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The Tomhannock Creek, New York, chondrite

Published online by Cambridge University Press:  14 March 2018

Brian Mason  and
H. B. Wiik
Brian Mason
Affiliation:
The American Museum of Natural History, New York
H. B. Wiik
Affiliation:
Geologiska Forskningsanstalten, Otnäs, Finland
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Summary

The Tomhannock Creek chondrite has been analysed, with the following results: Fe 11·36, Ni 1·69, Co 0·07, FeS 5·26, SiO2 36·88, TiO2 0·135, Al2O3 1·80, Cr2O2 0·30, FeO 14·94, MnO 0·31, MgO 23·81, CaO 1·39, Na2O 0·73, K2O 0·095, P2O5 0·36, H2O+ 0·34, C 0·10; total 99·57. The mineralogical composition is olivine (Fo81), hypersthene (En83), plagioclase (An22), nickel-iron, troilite, chromite, and probably apatite. The density of the meteorite is 3·65.

Tomhannock Creek is not identical with Homestead, nor with Yorktown. Yorktown is a chondrite that appears to have fallen near Yorktown, Westchester County, New York (41° 17′ N., 73° 49′ W.), in September 1869.

Information

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 32 , Issue 250 , September 1960 , pp. 528 - 534
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1960

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