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Northwest Africa 14910
Basic information Name: Northwest Africa 14910
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14910
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 291 g
Meteoritical Bulletin:  MB 111  (2023)  H5
Recommended:  H5    [explanation]

This is 1 of 11988 approved meteorites (plus 23 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 9 May 2022
Writeup from MB 111:

Northwest Africa 14910 (NWA 14910)

(Northwest Africa)

Purchased: 2007

Classification: Ordinary chondrite (H5)

Physical characteristics: Physical Characteristics: Physical Characteristics: CML received a tapered slice about 8 mm in thickness, with a smaller face (~4 × 3 cm in area) coated in epoxy, and a larger uncoated face (~5 × 3 cm in area). Both faces show a predominantly light-colored host lithology with indistinct chondrules as well as two darker-colored, fine grained regions that lack obvious chondrules and that contain metal-sulfide globules. The dark fine-grained regions occupy ~60 area percent in the smaller face and ~20 area percent in the larger one. The light and dark lithologies are separated by irregularly-shaped reflective veins (now mainly weathering product).

Petrography: (M. Hutson, A. Ruzicka, Cascadia): Two lithologies are visible in thin section that correspond to the light and dark lithologies observed in hand specimen. The host lithology shows abundant chondrules and remnant metal and troilite grains, with extensive veins composed of hydrated Fe oxides. All of the large olivine grains examined for deformation features have undulose extinction, with a majority having planar fractures, consistent with a weakly shocked (S3) chondrite. The dark lithology contains large (50-200 μm across) zoned olivine grains set in a fine-grained matrix composed of glass and crystallites. Rounded metal-sulfide globules have a cellular texture similar to that found in rapidly cooled melts. A concentration of metal and weathered metal occurs at the contact between the host lithology and the melt lithology.

Geochemistry: Host olivine: Fa18.3±0.2, N=24; Host low-Ca pyroxene: Fs16.3±0.2Wo1.2±0.1, N=22. Olivine in melt lithology: Fa16.1±3.1, N=8.

Classification: Ordinary chondrite (H5) based on mineral chemistry and texture. The dark lithology is interpreted as a shock melt.

Specimens: Cascadia holds 25.9 g in one piece, as well as a polished thin section and material in an epoxy butt; Greg Carr holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:online
Date:P 2007
Mass (g):290.52
Weathering grade:W3
Fayalite (mol%):18.3±0.2 (N=24)
Ferrosilite (mol%):16.3±0.2 (N=22)
Wollastonite (mol%):1.2±0.1 (N=22)
Classifier:M. Hutson, N. Bintliff, D. Sheikh, and A. Ruzicka, Cascadia
Type spec mass (g):32.9
Type spec location:Cascadia
Main mass:Greg Carr
Comments:Lab number CML 0627, Greg Carr collection number M050.; submitted by Melinda Hutson
   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)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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