header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Oct 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 770
Basic information Name: Northwest Africa 770
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 770
Observed fall: No
Year found: 2000
Country: Morocco
Mass:help 18.1 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CH
Meteoritical Bulletin:  MB 85  (2001)  CH
MetBase:  v. 7.1  (2006)  CH3
Recommended:  CH3    [explanation]

This is 1 of 26 approved meteorites classified as CH3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CH chondrites, CH-CB family, and Metal-rich meteorites
Comments: Plots in Mauritania; must be 26degN
Writeuphelp
Writeup from MB 85:

Northwest Africa 770

Morocco

Found 2000 June

Carbonaceous chondrite (CH)

An 18.1 g crusted stone was found north of Legaaida by a person prospecting for meteorites. Mineralogy and classification (T. Bunch and J. Wittke, NAU): similar to Allan Hills 85085 in texture, mineral modes (pyroxene/olivine = 3:1, Fe-Ni metal = 27 vol%), and chondrule size (mean diameter = 23 µm), but with few "matrix lumps"; contains small, subrounded CAIs with pure gehlenite (MgO = 0.3 wt%) and micron­sized perovskite; 80% of chondrules are cryptocrystalline, and consist of stoichiometric enstatite (FeO = 0.24 wt%) and forsterite (FeO = 1.1 wt%); rare refractory chondrules have Al-rich diopside cores with spinel inclusions and forsterite rims (FeO = 0.45 wt%); metal grains average Ni = 6.1 wt% and Cr = 0.47 wt%; shock stage, S2; weathering grade, W1. Specimens: 3.2 g plus thin section, NAU; main mass with finder.

Data from:
  MB85
  Table 4
  Line 210:
Origin or pseudonym:Legaaida
Date:Jun 2000
Latitude:20°20.80'N
Longitude:11°50.03'W
Mass (g):18.1
Pieces:1
Class:CH
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 85, MAPS 36, A293-A322 (2001)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Geography:

Morocco
Coordinates:
     Catalogue of Meteorites:   (20° 21'N, 11° 50'W)
     Recommended::   (20° 20' 48"N, 11° 50' 2"W)
Note: the NHM and MetBase coordinates are 0.4 km apart

Statistics:
     This is 1 of 1405 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page