TY - JOUR
T1 - Partial melting of the allende (CV3) meteorite
T2 - Implications for origins of basaltic meteorites
AU - Jurewicz, A. J.G.
AU - Mittlefehldt, D. W.
AU - Jones, J. H.
PY - 1991/1/1
Y1 - 1991/1/1
N2 - Eucrites and angrites are distinct types of basaltic meteorites whose origins are poorly known. Experiments in which samples of the Allende (CV3) carbonaceous chondrite were partially melted indicate that partial melts can resemble either eucrites or angrites, depending only on the oxygen fugacity (fO2). Melts are eucritic if the fO2 is below that of the iron-wüstite buffer or angritic if above the fO2 of that buffer. With changing pressure, the graphite-oxygen redox reaction can produce oxygen fugacities that are above or below those of the iron-wüstite buffer. Therefore, a single, homogeneous, carbonaceous planetoid > 110 kilometers in radius could produce melts of drastically different composition, depending on the depth of melting.
AB - Eucrites and angrites are distinct types of basaltic meteorites whose origins are poorly known. Experiments in which samples of the Allende (CV3) carbonaceous chondrite were partially melted indicate that partial melts can resemble either eucrites or angrites, depending only on the oxygen fugacity (fO2). Melts are eucritic if the fO2 is below that of the iron-wüstite buffer or angritic if above the fO2 of that buffer. With changing pressure, the graphite-oxygen redox reaction can produce oxygen fugacities that are above or below those of the iron-wüstite buffer. Therefore, a single, homogeneous, carbonaceous planetoid > 110 kilometers in radius could produce melts of drastically different composition, depending on the depth of melting.
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U2 - 10.1126/science.252.5006.695
DO - 10.1126/science.252.5006.695
M3 - Article
C2 - 17746669
AN - SCOPUS:0026012677
VL - 252
SP - 695
EP - 698
JO - Science
JF - Science
SN - 0036-8075
IS - 5006
ER -