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Northwest Africa 15297
Basic information Name: Northwest Africa 15297
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15297
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 48 g
Classification
  history:
Recommended:  R3-6    [explanation]

This is 1 of 32 approved meteorites classified as R3-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15297 (NWA 15297)

(Northwest Africa)

Purchased: 2022

Classification: Rumuruti chondrite (R3-6)

History: The meteorite was reportedly found 2021 in Algeria and subsequently purchased from a local meteorite dealer.

Physical characteristics: Many light grayish fragments with some patches of fusion crust.

Petrography: The meteorite displays a grayish interior and is composed of up to 1 mm sized mostly angular type 6 clasts in type 3 host lithology. In type 6 clasts, ferroan olivine, Ca-pyroxene, and sodic plagioclase are the predominant mineral phases. In the host lithology, chondrules have an average diameter of about 400 µm and the matrix abundance is ~40%; olivine and low-Ca pyroxene are compositionally unequilibrated. Opaques phases are sulfides and Ti-bearing chromite; no metal detected.

Geochemistry: type 3 lithology: olivine: Fa33.7±7.7 (Fa17.9-38.6, n=15); low-Ca pyroxene: Fs17.8±3.5Wo1.1±0.9 (Fs12.6-24.3Wo0.3-2.8, n=12); type 6 lithology: olivine: Fa37.9±0.4 (FeO/MnO=78±3, n=7); Ca-pyroxene: Fs10.1±0.9Wo45.0±1.2, n=7; feldspar: An10.0-12.1Ab85.2-87.2Or2.0-3.4, n=7

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2022
Mass (g):48
Pieces:many
Class:R3-6
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):33.7; 37.8
Ferrosilite (mol%):17.8; 10.1
Wollastonite (mol%):1.1; 45.0
Classifier:A. Greshake, MNB
Type spec mass (g):9.6
Type spec location:MNB
Main mass:Mateusz Szyszko
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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