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Den uendelige opdagelse af meteoritter, bragt til dig af {name}

Francesco Moser

NWA 15027 
Mesosiderite breccia meteorite 
Found in January 2022 in Niger.
37 Grams 

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Official classification data source:

Northwest Africa 15027
Basic information	Name: Northwest Africa 15027
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15027
Observed fall: No
Year found: 2022
Country: Niger
Mass: 985 g
Classification8			Mesosiderite


Comments:	Approved 4 Mar 2023
Writeup	
Writeup from MB 112:
Northwest Africa 15027 (NWA 15027)

Niger

Purchased: 2022 Jan

Classification: Mesosiderite

History: Found in Niger and in January 2022.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) This specimen is a heterogeneous breccia containing sporadic larger, polygranular aggregates of olivine (up to 7 by 8 mm in size) and smaller clasts of anorthite in a matrix composed in some places of intergrown orthopyroxene and anorthite with minor silica polymorph and in other places composed of intergrown metal and orthopyroxene. Kamacite (typically altered to Fe oxides) is distributed irregularly. The original metal content is estimated to ~40 vol%. Accessory phases include troilite, Al-Mg-rich chromite and merrillite. Cross-cutting veinlets of secondary Fe hydroxides are present.

Geochemistry: Orthopyroxene (Fs28.0-28.8Wo1.5-2.1; Fs35.4-36.1Wo3.2-3.5; FeO/MnO = 26-29; N = 4), olivine (Fa27.2-30.1, FeO/MnO = 41-43, N = 6), anorthite (An90.2-93.6Or0.2, N = 3).

Classification: Mesosiderite (breccia).

Data from:
MB112
Table 0
Line 0:	
Place of purchase:	Niger
Date:	P 2022 Jan
Mass (g):	985
Pieces:	many
Class:	Mesosiderite
Shock stage:	low
Weathering grade:	moderate
Fayalite (mol%):	27.2-30.1
Ferrosilite (mol%):	28.0-36.1
Wollastonite (mol%):	1.5-3.4
Classifier:	A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):	23.0
Type spec location:	UWB

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