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Astronomy and Cosmology
Astronomy and Astrophysics
Adding more meteorites to my collection
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[QUOTE="davenn, post: 6344838, member: 283516"] here's my latest acquition It from an observed fall on the 24th April 2020 It's an ordinary Chondrite, all 11.56g of it, with a nice fresh fusion crust on one end Class L6 Definition from The Meteoritical Bulletin …. The recommended classification [B]L6[/B] means: "An [COLOR=rgb(226, 80, 65)]ordinary chondrite[/COLOR] from the[COLOR=rgb(226, 80, 65)] L group[/COLOR] that is petrologic [COLOR=rgb(226, 80, 65)]type 6[/COLOR]." The highlighted words are defined as follows: [COLOR=rgb(226, 80, 65)]Ordinary chondrite[/COLOR]: A major class of chondrites, distinguished by sub-solar Mg/Si and refractory/Si ratios, oxygen isotope compositions that plot above the terrestrial fractionation line, and a large volume percentage of chondrules, with only 10-15 vol% fine-grained matrix. [COLOR=rgb(226, 80, 65)]L group[/COLOR]: The low-iron (L) chemical group of ordinary chondrites, distinguished by their relatively low siderophile element content, moderate sized chondrules (~0.7 mm), and oxygen isotope compositions that intermediate between H and LL group ordinary chondrites. [COLOR=rgb(226, 80, 65)]Type 6[/COLOR]: Designates chondrites that have been metamorphosed under conditions sufficient to homogenize all mineral compositions, convert all low-Ca pyroxene to orthopyroxene, coarsen secondary phases such as feldspar to sizes ≥50 µm, and obliterate many chondrule outlines; no melting has occurred.[ATTACH type="full"]263223[/ATTACH] One of my USA meteorite friend's has contacts in Kenya and they were able to secure a number of large chunks within hours of it hitting the ground. This is great as it wasn't drenched with rain. His 5kg of samples ( out of the 20 - 35kg known to have been collected) arrived to him yesterday 20th May ( his date) he has broken them up into many smaller samples for sale. Most of which has now been purchased by collectors worldwide. It cost me US$15/g, not too bad for a brand new fall. This is rather special to me being the freshest meteorite in my collection :smile: :partytime: cheers Dave [/QUOTE]
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Adding more meteorites to my collection
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