2025年3月17日 · Northwest Africa 2626 Basic information Name: Northwest Africa 2626 This is an OFFICIAL meteorite name. Abbreviation: NWA 2626 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: 31.1 g Classification history:

2009年12月15日 · The last Olivine-phyric basalt in our sample suite is NWA 2626, which is a 31 g stone purchased in Morroco in 2004 (Irving et al., 2005). The sample is very similar petrographically to NWA 1195 and NWA 2046 in that it features olivine megacrysts set in a matrix of smaller low-Ca pyroxene and plagioclase (maskelynite) grains, along with the ...

Petrology of NWA 2626: A 31.07 gram crusted stone (Figure 1) purchased in Morocco in November 2004 is an olivine-orthopyroxene-phyric shergottite. Unlike similar specimens we have studied [1], NWA 2626 has cross-cutting glass-rich veinlets and pockets (Figure 2), probably produced by shock during ejection from Mars.

2005年3月1日 · Shergottites such as Northwest Africa (NWA) 1110/1068 and perhaps Roberts Massif (RBT) 04261 that appear to be derived from more enriched sources have distinctly different olivine.

Petrology of NWA 2626: A 31.07 gram crusted stone (Figure 1) purchased in Morocco in November 2004 is an olivine-orthopyroxene-phyric shergottite. Unlike similar specimens we have studied [1], NWA 2626 has cross-cutting glass-rich veinlets and pockets (Figure 2), probably produced by shock during ejection from Mars.

NWA 5789 contains high 26Al, indicat-ing solar cosmic ray production. The ablation depth is less than a cm and preatmospheric radius was <5 cm that was similar to Y 980459.

An unusual black, fragmental breccia specimen found as several stones purportedly near Bir Anzarane, southern Morocco in 2012 is the first available specimen of an impact breccia from the Martian crust. A 320 gram specimen was designated as NWA 7034, but additional stones have been found, two of which have been designated as NWA 7475 and NWA 7533.

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Table 1 contains a list of Martian meteorite samples used in this study as well as some of their mineralogical and geochemical characteristics. The olivine-phyric shergottites analyzed in this study include NWA 1195, LAR 06319, NWA 1183, EETA79001 lithology A, DaG 476, NWA 2626, NWA 5789, and RBT 04262.

These data are essential in developing a volcanic stratigraphy model and possibly a terrestrial analog. Crystallization Ages: Not all specimens have been assigned a radiogenic igneous crystallization age, including NWA 6162, NWA 4925, NWA …