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Northwest Africa 13098
Basic information Name: Northwest Africa 13098
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13098
Observed fall: No
Year found: 2014
Country: Morocco
Mass:help 218 g
Recommended:  H5    [explanation]

This is 1 of 10308 approved meteorites (plus 45 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 18 Jan 2020
Writeup from MB 109:

Northwest Africa 13098 (NWA 13098)


Purchased: 2014 Feb

Classification: Ordinary chondrite (H5)

History: Purchased from a Moroccan dealer in 2014

Physical characteristics: Physical Charateristics: Single rough stone, has a black fusion crust. Saw cut reveals a red and brown interior with abundant specks of metals and sulfides.

Petrography: (K. Van Atta, T. Elliott, M. Trinh) Microprobe examination of a polished mount shows a few portions recrystallized, high amounts of metal and sulfides. Numerous plagioclase graints, 20-70 μm, in the matrix. Large, oxidized, kamacite and taenite grains are common and are connected by a widespread set of complex, convoluted, small metal veins incoporating numerous small silicate inclusions. A few larger pools of plagioclase composition are also observed, which contain densely concentrated small crystals of chromite and metal. Kamacite is highly oxidized and troilite is also partly altered. Large chromite and merrillite, and some chlorapatite, also present.

Geochemistry: Mineral compositions and geochemistry: (K. Van Atta, T. Elliott, M. Trinh) Olivine Fa19.1±0.3, Fe/Mn=36.1 ±1.6, n=10; low-Ca pyroxene Fs16.9±0.3Wo1.8±0.05, Fe/ Mn=22.6 ±1.3, n=10; Kamacite Fe=91.86±0.13, Ni=6.75±0.20, Co=0.49±0.05 wt%, n=10.

Classification: Ordinary Chondrite (H5), weathering grade (W3)

Specimens: 32.6 g and an epoxy probe mount on deposit at UAz. Fredric Stephan holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2014 Feb
Mass (g):218.2
Weathering grade:W3
Fayalite (mol%):19.1±0.3
Ferrosilite (mol%):16.9±0.3
Wollastonite (mol%):1.76±0.05
Classifier:K. Van Atta, T. Elliott, M. Trinh, UAz
Type spec mass (g):32.6
Type spec location:UAz
Main mass:Fredric Stephan
Comments:Working name SH14; submitted by T. Swindle
   and collections
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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