Meteoritical Bulletin: Entry for Northwest Africa 7615

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Northwest Africa 7615

Basic information

Name: Northwest Africa 7615
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7615
Observed fall: No
Year found: 2012
Country: Morocco
Mass: 1100 g

Classification
history:

Meteoritical Bulletin:	MB 102	(2013)	CK6
Recommended:			CK6 [explanation]

This is 1 of 83 approved meteorites classified as CK6. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites

Comments:

Approved 28 Jan 2013

Writeup

help

Writeup from MB 102:

Northwest Africa 7615 (NWA 7615)

Morocco

Purchased: Aug 2012

Classification: Carbonaceous chondrite (CK6)

History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012.

Physical characteristics: Single stone, weathered fusion crust, saw-cut reveals gray, very fine-grained texture, with a few small indistinct chondrules.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows dominant olivine of variable grain size, some up to 1 mm; olivine grain boundaries occupied by plagioclase, aluminous low-Ca pyroxene, and high-Ca pyroxene; ubiquitous Cr-rich magnetite; rare relict chondrules barely discernible in BSE.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa_24.7±0.4, Fe/Mn=87±6, NiO=0.48±0.09 wt%, n=12; aluminous low-Ca pyroxene Fs_25.1±1.2Wo_2.1±2.2, Fe/Mn=75±4, n=2; high-Ca pyroxene Fs_7.8Wo_46.2, Fe/Mn=41; plagioclase Or_4.0±1.8Ab_67.5±6.4An_28.4±7.9, n=4; magnetite with 3.6 wt% Cr₂O₃.

Classification: Carbonaceous chondrite (CK6)

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

Data from:
  MB102
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P Aug 2012
Mass (g):	1100
Pieces:	1
Class:	CK6
Fayalite (mol%):	24.7±0.4
Ferrosilite (mol%):	25.1±1.2
Wollastonite (mol%):	2.1±2.2
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. 102, MAPS 50, 1662, September 2015

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Geography:

Morocco

Morocco

Coordinates:

Unknown.

Statistics:
This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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Revision
history:

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