header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 29 Jan 2023
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 7570
Basic information Name: Northwest Africa 7570
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7570
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 402 g
Classification
  history:
Meteoritical Bulletin:  MB 101  (2012)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Dec 2012
Writeuphelp
Writeup from MB 101:

Northwest Africa 7570 (NWA 7570)

Morocco

Purchased: Sept 2012

Classification: HED achondrite (Eucrite)

History: Purchased by Adam Bates from a Moroccan meteorite dealer, September, 2012.

Physical characteristics: Single stone, irregular brown exterior with some iron-staining. Saw cut reveals granular texture with white and reddish-brown sub-millimeter crystals.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows ophitic to brecciated texture, approximately 50% pyroxene and 40% plagioclase; some pyroxenes show exsolution lamellae. Ubiquitous silica, chromite, ilmenite, troilite, and low-Ni iron metal.

Geochemistry: (C. Agee and M. Spilde, UNM) Pyroxene Fs40.6±12.1Wo20.5±15.9, Fe/Mn=25±1, n=22; plagioclase An87.8.

Classification: Achondrite (Eucrite), equilibrated eucrite, pyroxene trend is transitional between Pomozdino (cumulate) and Juvinas (basaltic).

Specimens: 21 g including a probe mount on deposit at UNM; Adam Bates holds the main mass.

Data from:
  MB101
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Sept 2012
Mass (g):402
Pieces:1
Class:Eucrite
Ferrosilite (mol%):40.6±12.1
Wollastonite (mol%):20.5±15.9
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Adam Bates
Comments:Submitted by C. Agee
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

Direct link to this page