6 天之前 · Northwest Africa 2828: reclassification Rubin (2016) reclassified Al Haggounia 001 and paired specimens as "vesicular, incompletely melted, EL chondrite impact melt rock[s]." NWA 2828 is likely paired, and is therefore also reclassified.

2016年7月20日 · The massive Al Haggounia 001/NWA 2736/NWA 2828/NWA 7401 EL chondrite suffered a high-energy collision on its parent asteroid, producing numerous shock effects (1) shock deformation of silicate grains and the development in them of strong undulose extinction and weak mosaicism; (2) dispersion of metal-sulfide blebs along fractures within the ...

The well-formed, round chondrules containing glass coupled with the unrecrystallized matrix lead us to re-classify NWA 2828 as an EL3 chondrite. We also must revise our opinion [1] about the relationship between NWA 2828 and material classified as EL chondrites NWA 2965 and NWA 2736, which evidently come from the more extensively weathered top ...

Haggounia 001/NWA 2736/NWA 2828/NWA 7401 EL chondrite suffered a high-energy collision on its parent asteroid, producing numerous shock effects: (1) shock deformation of silicate grains and the develop-ment in them of strong undulose and weak mosaic extinction, (2) dispersion of metal-sulfide blebs along

Aubrite NWA 2828: Pale gray microbreccia composed mainly of twinned enstatite with subordinate plagioclase (An13.5-15.3Or3-4) and altered troilite (with daubreelite blades). Rare Mn-alabandite, daubreelite, oldhamite, Ti-free troilite, and very rare kamacite specks are …

Al Haggounia 001 and paired specimens (including Northwest Africa [NWA] 2828 and 7401) are part of a vesicular, incompletely melted, EL chondrite impact melt rock with a mass of ~3 metric tons.

2009年1月31日 · Here is an interesting paper on the correct classification of Al-Haggounia 001, NWA 2828 and their pairings. Contrary to the original classification, these are NOT aubrites. They are EL-3 enstatite chondrites. They are also considered "relict" meteorites or "fossil" meteorites.

Weight: 14.00 grams Size: 60x45x11 mm Shape: Part slice Robert Zdancewicz. Weight: 4,1g Size: 35x20x2mm Shape: Slice

The Enstatite-rich Al Haggounia 001 meteorite was found in 2006. Some material from the same meteorite has also been reported under the name of Northwest Africa 2828 (NWA 2828). Approximately 3 tons are reported to have been found strewn over 40-50 kilometers including both Morocco and Western Sahara.

2016年7月20日 · Both impact melting and weathering altered the meteorite's bulk chemical composition: e.g., impact melting and loss of a metal-sulfide melt from NWA 2828 is responsible for bulk depletions in common siderophile elements and in Mn (from alabandite); weathering of oldhamite caused depletions in many rare earth elements; the growth of secondary ...