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Northwest Africa 7838
Basic information Name: Northwest Africa 7838
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7838
Observed fall: No
Year found: 2012
Country: (Northwest Africa)
Mass:help 120.8 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H3
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 14 May 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7838 (NWA 7838)

(Northwest Africa)

Purchased: 2012

Classification: Ordinary chondrite (H3)

History: A single stone weighing 120.8 g was found and purchased in Agadir in 2012. Thomas Webb acquired the sample from a meteorite prospector in November of 2012.

Physical characteristics: The stone is devoid of fusion crust, but the shape appears to show orientation formed during flight. Chondrules are readily visible on the surface of the stone.

Petrography: (A. Love, App): Sample displays numerous, well-defined 133-1972 μm (mean 630 μm, n=109), close-packed, type I and type II chondrules and fragments in a fine-grained opaque matrix. Several black, 0.73-2.2 mm opaque very fine-grained matrix lumps occur between the chondrules. Many chondrules display fine-grained rims (some up to 300 μm thick).

Geochemistry: (A. Love, App) Olivine, Fa14.2±8.2 (N=24); pyroxene, Fs9.2±5.7Wo1.2±0.8 (N=15).

Specimens: 20.0 g and one thin section are on deposit at App.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Agadir
Date:P 2012
Mass (g):120.8
Pieces:1
Class:H3
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):14.2±8.2 (N=24)
Ferrosilite (mol%):9.2±5.7 (N=15)
Wollastonite (mol%):1.2±0.8 (N=15)
Classifier:A. Love, App
Type spec mass (g):20.0
Type spec location:App
Main mass:TWebb
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
TWebb: No contact information provided., United States (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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