A silicate inclusion in Puente del Zacate, a IIIA iron meteorite

E J Olsen; A M Davis; R N Clayton; T K Mayeda; C B Moore; I M Steele

doi:10.1126/science.273.5280.1365

A silicate inclusion in Puente del Zacate, a IIIA iron meteorite

Science. 1996 Sep 6;273(5280):1365-7. doi: 10.1126/science.273.5280.1365.

Authors

E J Olsen¹, A M Davis, R N Clayton, T K Mayeda, C B Moore, I M Steele

Affiliation

¹ Department of the Geophysical Sciences, University of Chicago, Chicago, IL 60637, USA.

PMID: 8703065
DOI: 10.1126/science.273.5280.1365

Abstract

The IIIA and IIIB iron meteorites are considered to have formed in the cores of asteroids. A silicate inclusion within the IIIA meteorite Puente del Zacate consisting of olivine (Fa4), low-calcium pyroxene (Fs6Wo1), chromium diopside (Fs3Wo47), plagioclase (An14Or4), graphite, troilite, chromite, daubreelite, and iron metal resembles inclusions in IAB iron meteorites. The oxygen isotopic composition of the Puente del Zacate inclusion is like chromite and phosphate inclusions in other IIIA and IIIB irons. The Puente del Zacate inclusion may have been derived from the lower mantle of the IIIAB parent asteroid.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Meteoroids*
Oxygen Isotopes*
Silicates / analysis*

Substances

Oxygen Isotopes
Silicates