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Northwest Africa 12577
Basic information Name: Northwest Africa 12577
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12577
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1085 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  L4
Recommended:  L4    [explanation]

This is 1 of 2000 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 12 Apr 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12577 (NWA 12577)

(Northwest Africa)

Purchased: 2018 Sep

Classification: Ordinary chondrite (L4)

Petrography: (K. Metzler, IfP) Ordinary chondrite consisting of well-preserved chondrules of all main chondrule types, (mostly oxidized) metal, and small amounts (~10 vol%) of interchondrule matrix.

Geochemistry: Mineral compositions and geochemistry: The mean olivine composition is Fa23.0±0.3 (Fa22.1-23.6; n=16). The mean low-Ca pyroxene composition is Fs18.6±3.8Wo1.5±1.1 (Fs12.0-28.5Wo0.5-3.8; n=14).

Classification: L chondrite based on olivine chemistry. Petrologic type 4 based on the equilibrated state of olivine and unequilibrated state of low-Ca pyroxene.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018 Sep
Mass (g):1085
Pieces:1
Class:L4
Shock stage:S1
Weathering grade:W3
Fayalite (mol%):23.0±0.3
Ferrosilite (mol%):18.6±3.8
Wollastonite (mol%):1.5±1.1
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Mirko Graul, Bernau, Germany
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections		 IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Solar Anamnesis      
Geography: 
Coordinates:Unknown.

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

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