0.85g Martian Meteorite Shergottite Olivine Phyric I Amgala 001

Top Meteorite

$440.00

On Offer: 0.85 gram Martian meteorite. This is an exceptional specimen of the olivine-phyric shergottite, Amgala 001. This martian meteorite is known to contain olivine phenocrysts. These are olivine crystals that are significantly larger than the rest of the meteorite's crystal grains, which for Amgala 001 are usually hi-CA prismatic pyroxenes. The olivine phenocrysts in this martin meteorite have been reported as large as 2mm.

Class: Martian Meteorite

Subclass: Shergottite

Official name: Amgala 001

Description: An amazing 0.85 gram Amgala 001 martian meteorite individual.

This is a martian meteorite, ejected by an impact on the surface of Mars with sufficient force to send ejecta out of Mar's gravity well, and ultimately to Earth.

What you get: 0.85 gram Amgala 001 Martian meteorite individual as shown, membrane storage/display box, signed Certificate of Authenticity

I offer a 100% no questions asked 30 day return policy.

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Amgala 001

Basic information

Name: Amgala 001
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2022
Country: Western Sahara
Mass: 34.67 kg

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	Martian (shergottite)
Recommended:			Martian (shergottite)

This is 1 of 318 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite).

Comments:

Approved 30 Jul 2023

Writeup:

Writeup from MB 112:

Amgala 001 26.014°N, 11.020°W

Saguia el Hamra, Western Sahara

Purchased: 2022 Dec

Classification: Martian meteorite (Shergottite)

History: Multiple stones were found together in December 2022 near Meharrize. Said Muftah Bachir and Ziyao Wang bought 12 kg together from the finders, including the largest 5200 g individual; Mark Lyon acquired 19165 g from two different dealers; Aziz Habibi obtained 3500 g from another dealer.

Physical characteristics: Weathered exterior surfaces of the stones are brown with a distinctive knobby appearance. Fresh interiors are greenish-gray with darker olivine phenocrysts visible.

Petrography: (A. Irving, UWS, and P. Carpenter, WUSL) Zoned olivine phenocrysts (up to 2 mm in length) are set in a groundmass with variable grainsize composed predominantly of prismatic, zoned clinopyroxene and lath-like maskelynite, together with accessory alkali feldspar, pyrrhotite, ulvöspinel, chromite (with variable Ti content), ilmenite, baddeleyite and chlorapatite. Thin opaque shock veins crosscut the specimen as well as secondary calcite veinlets. Olivine phenocrysts contain small patches of alteration products (red-brown in thin section).

Geochemistry: Olivine (Fa_31.7-56.6, FeO/MnO = 52-55, N = 5), pigeonite (Fs_27.7-48.4Wo_10.4-9.8, FeO/MnO = 29-35, N = 3), subcalcic augite (Fs_20.7-30.4Wo_32.5-34.6, FeO/MnO = 28-32, N = 2), maskelynite (An_47.4-50.5Or_2.2-1.7, N = 2), alkali feldspar (Ab_49.4Or_34.0An_16.7).

Classification: Shergottite (olivine-phyric).

Specimens: 68.3 g including one polished thin section at UWB; remainder with Mr. S. Bachir/WangZ (12 kg), Mr. M. Lyon (19165 g) and Mr. A. Habibi (3500 g).

Data from:
  MB112
  Table 0
  Line 0:

State/Prov/County:	Saguia el Hamra
Place of purchase:	Algeria and Morocco
Date:	P 2022 Dec
Latitude:	26.014°N
Longitude:	11.020°W
Mass (g):	34665
Pieces:	many
Class:	Martian (shergottite)
Shock stage:	high
Weathering grade:	low
Fayalite (mol%):	31.7-56.6
Ferrosilite (mol%):	27.7-48.4; 20.7-30.4
Wollastonite (mol%):	8.0-10.4; 32.5-34.6
Classifier:	(A. Irving, UWS, and P. Carpenter, WUSL)
Type spec mass (g):	68.3
Type spec location:	UWB

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