Meteoritical Bulletin: Entry for Northwest Africa 13735

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Northwest Africa 13735

Basic information

Name: Northwest Africa 13735
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13735
Observed fall: No
Year found: 2019
Country: Algeria
Mass: 3.6 kg

Classification
history:

Meteoritical Bulletin:	MB 110	(2022)	Winonaite
Recommended:			Winonaite [explanation]

This is 1 of 90 approved meteorites classified as Winonaite. [show all]
Search for other: Primitive achondrites, Winonaites

Comments:

Approved 13 Mar 2021

Writeup

help

Writeup from MB 110:

Northwest Africa 13735 (NWA 13735)

Algeria

Purchased: Nov. 2019

Classification: Primitive achondrite (Winonaite)

History: Purchased by Bo Zhang in Nov. 2019 from an anonymous dealer.

Physical characteristics: Three brown stones partly covered with fusion crust and some metal-veined. The main mass is 2.3 kg, the other two pieces are 774 and 510 g.

Petrography: The rock displays a recrystallized texture with frequent 120 degree triple junctions. It is mainly composed of forsterite, diopside, enstatite, plagioclase with accessory troilite and kamacite. Grain sizes of silicates typically range from 50 to 300 µm.

Geochemistry: olivine: Fa_4.3±0.2(FeO/MnO=25±3, n=15); low-Ca pyroxene: Fs_4.8±0.2Wo_1.8±0.1(FeO/MnO=17±1, n=15); Ca-pyroxene: Fs_1.9±0.3Wo_44.8±0.3(FeO/MnO=17±7, n=5); feldspar: An_21.4±2.4Ab_75.7±2.1Or_2.9±0.3, n=8). Oxygen isotope (Bao Huiming, LSU): δ¹⁸O=4.742, δ¹⁷O= 1.974, Δ¹⁷O= -0.537

Classification: Winonaite

Data from:
  MB110
  Table 0
  Line 0:

Place of purchase:	Mauritania
Date:	P Nov. 2019
Mass (g):	3600
Pieces:	3
Class:	Winonaite
Shock stage:	S1
Weathering grade:	Moderate
Fayalite (mol%):	4.3±0.2 (n=15)
Ferrosilite (mol%):	4.8±0.2 (n=15);1.9±0.3 (n=5)
Wollastonite (mol%):	1.8±0.1 (n=15);44.8±0.3 (n=5)
Classifier:	Li Y., PMO
Type spec mass (g):	20
Type spec location:	PMO
Main mass:	Bo Zhang
Comments:	Submitted by Hsu W.

Plots:

O isotopes:

Institutions
and collections

PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011)

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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Photos:

Credit	Photos
Public domain photographs:
Weibiao Hsu

Geography:

Algeria

Algeria

Coordinates:

Unknown.

Statistics:
This is 1 of 1402 approved meteorites from Algeria (plus 33 unapproved names) (plus 4 impact craters)

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