Ca ISOTOPE EFFECTS IN ORGUEIL LEACHATES AND THE IMPLICATIONS FOR THE CARRIER PHASES OF {sup 54}Cr ANOMALIES

Journal Article · Tue Jul 20 00:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/718/1/L7· OSTI ID:21486864

Moynier, Frederic; Podosek, Frank A; Brannon, Joyce ^[1]; Simon, Justin I; DePaolo, Donald J ^[2]

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1. Earth and Planetary Sciences and McDonnell Center for the Space Sciences, Washington University in St Louis, One Brookings Drive, St Louis, MO 63130 (United States)
2. Center for Isotope Geochemistry, Department of Earth and Planetary Science, University of California, Berkeley, CA 94720 (United States)

Primitive meteorites contain small {sup 40}Ca excesses, in addition to rare anomalies in {sup 48}Ca. Refractory inclusions from Vigarano and Allende have larger {sup 40}Ca and resolvable {sup 48}Ca anomalies. These results imply that Ca isotopic heterogeneities were still present in the early solar system at both the mineral and whole-rock scale. The absence of correlated Ca isotope anomalies in leachates from the CI1 chondrite Orgueil containing large {sup 54}Cr anomalies has implications on the origin of the Cr anomalies. {sup 54}Cr has to be produced either in massive stars during s-process nucleosynthesis without accompanying {sup 48}Ca or in particular zones in the rare Type Ia supernovae. In the latter case, {sup 54}Cr has been produced in a zone predominantly enriched in Cr and {sup 54}Cr and not mixed with other zones, or {sup 54}Cr has been produced together with other neutron-rich nuclides and there has been subsequent decoupling of this material in the star, in the solar system, or in the laboratory.

• OSTI ID: 21486864
• Journal Information: Astrophysical Journal Letters, Vol. 718, Issue 1; Other Information: DOI: 10.1088/2041-8205/718/1/L7; ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
CALCIUM 40
CALCIUM 48
CHROMIUM 54
NEUTRONS
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
PROTOPLANETS
S PROCESS
SOLAR SYSTEM
SUPERNOVAE
ALKALINE EARTH ISOTOPES
BARYONS
BINARY STARS
CALCIUM ISOTOPES
CHROMIUM ISOTOPES
ELEMENTARY PARTICLES
ERUPTIVE VARIABLE STARS
EVEN-EVEN NUCLEI
EVOLUTION
FERMIONS
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIGHT NUCLEI
NUCLEI
NUCLEONS
STABLE ISOTOPES
STAR EVOLUTION
STARS
SYNTHESIS
VARIABLE STARS