Meteoritical Bulletin: Entry for Northwest Africa 11552

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Northwest Africa 11552

Basic information

Name: Northwest Africa 11552
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11552
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass: 109.2 g

Classification
history:

Meteoritical Bulletin:	MB 107	(2018)	Eucrite
Recommended:			Eucrite [explanation]

This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 5 Jan 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11552 (NWA 11552)

(Northwest Africa)

Purchased: 2016 Nov 16

Classification: HED achondrite (Eucrite)

History: Donated to Cascadia in February, 2017 by Dr. Baecker, who had purchased the sample as an unclassified NWA on eBay.

Physical characteristics: Single oriented cone mostly covered by black fusion crust. Interior cut faces show clastic texture ranging from small fragments to sub-cm subophitic-textured clasts. Brownish rust spots visible.

Petrography: Clastic texture in thin section, including mineral, lithic, and melt breccia clasts. Relatively abundant calcite veining

Geochemistry: Most pyroxene analyses are mixtures of low- and high-Ca pyroxene. Low-Ca pyroxene Fs_66.1±1.7Wo_4.9±0.3(N=6); augite Fs_34.1±2.0Wo_39.4±2.4(N=9).

Classification: Monomict, largely equilibrated, brecciated eucrite based on texture and mineral composition.

Specimens: Cascadia holds 21.5 g, two polished thin sections, and potted butt. Main mass is held Dr. Bastian Baecker (Huntsville, AL)

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	internet
Date:	P 2016 Nov 16
Mass (g):	109.2
Pieces:	1
Class:	Eucrite
Weathering grade:	moderate
Ferrosilite (mol%):	66.1±1.7
Wollastonite (mol%):	4.9±0.3
Classifier:	M. Hutson, A. Ruzicka, Cascadia
Type spec mass (g):	21.5
Type spec location:	Cascadia
Main mass:	Bastian Baecker
Comments:	Lab number CML0943; submitted by A. Ruzicka

Institutions
and collections

Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462

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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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