A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern

Details A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985gecoa..49..397n&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 49, Feb. 1985, p. 397-410.

Computer Science

12

Iron Meteorites, Kamacite, Meteoritic Composition, Meteoritic Microstructures, Widmanstatten Structure, Computerized Simulation, Cooling, Nickel Alloys, Phase Diagrams, Precipitates, Meteorites, Iron Meteorites, Cooling, Experiments, Patterns, Kamacite, Thermal Effects, Techniques, Procedure, Electron Microscopy, Simulations, Chemistry, Composition, Taenite, Matrix, Description, Nucleation, Aem, Nickel, Phosphorous, Phases, Kinetics, Parent Bodies, Thermal History, Diffusion, Models

Scientific paper

Intragranular kamacite has been experimentally grown in Fe-Ni-P alloys containing between 5 and 10 percent by weight Ni and between 0 and 1.0 percent by weight P. The nucleation and growth process of these precipitates is studied using analytical electron microscopy techniques. A numerical model is developed to simulate the growth of intragranular kamacite in Fe-Ni-P alloys based on the experimental results, and this model is used to revise the existing cooling rate estimates of iron meteorites from observed Widmanstaetten patterns. It is found that heterogeneous sites like phospides are necessary for the nucleation of intragranular kamacite in the Fe-Ni-P system, and that kamacite size depends largely on the bulk Ni content and the cooling rate and to a lesser extent on the P concentration. The cooling rates predicted by the new model are two orders of magnitude greater than those previously estimated. To accommodate the new rates, meteorite parent bodies need only be a few kilometers in diameter.

Affiliated with

Also associated with

No associations

Rating

A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A major revision of iron meteorite cooling rates - an experimental study of the growth of the Widmanstaetten pattern will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1591784