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Northwest Africa 10486
Basic information Name: Northwest Africa 10486
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10486
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 42.5 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H3-5
Recommended:  H3-5    [explanation]

This is 1 of 78 approved meteorites classified as H3-5.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 24 Jan 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10486 (NWA 10486)

(Northwest Africa)

Purchased: 2010

Classification: Ordinary chondrite (H3-5)

History: One stone weighing 42.5 g was found in Morocco in 2010. David Holden acquired the sample from a meteorite prospector in Erfoud 2010.

Physical characteristics: The stone is dark brown and has a rounded-irregular shape. The stone is covered by a weathered patina. The cut face of the interior of the stone is orange in color and displays small chondrules, chondrule fragments, and unweathered flakes of metal.

Petrography: Description and classification (A. Love, App): Sample is a breccia composed of recrystallized and shock-darkened clasts set within a host of well-defined chondrules and fragments included in a fragmental matrix of clastic debris. Host chondrules are well-defined, have turbid mesostasis and have an average diameter of 420 μm. The recrystallized clast is composed of indistinct chondrules and chondrule fragments set within a yellow-stained, recrystallized matrix. The shocked clast contains rounded and flattened chondrules and is crosscut by a series of subparallel fractures.

Geochemistry: (A. Love, App) Host: Olivine Fa14.2±9.1 (Fa0.7-27.7) N=17; Low Ca pyroxene Fs12.1±5.2Wo1.3±0.6 (Fs4.2-17.7Wo0.3-2.5), N=13, Equilibrated clasts: Olivine Fa17.9±0.5, N=2; low-Ca Pyroxene Fs 16.5±0.1Wo 1.7±0.1, N=2.

Classification: Based on textures and mineral compositions, sample is an H3-5, S3, W2. Based on compositions of Type I chondrules and CL signature of chondrule mesostasis (Huss et al., 2006), unequilibrated host falls between petrologic type 3.5-3.7.

Specimens: An endcut and two slices weighing 8.54 g, and a polished thin section are currently on deposit at App.

Bibliography:
  • Huss, G.R., Rubin, A.E. and Grossman, J.N. (2006) Thermal Metamorphism in Chondrites. in Meteorites and the Early Solar System II, D.S. Lauretta and H.Y. McSween Jr. (eds.), University of Arizona Press, Tucson, 943 pp., 567-586. (link)
Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2010
Mass (g):42.5
Pieces:1
Class:H3-5
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):14.2±9.1 (N=17); 17.9±0.5 (N=2)
Ferrosilite (mol%):12.1±5.2 (N=13); 16.5±0.1 (N=2)
Wollastonite (mol%):1.3±0.6 (N=13); 1.7±0.1 (N=2)
Classifier:A. Love, App
Type spec mass (g):8.54
Type spec location:App
Main mass:David Holden
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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