08866 - Extremely Rare NWA 12879 Angrite Achondrite Meteorite Thin Section 0,346g

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08866 - Extremely Rare NWA 12879 Angrite Achondrite Meteorite Thin Section 0,346g

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Species

NWA 12879 Angrite Achondrite Meteorite

Age

Location

Fell in South Morocco - Northwest Africa

Formation

Two potential parent bodies have been identified: 289 Nenetta and 3819 Robinson.

Size

12.5 mm • in

Weight

0.346 g • oz

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Description

NWA 12879 Angrite thin section 0,346g

APPROVED THE PAST AND RECENT October 6 / 2019. The main mass is owned by Said Yousfii (IMCA 2973), and I have the rest (IMCA 5681).

Only 11 g the main mass.

Enjoy this rarity. FRESH CLASSIFICATION.

Guaranteed by IMCA (International Meteorite Collectors Association) member 5681, the Geologist Juan Avilés Poblador

Northwest Africa 12879

Basic information

Name: Northwest Africa 12879
This is an OFFICIAL meteorite name.
Abbreviation: NWA 12879
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 11 g

Classification
history:

Recommended:

Angrite [explanation]

This is 1 of 33 approved meteorites classified as Angrite. [show all]
Search for other: Achondrites, Angrites

Comments:

Approved 6 Oct 2019

Writeup

Writeup from MB 108:

Northwest Africa 12879 (NWA 12879)

(Northwest Africa)

Purchased: 2019

Classification: Angrite

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Many small dark brownish fragments without fusion crust.

Petrography: The meteorite exhibits a subophitic texture of lath-shaped up to 200 µm sized anorthite, Al-Ti-augite, and Ca-rich olivine. Pyroxene and olivine show strong compositional zoning, which in case of olivine can be reverse. Several olivine grains are overgrown by kirschsteinite. Minor phases include titanomagnetite, troilite, kuratite, and silicoapatite.

Geochemistry: olivine: Fa_65.1±20.9Ln9.5±6.8 (Fa_15.6-84.9Ln0.4-21.2, FeO/MnO=86±12, n=36); clinopyroxene: Fs_33.2±12.1Wo_51.9±0.9(Fs_19.9-49.5Wo_49.9-53.1, FeO/MnO=110±26, TiO₂ = 2.2±0.9 wt%, Al₂O₃ = 7.6±1.1 wt%, n=22); kirschsteinite: Fa_60.1±1.8Ln36.1±1.4 (Fa_57.7-63.4Ln33.1-38.0, FeO/MnO=70±4, n=11); anorthite: An_99.6±0.2(An_99.1-99.8, n=11)

Data from:
  MB108
  Table 0
  Line 0:

Place of purchase:	Morocco
Date:	P 2019
Mass (g):	11
Pieces:	many
Class:	Angrite
Shock stage:	low
Weathering grade:	low
Fayalite (mol%):	65.1; 60.1
Ferrosilite (mol%):	33.2
Wollastonite (mol%):	51.9
Classifier:	A. Greshake, MNB
Type spec mass (g):	2.2
Type spec location:	MNB
Main mass:	Said Yousfi
Comments:	Submitted by Ansgar Greshake

Institutions
and collections

MNB: Museum für Naturkunde, Invalidenstrasse 43, D-10115 Berlin, Germany (institutional address)

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