Toluca (meteorite)
Toluca | |
---|---|
![]() 500g Toluca slice | |
Type | Iron |
Structural classification | Coarse Octahedrite |
Group | IAB-sLL |
Composition | 90.5% Fe; 8.1% Ni |
Country | Mexico |
Region | Toluca Valley, Jiquipilco, Mexico State |
Coordinates | 19°27′N 99°35′W / 19.450°N 99.583°W[1] |
Observed fall | No |
Fall date | >10,000 years ago |
Found date | about 1776 |
TKW | 3 tonnes |
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Toluca is a group of iron meteorites found in Jiquipilco, Mexico near Toluca.[1]
History
[edit]The meteorites probably crashed into Earth more than 10,000 years ago.[2] For centuries, Mexican people living near the meteorites used them as a source of metal for various tools. They were first described by conquistadores in about 1776.[1]
The total known mass is about 3 tonnes.[3]
Composition and classification
[edit]These iron meteorites are a coarse octahedrite, chemical type IAB-sLL.[3] The mean composition is 90.5% Fe and 8.1% Ni.[1] They often contain large troilite inclusions.
See also
[edit]References
[edit]- ^ a b c d Vagn Fabritius Buchwald (1975). "Handbook of Iron Meteorites".
- ^ Vagn Fabritius Buchwald (2005). Iron and Steel in Ancient Times. ISBN 978-87-7304-308-0.
- ^ a b Meteoritical Bulletin Database: Toluca