6 天之前 · 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

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.

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 ...

NWA 2626. The shergottite NWA 2626 consists mainly of olivine and low-Ca pyroxene in a ground-mass containing pigeonite, maskelynite, merrillite, and other minor phases [1]. Irving [2] classifies this meteorite as a permafic (current boundaries 0.5 ≤ Mg/[Mg+Fe]≤ 0.7 and 3.6 ≤CaO ≤9), depleted (La/La(CI)<1 and Lu/Lu(CI)~6) olivine phyric ...

2005年3月1日 · Recent Martian meteorite discoveries (NWA 7034, NWA 7635, and NWA 8159) are also significantly older than the shergottites and NWA 7034 contains clasts which have a similar range in...

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. Inside a thin weathering rind,

2023年11月1日 · NWA 2046 and NWA 4925 contain more evolved olivine (Mg# 83 and 81, respectively) that are in equilibrium with their bulk-rock Mg# and represent slightly more evolved melt compositions (Peel et al., 2023). In contrast, olivine in the DaG and SaU shergottites are not in equilibrium with bulk-rock compositions suggesting variable accumulation of ...

Crystallization Ages: Not all specimens have been assigned a radiogenic igneous crystallization age, including NWA 6162, NWA 4925, NWA 2046, NWA 2626, NWA 5789, LAR 12095/12240.

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.

La météorite martienne NWA 2626 a été achetée en novembre 2004 au Maroc par un chasseur de météorites. Il s'agit d'une petite pierre ronde couverte par une très belle croûte de fusion brillante. Une partie de sa surface a cependant été superficiellement altérée durant …