Plessites and associated structures in the Cape York iron meteorite revealed by chlorine corrosion
✍ Scribed by A.J. Easton; D. Claugher; V.F. Buchwald
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 535 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0739-6260
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✦ Synopsis
The selective attack of meteoritic minerals by chlorine has been used to reveal structures, formed during prolonged extra-terrestrial cooling, in certain iron meteorites. Several minerals, including low-nickel metal (kamacite), iron sulphide (troilite) and chromite (Reichenbach lamellae), are preferentially corroded by chlorine at 350°C, leaving other minerals suitably exposed for examination by the scanning electron microscope and theelectron microprobe. Information on elemental distribution in relation to topography has been obtained over the boundary ofa plessite (a fine-grained intergrowth ofkamacite and taenite)and also forkamacite with its associated schreibersite which enclosed Reichenbach lamallae.