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| Northwest Africa 14607 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14607 This is an OFFICIAL meteorite name. Abbreviation: NWA 14607 Observed fall: No Year found: 2022 Country: Algeria Mass:  816 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 322 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 29 Jan 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14607 (NWA 14607) Algeria Find: 2021 Classification: Martian meteorite (Shergottite) History: Purchased by Matthew Stream from Bashir Saleck in 2022. Two identically appearing stones (621.7 + 194.6 g) were found together near Adrar, Algeria, in January 2021. Physical characteristics: Dark brown, sandblasted exterior with remnants of fusion crust. Fresh chipped surface reveals the presence of shiny macroscopic maskelynite. Petrography: (A. Ross and C. Agee, UNM) The two major phases in this meteorite are clinopyroxene and maskelynite. Ubiquitous minor phases are merrillite, apatite, titanomagnetite, ilmenite and troilite. The clinopyroxene has a modal abundance of approximately 65%, with significant core to rim zoning indicating an igneous crystallization trend with compositional zoning trends with sub-calcic augite and ferro-pigeonite clusters, Mg-rich orthopyroxene and Mg-Rich pigeonite compositions are absent. Clinopyroxene average grain size is approximately 300-500 μm. Maskelynite has modal abundance of approximately 25%, most grains are thin and elongate with maximum length ~1 mm. Silica-rich melt inclusions observed in maskelynite. Trace fayalite was detected. Geochemistry: (A. Ross and C. Agee, UNM) Clinopyroxene (all) Fs49.8±24.1Wo22.3±8.5. Fe/Mn=35±6, n=20; sub-calcic augite Fs25.9Wo32.3±2.3, Fe/Mn=30±3, n=7; ferro-pigeonite Fs74.9±4.3Wo15.2±2.4, Fe/Mn=41±2, n=9; maskelynite An48.4±4.7Ab47.8±3.7Or3.8±1.0, n=6; silica-rich inclusions SiO2=79.1±1.2, Al2O3=12.0±1.4, CaO=1.2±0.3, Na2O=3.6±0.4, K2O=1.9±0.6 (wt%), n=2; fayalite Fa94.2, Fe/Mn=61. Classification: Evolved pyroxene-phyric shergottite basalt. Specimens: 20 g plus a probe mount on deposit at UNM, Matthew Stream holds the main masses. | ||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:
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Statistics: This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||||
| Also see: |
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| Revision history: |
This lists important revisions made to data for this record.
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