Some clues to the history of the H-group chondrites

Details Some clues to the history of the H-group chondrites Some clues to the history of the H-group chondrites

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981e%26psl..54...67m&link_type=abstract

Earth and Planetary Science Letters, vol. 54, no. 1, June 1981, p. 67-80. Delegation Generale a la Recherche Scientifique et Te

Mathematics

Logic

13

Chondrites, Meteoritic Composition, Mineralogy, Petrology, Chemical Analysis, Chondrule, Crystallography, Electron Microscopy, Morphology, Bremervorde Meteorite, Tieschitz Meteorite, Beaver Creek Meteorite, Iron, Guenie Meteorite, Menow Meteorite, Ste. Marguerite En Comines Meteorite, Allegan Meteorite, Sena Meteorite, Kernouve Meteorite, Plagioclase, Sem, Chromite, Phosphates, Troilite, Meteorites, H Chondrites, Chemistry, Morphology, Chondrules, Crystals, Nickel, Sulfur, Samples, Meteorite, Mineralogy, Cl

Scientific paper

SEM, optical and chemical observations have been performed on twelve H3-6 chondrites, nine of them being also studied by other groups. Morphological features of chondrules and crystals (growth steps) are shown, and the significance of the finely crystallised troilite in Menow and Ambapur Nagla is discussed in the light of the discovery that the NiFe blebs associated with it are Ni-rich (50-60 percent Ni). Sulphur should have been mobilized without shock evidence, possibly as a result of solar heating. Prechondritic relict material is recognized by anomalous or variable mineral compositions, and in some cases, by the presence of overgrowths on relict cores. After short notes on individual chondrites, a tentative history of H chondrites is proposed. The chondrule-forming episode is considered as a remelting of pre-existing material. The accretion would immediately follow this event for type 6 (around 1000 C), and would occur at progressively lower temperature for types 5 and 4. Type 3 would represent material coming from an extended source region, an hypothesis consistent with the broader range composition of the particles and with their cooling before accretion to much lower temperatures (below 350 C).

Affiliated with

Also associated with

No associations

Rating

Some clues to the history of the H-group chondrites 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 Some clues to the history of the H-group chondrites, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Some clues to the history of the H-group chondrites will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-993522