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Northwest Africa 15469
Basic information Name: Northwest Africa 15469
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15469
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 288 g
Classification
  history:
Recommended:  LL7    [explanation]

This is 1 of 89 approved meteorites classified as LL7.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 7 Jan 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15469 (NWA 15469)

(Northwest Africa)

Purchased: 2022

Classification: Ordinary chondrite (LL7)

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

Physical characteristics: Two dark grayish fragments with some fusion crust.

Petrography: The meteorite displays a microporphyritic texture of predominantly 30-100 µm sized often euhedral olivine, weakly zoned low-Ca pyroxene with calcic margins, and augite grains together with interstitial albitic feldspar. Occasionally, pyroxene poikilitically encloses round olivine grains. Opaque phases are mostly altered sulfides and rare FeNi metal. No relict chondrules detected.

Geochemistry: olivine: Fa28.7±0.1 (Fa28.6-28.8, n=10); zoned low-Ca pyroxene: Fs22.3±0.5Wo4.0±2.1 (Fs21.6-23.8Wo2.0-7.1, n=17); Ca-pyroxene: Fs14.2±0.8Wo34.9±2.0 (Fs13.4-15.3Wo31.7-37.1, n=5); feldspar: An10.1±1.0Ab85.7±0.6Or4.2±0.8, n=5

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):288
Pieces:2
Class:LL7
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):28.7
Ferrosilite (mol%):22.3; 14.2
Wollastonite (mol%):4.0; 34.9
Classifier:A. Greshake, MNB
Type spec mass (g):22.3
Type spec location:MNB
Main mass:Boulaouane Taleb Ahmed
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. 111, in preparation (2023)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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