Meteoritical Bulletin: Entry for Northwest Africa 7300

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Northwest Africa 7300

Basic information

Name: Northwest Africa 7300
This is an OFFICIAL meteorite name.
Abbreviation: NWA 7300
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass: 20.2 g

Classification
history:

Meteoritical Bulletin:	MB 103	(2014)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 14 Jan 2014

Writeup

Writeup from MB 103:

Northwest Africa 7300 (NWA 7300)

(Northwest Africa)

Found: 2009

Classification: HED achondrite (Eucrite)

Petrography: Polymict, cumulate eucrite of mostly coarse-grained basaltic clasts (up to few mm in size). Clasts has ophitic texture and consist of elongated feldspar (200–600 μm long) and granular pyroxene. Groundmass is composed of pyroxene (pigeonitic compositions with exsolution lamellae of augite), feldspar, chromite, ilmenite, and rare Fe-rich olivine.

Geochemistry: Average compositions: Ca-poor pyroxene, Fs_48.9±15.5Wo_2.3±1.6; pigeonite, Fs_53.8±3.2Wo_14.3±3.8; augite, Fs_32.7±9.2Wo_36.2±8.6; feldspar, An_90.1±2.3(An_85.2–92.5); chromite, Cr/Cr+Al = 0.71.

Data from:
  MB103
  Table 0
  Line 0:

Date:	2009
Mass (g):	20.2
Pieces:	1
Class:	Eucrite
Shock stage:	moderate
Ferrosilite (mol%):	44.4±15.2 (25.0–64.1, N=23)
Wollastonite (mol%):	13.6 (0.7-43.5)
Classifier:	N. Chaumard and B. Devouard, UBP
Type spec mass (g):	4.7
Type spec location:	MNHNP
Main mass:	Franco
Comments:	Submitted by CHAUMARD NOEL BERTRAND DEVOUARD

Institutions
and collections

MNHNP: Museum National d'Histoire Naturelle, IMPMC-CP52, 57 rue Cuvier, 75005 Paris, France, France; Website (institutional address)
UBP: Universite Blaise Pascal, Clermont-Ferrand, France (institutional address)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9914 approved meteorites from (Northwest Africa) (plus 1841 unapproved names)

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