scholarly journals Oxygen isotope and petrological study of silicate inclusions in IIE iron meteorites and their relationship with H chondrites

2016 ◽  
Vol 173 ◽  
pp. 97-113 ◽  
Author(s):  
Kathryn H. McDermott ◽  
Richard C. Greenwood ◽  
Edward R.D. Scott ◽  
Ian A. Franchi ◽  
Mahesh Anand
Keyword(s):  
Oxygen Isotope ◽  
Iron Meteorites ◽  
Silicate Inclusions ◽  
H Chondrites

Oxygen Isotope Ratios in the Crust of Iron Meteorites

1971 ◽  
Vol 26 (9) ◽  
pp. 1485-1490 ◽  
Author(s):  
K. Heinzinger ◽  
C. Iunge ◽  
M. Schidlowski
Keyword(s):  
Oxygen Isotope ◽  
Isotope Ratio ◽  
Atmospheric Oxygen ◽  
Isotope Ratios ◽  
Oxygen Isotope Ratio ◽  
Iron Meteorites ◽  
Oxygen Isotope Ratios ◽  
Cosmic Spherules ◽  
The Difference ◽  
Extraterrestrial Material

Abstract The separation factor, aM-0= (18O/16O) magnetite/' (18O/16O) atmospheric oxygen, between the magnetite crust of iron meteorites and atmospheric oxygen has been determined to be 0.9946 ± 0.0005. It is concluded that this fractionation of the oxygen isotopes is the consequence of an equilibrium isotope effect at high temperatures. It can be assumed that this is also valid for cosmic spherules, which are mainly ablation products of iron meteorites. As these spherules are found in sediments of different geological ages, their oxygen isotope ratio can give information on the development of atmospheric oxygen. The difference of the oxygen isotope ratios between magnetite from the lithosphere and airborne magnetite can be used to distinguish between terrestrial and extraterrestrial material.

Oxygen isotope relationships in iron meteorites

1983 ◽  
Vol 65 (2) ◽  
pp. 229-232 ◽  
Author(s):  
Robert N. Clayton ◽  
Toshiko K. Mayeda ◽  
Edward J. Olsen ◽  
Martin Prinz
Keyword(s):  
Oxygen Isotope ◽  
Iron Meteorites

87Rb-87Sr ages of silicate inclusions in iron meteorites

1967 ◽  
Vol 2 (5) ◽  
pp. 397-408 ◽  
Author(s):  
D.S. Burnett ◽  
G.J. Wasserburg
Keyword(s):  
Iron Meteorites ◽  
Silicate Inclusions

Uranium in the silicate inclusions of stony-iron and iron meteorites

1982 ◽  
Vol 46 (5) ◽  
pp. 749-754 ◽  
Author(s):  
Ghislaine Crozaz ◽  
Scott F. Sibley ◽  
Douglas R. Tasker
Keyword(s):  
Iron Meteorites ◽  
Silicate Inclusions

Ages of Silicate Inclusions in Iron Meteorites

1968 ◽  
pp. 399-409
Author(s):  
D.S. BURNETT ◽  
G.J. WASSERBURG ◽  
D.D. BOGARD ◽  
P. EBERHARDT
Keyword(s):  
Iron Meteorites ◽  
Silicate Inclusions

Oxygen Isotope Variation in Stony-Iron Meteorites

Science ◽  
2006 ◽  
Vol 313 (5794) ◽  
pp. 1763-1765 ◽  
Author(s):  
R. C. Greenwood
Keyword(s):  
Oxygen Isotope ◽  
Iron Meteorites ◽  
Isotope Variation

scholarly journals 9. Unusual Primitive Meteorites: Chondritic Inclusions from Group IAB Iron Meteorites

1977 ◽  
Vol 39 ◽  
pp. 397-402
Author(s):  
R. W. Bild
Keyword(s):  
Solar Nebula ◽  
Iron Meteorites ◽  
Silicate Inclusions ◽  
Additional Formation

Several meteorite types, distinct from the large chondrite groups (H, L, LL, E and carbonaceous), are known to also have chondritic compositions. These meteorites preserve information on conditions at additional formation locations in the early solar nebula. Silicate inclusions from group IAB iron meteorites are one such type. Evidence for their chondritic nature is given and their formation discussed.

scholarly journals 1. The Origin of Iron Meteorites

1977 ◽  
Vol 39 ◽  
pp. 405-413
Author(s):  
W. R. Kelly ◽  
E. R. Rambaldi ◽  
J. W. Larimer
Keyword(s):  
Melting Process ◽  
Iron Meteorites ◽  
Forming Process ◽  
Silicate Inclusions ◽  
Partial Melting Process ◽  
Group Iva ◽  
History Of ◽  
Advanced Stages ◽  
Flow Group ◽  
Cosmic History

The chemistry of iron meteorites is compared to predictions of the chemical fractionations that develop during the cosmic history of the metal phase, from condensation and accretion through melting, segregation and freezing. Of the 12 resolved iron meteorite groups, 3 appear to have evolved in bodies which accreted at T > 1000° K. In several cases, the core-forming process seems to have ceased prematurely, just as the metal began to melt and flow (group IAB with its silicate inclusions) or after the metal aggregated into pods but before it sank to form a core (group IVA, with groups IIAB and IIIAB being in more advanced stages). The Shaw chondrite contains residual metal from a partial melting process, as required to complement the fractional melts which refroze prematurely in the case of group IAB meteorites.

Sign in / Sign up

Export Citation Format

Share Document