Abstract
Enstatite chondrites are characterised by highly reduced minerals1,2. Clinoenstatite and rare olivine are almost Fe-free, carbon occurs as graphite, and Fe, Ni-rich metal contains up to 4% Si. Ca, Ti, Mg and Mn, normally incorporated solely in silicates, are distributed between silicates and sulphides; Ti may also occur as a nitride. We now describe two types of clinoenstatite in the Indarch enstatite chondrite, one luminescing blue and one red. These clinoenstatites have distinct chemical compositions which indicate different redox conditions. The Indarch chondrite is an unannealed mechanical aggregate of diverse materials, and cannot have formed by simple progressive condensation of the solar nebula.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Keil, K. J. geophys. Res. 73, 6945 (1968).
Mason, B. Geochim. cosmochim. Acta 30, 23 (1966).
Leitch, C. A. & Smith, J. V. Meteoritics (in the press).
Allen, J. S., Nozette, S. & Wilkening, L. L. Lunar planet. Sci. 10, 27 (1979).
Binns, R. A. Miner. Mag. 37, 649 (1970).
Dodd, R. T. Earth planet. Sci. Lett. 30, 281 (1976).
Smith, J. V. Miner. Mag. 43, 1 (1979).
Hutchison, R., Bevan, A. W. R., Agrell, S. O. & Ashworth, J. R. Nature 280, 116 (1979).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Leitch, C., Smith, J. Two types of clinoenstatite in Indarch enstatite chondrite. Nature 283, 60–61 (1980). https://doi.org/10.1038/283060a0
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1038/283060a0
This article is cited by
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.