Wilson, Rebecca, Pearson, Victoria, Morgan, Geraint, Franchi, Ian, Turner, D. C., Wright, Ian, ...
We present the results of a new simulation of the atmospheric entry heating experienced by extraterrestrial dust particles, quantifying their volatile loss into the early Earth atmosphere and...
Comet 81P/Wild 2 Under a Microscope (2006)
Brownlee, Don, Tsou, Peter, Aléon, Jérôme, Alexander, Conel M O'D, Araki, Tohru, Bajt, Sasa, ...
The Stardust spacecraft collected thousands of particles from comet 81P/Wild 2 and returned them to Earth for laboratory study. The preliminary examination of these samples shows that the nonvolatile...
Pearson, Victoria, Sephton, M.A., Franchi, Ian, Gibson, Jennifer, Gilmour, Iain
We have undertaken a comprehensive study of carbon and nitrogen elemental abundances and isotopic compositions of bulk carbonaceous chondrites. A strategy of multiple analyses has enabled the...
Petrology and geochemistry of the fine-grained, unbrecciated diogenite Northwest Africa 4215 (2006)
Barrat, J. A., Beck, P., Bohn, M., Cotten, J., Gillet, P., Greenwood, R. C., ...
We report on the petrology and geochemistry of Northwest Africa (NWA) 4215, an unbrecciated diogenite recovered in the Sahara. This single stone, weighing 46.4 g, displays a well-preserved cumulative...
A new CH carbonaceous chondrite from Acfer, Algeria (2006)
Moggi-Cecchi, V., Salvadori, A., Pratesi, G., Franchi, Ian, Greenwood, Richard
A single stone weighing 1456 g was found in November 2002 in the Acfer area, Algeria. Oxygen isotope, chondrules-matrix ratio as well as other petrographic features point to a classification as CH...
High-temperature chemical processing on asteroids: An oxygen isotope perspective (2005)
Greenwood, Richard, Franchi, Ian
From the introduction: Small planetary bodies accreted within 2.4 Myr of solar system formation [1]. The primitive materials (CAIs, chondrules, matrix) incorporated into these asteroids were altered...
The Genesis solar-wind collector materials (2003)
Jurewicz, A.J.G., Burnett, D.S., Wiens, R.C., Friedmann, T.A., Hays, C.C., Hohlfelder, R.J., ...
Genesis (NASA Discovery Mission #5) is a sample return mission. Collectors comprised of ultra-high purity materials will be exposed to the solar wind and then returned to Earth for laboratory...
Patzer, A., Hill, D. H., Boynton, W. V., Franke, L., Schultz, L., Jull, A. J. T., ...
We report noble gas, oxygen isotope, 14C and 10Be data of Itqiy as well as noble gas, 14C and 10Be results for Zaklodzie. Both samples have been recently classified as anomalous enstatite meteorites...
Noble gases in Tagish Lake (2001)
Grady, Monica, Verchovsky, Sasha, Franchi, Ian, Wright, Ian, Pillinger, Colin
From the introduction: Tagish Lake has been classified as a CI2 chondrite [1] with an interstellar grain abundance enhanced over that of CI1 and CM2 chondrites [2]. Noble gases have been used as...
Ureilite Graphite: Shocking implications (2001)
Smith, C. L., Franchi, Ian, Wright, Ian, Grady, Monica, Pillinger, Colin
Itqiy: II. a short story about its noble gases and oxygen isotopes (2001)
Patzer, A., Hill, D. H., Boynton, W. V., Franke, L., Schultz, L., Franchi, Ian
The oxygen isotopic composition of water extracted from carbonaceous chondrites (2001)
Baker, L., Franchi, Ian, Wright, Ian, Pillinger, Colin
The oxygen isotopic composition of water from carbonaceous chondrites suggests that close to isotopic equilibrium was attained on CI and CM parent bodies. This is more consistent with a closed system...
Smith, C. L., Franchi, Ian, Wright, Ian, Verchovsky, Sasha, Grady, Monica, Pillinger, Colin
New ureilite Sahara 99201 has been investigated to determine mineralogy, petrography, light stable isotopes and noble gases. The sample is a typical olivine pigeonite ureilite (Fo 78, Wo 10, En 72)....
New data on carbon isotopic compositions of some ureilites (2001)
Smith,, C. L., Franchi, Ian, Wright, Ian, Grady, Monica, Pillinger, Colin
We have collected new C data from high resolution stepped combustion analyses of 5 ureilites to better constrain their relationships with O and mineralogical/petrographic groupings. This may help the...
Baker, Lee, Franchi, Ian, Bland, P. A., Wright, Ian, Pillinger, Colin
Analysis of oxygen isotopes in water from Tagish Lake together with Mössbauer Spectroscopy suggest some similarities to the CI group of meteorites but also suggest differences in the extent of...