Mathematics – Logic
Scientific paper
Jun 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990metic..25..127c&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 25, June 1990, p. 127-135.
Mathematics
Logic
5
Breccia, Chondrites, Impact Melts, Meteoritic Composition, Regolith, Gas Analysis, Meteoritic Microstructures, Pyroxenes, Spain, Meteorites, Origin, Formation, History, Chondrites, Regolith, Melts, Fragments, Breccia, Samples, Meteorite, Ordinary Chondrites, Oviedo, Classification, H5 Chondrites, Cabezo De Mayo, Sevilla, Ll4 Chondrites, Canellas, H4 Chondrites, Gerona, H5 Chondrites, Madrid, L6 Chondrites, Procedure, Description, Composition, Olivine, Pyroxene, Petrology, Laboratory Studies, Photographs
Scientific paper
Six ordinary chondrite breccias from the Museo Nacional de Ciencias Naturales, Madrid (Spain), are described and classified as follows: the solar gas-rich regolith breccia Oviedo (H5); the premetamorphic fragmental breccias Cabezo de Mayo (type 6, L-LL), and Sevilla (LL4); the fragmental breccias Canellas (H4) and Gerona (H5); and the impact melt breccia, Madrid (L6). It is confirmed that chondrites with typical light-dark structures and petrographic properties typical of regolith breccias may (Oviedo) or may not (Canellas) be solar gas-rich. Cabezo de Mayo and Sevilla show convincing evidence that they were assembled prior to peak metamorphism and were equilibrated during subsequent reheating. Compositions of olivine and low-Ca pyroxene in host chondrite and breccia clasts in Cabezo de Mayo are transitional between groups L and LL. It is suggested, based on mineralogic and oxygen isotopic compositions of host and clasts, that the rock formed on the L parent body by mixing, prior to peak metamorphism. This was followed by partial equilibrium of two different materials: the indigenous L chondrite host and exotic LL melt rock clasts.
Casanova Ignacio
Keil Klaus
King Edward A.
San Miguel A.
Wieler Rainer
No associations
LandOfFree
Origin and history of chondrite regolith, fragmental and impact-melt breccias from Spain 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 Origin and history of chondrite regolith, fragmental and impact-melt breccias from Spain, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Origin and history of chondrite regolith, fragmental and impact-melt breccias from Spain will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-988035