Meteoritical Bulletin: Entry for Northwest Africa 11597

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Northwest Africa 11597

Basic information

Name: Northwest Africa 11597
This is an OFFICIAL meteorite name.
Abbreviation: NWA 11597
Observed fall: No
Year found: 2016
Country: Algeria
Mass: 34.7 g

Classification
history:

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

This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 9 Feb 2018

Writeup

help

Writeup from MB 107:

Northwest Africa 11597 (NWA 11597)

Algeria

Purchased: 2016 May 1

Classification: HED achondrite (Eucrite)

History: Purchased by Miao Bing-an in 2016 in Morocco.

Physical characteristics: The interior of the meteorite is medium gray. Dimensions: 2.5 × 3.0 × 3.4 cm.

Petrography (L. Huang, B. Miao, H. Chen, GUT): Breccia containing a variety of basaltic lithologies, with <10 vol% cumulate lithologies. Cumulate eucrites lithologies are coarse grained (~0.3-0.6 mm) gabbros composed principally of low-Ca clinopyroxene and calcic plagioclase. Basaltic breccia lithologies are fine grained, and have textures that are mostly subophitic. A silica phase is commonly present. Accessories are ilmenite, chromite and troilite.

Geochemistry (L. Huang, B. Miao, H. Chen, GUT): Bulk pyroxene: Fe/Mn=35.5. Low-Ca pyroxene of cumulate lithologies: median compositions are Mg#=45.1, Fs_52.3Wo_2.9(n=10). Low-Ca pyroxene of basaltic lithologies: median compositions are Mg#=40.8, Fs_57.2Wo_3.7(n=8). High-Ca pyroxene of basaltic lithologies: median compositions are Mg#=43.2, Fs_46.6Wo_18.6(n=21). Plagioclase: An_90.0-91.9Or_0.5-0.7, median An_91.9Or_0.7(n=6).

Classification: Basaltic polymict brecciated eucrite

Specimens: 11.1 g and polished thin section are deposited in GUT

Data from:
  MB107
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2016 May 1
Mass (g):	34.74
Pieces:	1
Class:	Eucrite
Classifier:	B. Miao, L.Huang, H. Chen, GUT
Type spec mass (g):	11.1
Type spec location:	GUT
Main mass:	GUT
Comments:	Submitted by Bingkui Miao

Institutions
and collections

GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)

Catalogs:

References:

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

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Photos:

Credit	Photos
Public domain photographs:
Zhipeng Xia

Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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