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Northwest Africa 11572
Basic information Name: Northwest Africa 11572
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11572
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 898 g
Meteoritical Bulletin:  MB 107  (2018)  H4-melt breccia
Recommended:  H4-melt breccia    [explanation]

This is 1 of 8 approved meteorites (plus 1 unapproved name) classified as H4-melt breccia.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 16 Jan 2018
Writeup from MB 107:

Northwest Africa 11572 (NWA 11572)

(Northwest Africa)

Purchased: March 2017

Classification: Ordinary chondrite (H4, melt breccia)

History: Purchased by Sean Tutorow and Brahim Tahiri from several diferent meteorite hunters in Morocco.

Petrography: The rock is an impact-melt breccia. Melted regions are very dark; they contain numerous metal-sulfide veins, polycrystalline troilite and rare cellular, rapidly cooled metal-sulfide assemblages. There are rare grains of coarse troilite. Most metal grains are not attached to sulfide grains. Some low-Ca pyroxene grains exhibit polysynthetic twinning, perhaps caused by post-shock quenching. There is strong mosaic extinction evident in the olivine grains.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P March 2017
Mass (g):897.52
Class:H4-melt breccia
Shock stage:S5
Weathering grade:W1
Fayalite (mol%):17.5±0.8 (n=8)
Ferrosilite (mol%):16.0±0.6 (n=5)
Wollastonite (mol%):0.7±0.2 (n=5)
Classifier:A. Rubin, UCLA
Type spec mass (g):28.89
Type spec location:UCLA
Main mass:Sean Tutorow
Comments:Submitted by Alan Rubin
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
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     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)
Synonymshelp: Northwest Africa 12602 (NWA 12602 is the same meteorite as NWA 11572)
NWA 12602 (NWA 12602 is the same meteorite as NWA 11572)

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