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Northwest Africa 10552
Basic information Name: Northwest Africa 10552
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10552
Observed fall: No
Year found: 2001
Country: (Northwest Africa)
Mass:help 314 g
Meteoritical Bulletin:  MB 105  (2016)  H3-5
Recommended:  H3-5    [explanation]

This is 1 of 81 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 28 Feb 2016
Writeup from MB 105:

Northwest Africa 10552 (NWA 10552)

(Northwest Africa)

Find: 2000

Classification: Ordinary chondrite (H3-5)

History: 1 stone weighing 314 g was found near Morocco-Algeria border in 2000. Thomas Webb acquired the sample from a meteorite prospector in 2001.

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 dark in color and displays small chondrules, chondrule fragments, and unweathered flakes of metal.

Petrography: Recrystallized and shock-darkened clasts which are set within a host of well-defined, poorly equilibrated chondrules, fragments and clastic debris. Boundaries between clasts and host are obscured by shock-darkened regions within the meteorite. Host chondrules are distinct, have turbid mesostasis, and have an average diameter of 439 μm (n=130). The recrystallized clast is composed of indistinct chondrules and chondrule fragments set within a yellow-stained, recrystallized matrix.

Geochemistry: (A. Love, App) Host: Olivine Fa 18.2±8.6 (Fa0.9-31.6) N=18; Low Ca pyroxene Fs16.0±8.0Wo 1.3±0.6 (Fs3.5-31.5Wo0.3-2.5), N=12, Equilibrated clasts: Olivine Fa20.5±0.3, N=4; low-Ca Pyroxene Fs18.2±0.1Wo1.9±0.1, N=3.

Classification: Based on textural relationships using optical, CL and SEM microscope images and mineral compositions, this is an H3-5 S3 W3 ordinary chondrite breccia.

Specimens: 2 slices weighing 20.9 g and a polished thin section are on deposit at App.

Data from:
  Table 0
  Line 0:
Mass (g):314
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):18.2±8.6; 20.5±0.3
Ferrosilite (mol%):16.0±8.0; 18.2±0.1
Wollastonite (mol%):1.3±0.6; 1.9±0.1
Classifier:A. Love, App
Type spec mass (g):20.9
Type spec location:App
Main mass:TWebb
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
TWebb: No contact information provided., United States (private address)
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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     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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