Meteoritical Bulletin: Entry for Northwest Africa 8647

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Northwest Africa 8647

Basic information

Name: Northwest Africa 8647
This is an OFFICIAL meteorite name.
Abbreviation: NWA 8647
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass: 326 g

Classification
history:

Meteoritical Bulletin:	MB 104	(2015)	Eucrite-br
Recommended:			Eucrite-br [explanation]

This is 1 of 237 approved meteorites classified as Eucrite-br. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 6 Jan 2015

Writeup

Writeup from MB 104:

Northwest Africa 8647 (NWA 8647)

(Northwest Africa)

Purchased: 2010

Classification: HED achondrite (Eucrite, brecciated)

History: Numerous individuals up to several cm in size, all partly covered with fusion crust, were bought at a mineral market in Erfoud, Morocco.

Petrography: The meteorite is a breccia composed of basaltic lithologies and mineral fragments set into a fine-grained melt-rich matrix. Calcic plagioclase and exsolved pyroxene are dominant minerals; accessories include SiO₂ polymorphs, chromite, and troilite. The rock contains abundant recrystallized shock melt.

Geochemistry: low-Ca pyroxene, Fs_60±0.9Wo_2.9±0.7(Fs_58.3-61.3Wo_2.2-4.7, n=15, FeO/MnO=30-34); Ca-pyroxene, Fs_26.3±1.1Wo_43.5±0.4(Fs_23.5-27.2Wo_42.9-44, n=15, FeO/MnO=29-35); calcic plagioclase, An_90.5±0.7(An_89.5-91.5, n=15)

Data from:
  MB104
  Table 0
  Line 0:

Place of purchase:	Erfoud, Morocco
Date:	P 2010
Mass (g):	326
Pieces:	Many
Class:	Eucrite-br
Shock stage:	high
Weathering grade:	low
Classifier:	A. Greshake, MNB
Type spec mass (g):	20
Type spec location:	MNB
Main mass:	Marcin Cimala
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full

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Photos:

Credit	Photos
Photos uploaded by members of the Encyclopedia of Meteorites. (Caution, these are of unknown reliability)
Denis gourgues
Ryan Upchurch
Wojciech Moscinski

Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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