| Home | News & Events | Publications | Membership | Resources | Search | Contact us |
|
|||||||||
|
|||||||||
| Northwest Africa 3190 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: Northwest Africa 3190 This is an OFFICIAL meteorite name. Abbreviation: NWA 3190 Observed fall: No Year found: 2006 Country: (Northwest Africa) Mass:  40.7 g | ||||||||
| Classification history: |
This is 1 of 38 approved meteorites classified as Lunar. [show all] Search for other: Planetary meteorites, Lunar meteorites | ||||||||
| Comments: |
Approved 14 Jan 2008 Revised 4 Aug 2008: final writeup | ||||||||
| Writeup |
Writeup from MB 93:
Northwest Africa 3190 Northwest Africa Find: 2006 Achondrite (lunar, mingled breccia) History and Physical characteristics: A. Aaronson purchased a 40.7 g partially crusted, complete stone in Rissani, Morocco, in December 2006. The hand specimen exhibits an abundance of large (between 0.6 and 2.1 mm in diameter) anorthositic clasts. The weathered portion of the crust is pale vermillion to light brown; the fresher crust is dark gray to black. Petrography: (T. Bunch and J. Wittke, NAU; A. Irving, UWS) This mingled breccia contains anorthositic lithologies that include anorthosite, anorthositic norites, gabbros, and troctolites, in addition to variolitic and subophitic basalt clasts, breccia-within-breccia clasts, and an abundance of olivine and plagioclase fragments. Melt and fragmental matrices are heterogeneously distributed. The interior shows very low weathering effects. Mineral compositions: Anorthositic norite orthopyroxene (Fs28.5Wo3.8; FeO/MnO = 65). Olivine gabbro contains olivine (Fa26.2; FeO/MnO = 96), plagioclase (An92.3), subcalcic pyroxene (Fs21.6Wo14.4; FeO/MnO = 48), and ilmenite with MgO = 6.5 wt%. Variolitic basalt has olivine (Fa35.7; FeO/MnO = 103), pigeonite (Fs24.6Wo8.7) and plagioclase (An95.5). Bulk composition: (R. Korotev, WUSL) FeO = 9.6 wt%, Sm = 3.9 ppm, Th = 1.4 ppm, Ir = 6.5 ppb. Classification: Achondrite (lunar, mingled breccia). Probably paired with NWA 2995, based on essentially identical bulk compositions. Type specimens: A total of 8.8 g is on deposit at NAU. The main mass holder is anonymous. Submitted by: T. Bunch, NAU. | ||||||||
| Data from: MB93 Table 2 Line 12: |
|
||||||||
| Institutions and collections |
Aaronson: No contact information provided. (private address) NAU: Northern Arizona University, Flagstaff, AZ 86011, USA; Website (institutional address) UWS: University of Washington, Department of Earth and Space Sciences, Box 351310, Seattle, WA 98195, USA (institutional address) WUSL: McDonnell Center for Space Sciences, Washington Univ., One Brookings Drive, St. Louis, MO 63130, USA (institutional address) |
||||||||
| Catalogs: |
| ||||||||
| References: | Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
| ||||||||
| Geography: |
Statistics: This is 1 of 2417 approved meteorites from (Northwest Africa) (plus 2233 unapproved names) | ||||||||