the history of volatiles (H and Cl) in the Moon through analysis of its…”
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Crustal differentiation in the early solar system: Clues from the unique achondrite Northwest Africa 7325 (NWA 7325) by Barrat, J.A., Greenwood, R.C., Verchovsky, A.B., Gillet, Ph, Bollinger, C., Langlade, J.A., Liorzou, C., Franchi, I.A.

“…The unique achondrite NWA 7325 is an unusual olivine gabbro composed chiefly of calcic plagioclase (An85–93), diopsidic pyroxene (En50.1–54.0 Wo44.8–49.3…”
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Oxygen three-isotope fractionation lines in terrestrial silicate minerals: An inter-laboratory comparison of hydrothermal quartz and eclogitic garnet by Rumble, D., Miller, M.F., Franchi, I.A., Greenwood, R.C.

“…Geochemical—and perhaps biochemical—processes may yield tell-tale proxies in rocks and minerals on the Earth or other planetary bodies, in the form of…”
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The Stannern trend eucrites: Contamination of main group eucritic magmas by crustal partial melts by Barrat, J.A., Yamaguchi, A., Greenwood, R.C., Bohn, M., Cotten, J., Benoit, M., Franchi, I.A.

“…We report on the petrology of a new eucrite belonging to the Stannern trend and discuss the origin of this trend. The eucrite Northwest Africa 4523 (NWA 4523)…”
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Triple oxygen isotopic composition of the high-3He/4He mantle by Starkey, N.A., Jackson, C.R.M., Greenwood, R.C., Parman, S., Franchi, I.A., Jackson, M., Fitton, J.G., Stuart, F.M., Kurz, M., Larsen, L.M.

“…Measurements of Xe isotope ratios in ocean island basalts (OIB) suggest that Earth’s mantle accreted heterogeneously, and that compositional remnants of…”
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Oxygen Isotope Variation in Stony-Iron Meteorites by Greenwood, R.C, Franchi, I.A, Jambon, A, Barrat, J.A, Burbine, T.H

“…Asteroidal material, delivered to Earth as meteorites, preserves a record of the earliest stages of planetary formation. High-precision oxygen isotope analyses…”
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The petrology and geochemistry of Miller Range 05035: A new lunar gabbroic meteorite by Joy, K.H., Crawford, I.A., Anand, M., Greenwood, R.C., Franchi, I.A., Russell, S.S.

“…Miller Range (MIL) 05035 is a lunar gabbroic meteorite. The mineralogy, Fe/Mn ratios in olivine and pyroxene, bulk-rock chemical composition and the bulk…”
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Petrography and geochemistry of the chassignite Northwest Africa 2737 (NWA 2737) by Beck, P., Barrat, J.A., Gillet, Ph, Wadhwa, M., Franchi, I.A., Greenwood, R.C., Bohn, M., Cotten, J., van de Moortèle, B., Reynard, B.

“…We report on the petrology and geochemistry of the Northwest Africa 2737 (NWA 2737) meteorite that was recovered from the Morrocan Sahara in 2000. It is the…”
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A novel approach for the rapid decomposition of Actinide™ resin and its application to measurement of uranium and plutonium in natural waters by Croudace, I.W., Warwick, P.E., Greenwood, R.C.

“…A rapid and robust procedure is described for the decomposition of Actinide™ resin permitting the routine application of this resin as a preconcentrator…”
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An Isotopic and Petrologic Study of Calcium-Aluminum-Rich Inclusions from CO3 Meteorites by Russell, S.S., Huss, G.R., Fahey, A.J., Greenwood, R.C., Hutchison, R., Wasserburg, G.J.

“…We have studied the mineralogy and petrology of 229 calcium-aluminum-rich inclusions (CAIs) from ten CO3 meteorites of petrologic types 3.0–3.7. Subsets of…”
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A mutli-technique search for the most primitive CO chondrites by Alexander, C.M.O'D., Greenwood, R.C., Bowden, R., Gibson, J.M., Howard, K.T., Franchi, I.A.

“…As part of a study to identify the most primitive COs and to look for weakly altered CMs amongst the COs, we have conducted a multi-technique study of 16…”
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Asteroids accretion, differentiation, and break-up in the Vesta source region: Evidence from cosmochemistry of mesosiderites by Iannini Lelarge, S., Folco, L., Masotta, M., Greenwood, R.C., Russell, S.S., Bates, H.C.

“…The cosmochemistry of meteorites provides unique clues on asteroids accretion, differentiation, collisional break-up and reassembly - processes of critical…”
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Evidence against water delivery by impacts within 10 million years of planetesimal formation by Rider-Stokes, B.G., Stephant, A., Anand, M., Franchi, I.A., Zhao, X., White, L.F., Yamaguchi, A., Greenwood, R.C., Jackson, S.L.

“…•The angrite parent body (APB) was one of the most hydrated differentiated bodies in the early inner solar system.•No evidence of impacts adding to the H2O…”
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Isotopic and textural analysis of giant unmelted micrometeorites – identification of new material from intensely altered 16O-poor water-rich asteroids by Suttle, M.D., Dionnet, Z., Franchi, I., Folco, L., Gibson, J., Greenwood, R.C., Rotundi, A., King, A., Russell, S.S.

“…•Micro-CT and O-isotopes identify the parent bodies of giant unmelted micrometeorites.•Discovery new hydrated carbonaceous chondrite group linked to water-rich…”
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Investigating magmatic processes in the early Solar System using the Cl isotopic systematics of eucrites by Barrett, T.J., Barnes, J.J., Anand, M., Franchi, I.A., Greenwood, R.C., Charlier, B.L.A., Zhao, X., Moynier, F., Grady, M.M.

“…Generally, terrestrial rocks, martian and chondritic meteorites exhibit a relatively narrow range in bulk and apatite Cl isotope compositions, with δ37Cl (per…”
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Terrestrial alteration mineral assemblages in the NWA 10416 olivine phyric shergottite by Piercy, J.D., Bridges, J.C., Hicks, L.J., MacArthur, J.L., Greenwood, R.C., Franchi, I.A.

“…We report on the alteration history of the olivine-phyric, highly depleted (HD) shergottite, Northwest Africa (NWA) 10416, paying particular attention to the…”
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Late Accretion on the Earliest Planetesimals Revealed by the Highly Siderophile Elements by Dale, Christopher W., Burton, Kevin W., Greenwood, Richard C., Gannoun, Abdelmouhcine, Wade, Jonathan, Wood, Bernard J., Pearson, D. Graham

“…Late accretion of primitive chondritic material to Earth, the Moon, and Mars, after core formation had ceased, can account for the absolute and relative…”
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