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Northwest Africa 10729
Basic information Name: Northwest Africa 10729
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10729
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 72.4 g
Meteoritical Bulletin:  MB 105  (2016)  LL3-6
Recommended:  LL3-6    [explanation]

This is 1 of 33 approved meteorites classified as LL3-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 28 Jun 2016
Writeup from MB 105:

Northwest Africa 10729 (NWA 10729)

(Northwest Africa)

Purchased: 2016

Classification: Ordinary chondrite (LL3-6)

History: One 72.4 g meteorite found in Morocco in 2016. David Holden acquired the sample from a meteorite prospector in Erfoud 2016.

Physical characteristics: The oriented stone, with rollover lipping, is roughly rectangular and ~80% covered with a dark brown weathered fusion crust. The stone exhibits several broad shallow regmaglypts.

Petrography: (A. Love, App): Sample is a breccia composed of distinct, white recrystallized clasts, fragments of chondrules and shock-darkened and shock-melted fragments set within a gray-colored host of distinct chondrules with turbid mesostasis, indistinct chondrules with recrystallized mesostasis and fragments that have an average diameter of 566 μm (n=84). Metal appears more abundant within host (~3 vol%) as compared to clasts (~2 vol%). Recrystallized clasts lack relict chondrules.

Geochemistry: (A. Love, App) Olivine: host Fa23.6±9.8 (1.3-34.8), N=16; recrystallized clasts Fa29.2±0.3, N=3; low Ca pyroxene: host Fs17.8±6.4Wo2.5±2.4 (Fs7.9-26.0, N=11); clasts Fs29.2±0.3Wo2.7±0.2, N=3.

Classification: Ordinary chondrite (LL3-6, S3, W1). Mineral compositions and metal abundance suggest this is an LL chondrite. Poorly equilibrated compositions of olivine and pyroxene coupled with textures of equilibrated chondrules within host, suggest host is composed of a mixture of type 3 and higher petrologic grades of materials. Textures and equilibrated compositions within clasts suggest clasts are LL6.

Specimens: One polished thin section and a 14.5 g type specimen are on deposit at App. David Holden holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):72.4
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):23.6±9.8; 29.7±0.3
Ferrosilite (mol%):17.8±6.4; 23.1±0.2
Wollastonite (mol%):2.5±2.4; 2.7±0.2
Classifier:A. Love, App
Type spec mass (g):14.5
Type spec location:App
Main mass:David Holden
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)
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 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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