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Northwest Africa 1834
Basic information Name: Northwest Africa 1834
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1834
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 20.2 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Ureilite
MetBase:  v. 7.1  (2006)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 594 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Writeuphelp
Writeup from MB online:

Northwest Africa 1834

Morocco

Found 2002

Achondrite (ureilite)

A 20.17 g stone was purchased in Rissani, Morocco in 2003. Classification and mineralogy (J. Wittke and T. Bunch NAU): typical, medium to fine-grained (<2 mm) ureilite, non- foliated, and with only thin (0.015 mm) reduced rims on olivine and pigeonite. Interstitial metal (Ni = 2.92 wt. %; Co, 0.51 %; Si, 2.4 %) is partially oxidized. Millimeter-size graphite occurs at grain boundaries of main phases and contains silica platelets (< 3 μm) and clusters of sulfide and schreibersite. Olivine = mg# 88 with 0.87 wt % Cr2O3 and 0.57 % CaO; pigeonite = mg# 88 and contains up to 1.0 wt. % Cr2O3. Shock level, S2 and only slightly weathered. Specimens: 4.2 g at NAU; main mass, Oakes.

Data from:
  MB89
  Table 7
  Line 23:
Place of purchase:Morocco
Date:2002
Mass (g):20.2
Pieces:1
Class:Ure
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):12
Ferrosilite (mol%):12
Classifier:
Type spec mass (g):4.2
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8025 approved meteorites from (Northwest Africa) (plus 1951 unapproved names)

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