Repeated shock and thermal metamorphism of the Abernathy meteorite

Details Repeated shock and thermal metamorphism of the Abernathy meteorite Repeated shock and thermal metamorphism of the Abernathy meteorite

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984metic..19...29l&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 19, March 31, 1984, p. 29-48.

Computer Science

5

Chondrites, Impact Melts, Metamorphism (Geology), Meteoritic Composition, Petrography, Shock Heating, Breccia, Geochronology, Iron Compounds, Microhardness, Mineralogy, Olivine, Optical Measurement, Meteorites, Abernathy, L6 Chondrites, Thermal Effects, Metemorphism, Shock, Petrography, Chronology, Techniques, Features, Texture, Optical Properties, Mineralogy, Refractive Index, Metallography, Characteristics, Formation, Heating, Melting, Data

Scientific paper

Based on the example of Abernathy (L6 chondrite), it is shown how petrographic investigation can be used to unravel the nature, chronology and conditions of superposed metamorphic events in chondrites. Features considered include the texture of the rock, optical characteristics of olivine, pyroxene and plagioclase, refractive index of plagioclase, metallographical characteristics and microhardness of Fe-Ni alloys. It is deduced that Abernathy has been involved in at least six metamorphic events since the formation of the chondrite. Four distinct shock events and two separate reheating events have been identified. The chronology of these events is established. The conditions for the last four events are reasonably well constrained. These include severe reheating (T greater than 1200 C); severe shock causing complete melting of plagioclase and local melting of the rock (P between 90 and 110 GPa, T between 1250 and 1350 C); mild shock (P between 10 and 25 GPa, T less than 500 C); and reheating below 800 C.

Affiliated with

Also associated with

No associations

Rating

Repeated shock and thermal metamorphism of the Abernathy meteorite 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 Repeated shock and thermal metamorphism of the Abernathy meteorite, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Repeated shock and thermal metamorphism of the Abernathy meteorite will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1043062