Meteoritical Bulletin: Entry for Northwest Africa 14240

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Northwest Africa 14240

Basic information

Name: Northwest Africa 14240
This is an OFFICIAL meteorite name.
Abbreviation: NWA 14240
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass: 7.45 kg

Classification
history:

Recommended:

H6 [explanation]

This is 1 of 6686 approved meteorites (plus 5 unapproved names) classified as H6. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Comments:

Approved 18 Sep 2021

Writeup

Writeup from MB 110:

Northwest Africa 14240 (NWA 14240)

(Northwest Africa)

Purchased: 2020

Classification: Ordinary chondrite (H6)

History: Purchased in 2020 by Dean Bessey from a mineral dealer in Erfoud, Morocco

Physical characteristics: Individual stone with regmaglypts and partly abraded fusion crust.

Petrography: (K. Metzler, IfP) Unbrecciated ordinary chondrite with high metal content. It shows a strongly recrystallized texture with blurred outlines of chondrule relicts. Secondary feldspar grains mostly >50 µm.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition is Fa_19.0±0.4(Fa_18.4-19.6; n=10); mean low-Ca pyroxene composition is Fs_16.5±0.2Wo_1.5±0.1(Fs_16.2-16.8Wo_1.3-1.6; n=10).

Classification: H chondrite based on the high metal content and mineral chemistry. Petrologic type 6 based on the equilibrated state of olivine and pyroxene and large grain size of secondary plagioclase.

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2020
Mass (g):	7454
Pieces:	1
Class:	H6
Shock stage:	C-S1
Weathering grade:	W0/1
Fayalite (mol%):	19.0±0.4
Ferrosilite (mol%):	16.5±0.2
Wollastonite (mol%):	1.5±0.1
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Dean Bessey, Brisbane, Australia
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Bessey: Dean Bessey ,P.O. Box 40810, Glenfield, Auckland 1310 , New Zealand; Website (private address)

Catalogs:

References:

Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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