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Northwest Africa 15985
Basic information Name: Northwest Africa 15985
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15985
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 7.6 g
Classification
  history:
Recommended:  H4-melt breccia    [explanation]

This is 1 of 11 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 30 Jul 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15985 (NWA 15985)

(Northwest Africa)

Purchased: 5 September 2022

Classification: Ordinary chondrite (H4, melt breccia)

History: Purchased online by Mikey Boland on Septermber 5th, 2022.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample has two observable lithologies: Lith 1) an equilibrated ordinary chondrite containing accessory Fe-Ni metal, troilite, and chromite; Lith 2) A melt breccia comprised of Lith 1 fragments set within a melt rock matrix.

Geochemistry: Olivine (Fa18.6±0.5, range Fa17.6-19.6, n=24), Low-Ca Pyroxene (Fs16.5±0.4Wo1.7±0.1, range Fs15.2-17.0Wo1.5-1.9, n=20).

Classification: Ordinary chondrite (H4, melt breccia).

Specimens: 1.85 g at Cascadia, main mass with Mikey Boland.

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Online
Date:P 5 September 2022
Mass (g):7.63
Pieces:14
Class:H4-melt breccia
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):18.6±0.5
Ferrosilite (mol%):16.5±0.4
Wollastonite (mol%):1.7±0.1
Classifier:D. Sheikh, Cascadia
Type spec mass (g):1.85
Type spec location:Cascadia
Main mass:Mikey Boland
Comments:CML 1620; submitted by Daniel Sheikh
Institutions
   and collections		 Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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