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Northwest Africa 12432
Basic information Name: Northwest Africa 12432
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12432
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 253 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  H5
Recommended:  H5    [explanation]

This is 1 of 10209 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Jan 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12432 (NWA 12432)

(Northwest Africa)

Purchased: 12 Dec 2016

Classification: Ordinary chondrite (H5)

Physical characteristics: Exterior surfaces are dark brown; interior cut faces are medium-to-dark brown, with numerous lighter brown chondrules visible.

Petrography: (M. Hutson, A. Ruzicka, Cascadia) Extensive veins of iron hydroxides cut across the thin section, cross-cutting chondrules and causing the material between chondrules to be opaque in transmitted light.

Geochemistry: Mineral compositions and geochemistry: (M. Hutson, R. Kostynick, A. Ruzicka, Cascadia) Olivine (Fa18.3±0.2, N=26; low-Ca pyroxene (Fs16.3±0.2Wo1.3±0.2, N=26).

Classification: H5 based on iron contents in olivine and pyroxene.

Specimens: Cascadia holds 47.2 g in three pieces, in addition to a polished thin section and a mounted butt.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Ebay
Date:P 12 Dec 2016
Mass (g):253.2
Pieces:1
Class:H5
Weathering grade:W3
Fayalite (mol%):18.3±0.2
Ferrosilite (mol%):16.3±0.2
Wollastonite (mol%):1.3±0.2
Classifier:M. Hutson, R. Kostynick, A. Ruzicka, Cascadia
Type spec mass (g):47.2
Type spec location:Cascadia
Main mass:Bastien Baecker, Huntsville
Comments:Lab number CML 0941; submitted by Alex Ruzicka
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

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