header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Jul 2020
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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 6870
Basic information Name: Northwest Africa 6870
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 6870
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 1950 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  CV3
Recommended:  CV3    [explanation]

This is 1 of 536 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 17 Feb 2017
Writeuphelp
Writeup from MB online:

Northwest Africa 6870 (NWA 6870)

(Northwest Africa)

Purchased: 2011 May

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Greg Catterton in May 2011 from a dealer in Ouarzazate, Morocco.

Physical characteristics:

Petrography: (A. Irving and S. Kuehner, UWS) Round to irregular-shaped chondrules (mostly granular, some rimmed) and fine grained CAIs are set in a dark brown matrix.

Geochemistry: Olivine (Fa1.0-32.7), orthopyroxene (Fs0.9-1.1Wo1.1-0.8), augite (Fs1.0Wo38.5); diopside in one CAI is Fs0.2Wo50.2. Oxygen isotopes of acid-washed subsamples: d17O -6.880, -7.446; d18O -2.347, -3.062; D17O -5.665, -5.858 per mil (Ryoji Tanaka, Okayama University).

Classification: Carbonaceous chondrite (CV3).

Specimens: 20 g including one polished thin section at UWB; remainder with Mr. G. Catterton.


Writeup from MB 106:

Northwest Africa 6870 (NWA 6870)

Northwest Africa

Purchased: 2011 May

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Greg Catterton in May 2011 from a dealer in Ouarzazate, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Round to irregular-shaped mm-sized chondrules (mostly granular, some rimmed) and fine grained CAIs are set in a dark brown matrix.

Geochemistry: Olivine (Fa1.0, Fa32.7, N=2), orthopyroxene (Fs0.9Wo1.1, Fs1.1Wo0.8, 0.8, N=2), augite (Fs1.0Wo38.5, N=1); diopside in one CAI is Fs0.2Wo50.2 (N=1). Oxygen isotopes of acid-washed subsamples: δ17O -6.880, -7.446; δ18O -2.347, -3.062; Δ17O -5.665, -5.858 per mil (Ryoji Tanaka, OkaU).

Classification: Carbonaceous chondrite (CV3).

Specimens: 20 g including one polished thin section at UWB; 26.6 g and two polished mounts at App; remainder with Mr. G. Catterton.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Ouarzazate
Date:P 2011 May
Mass (g):1950
Pieces:29
Class:CV3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):1.0, 32.7 (N=2)
Ferrosilite (mol%):0.9, 1.1 (N=2)
Wollastonite (mol%):1.1, 0.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWB
Main mass:G. Catterton
Comments:GC11-2; submitted by A. Irving
Plots: O isotopes:  
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)
Catalogs:
References: Published in
Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7328 approved meteorites from (Northwest Africa) (plus 1973 unapproved names)

Direct link to this page