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Northwest Africa 7607
Basic information Name: Northwest Africa 7607
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7607
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 111 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL3.4
Recommended:  LL3.4    [explanation]

This is 1 of 24 approved meteorites classified as LL3.4.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 28 Jan 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7607 (NWA 7607)

Morocco

Purchased: Aug 2012

Classification: Ordinary chondrite (LL3.4)

History: Purchased by Adam Bates from a meteorite dealer in Morocco, August 2012.

Physical characteristics: Single stone, weathered fusion crust, chondrules visible through surface patina, saw-cut reveals fine-grained metal, many mm-sized chondrules, some up to 3 mm, average 700 μm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous unequilibrated POP, PO, RP chondrules, most with albitic mesostasis or glass, average chondrule size ~700 μm. Scattered troilite, kamacite, taenite, minor Fe-Ni sulfide; metal is ~50% oxidized.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa23.2±11.6, Fe/Mn=75±13, n=31; low-Ca pyroxene Fs14.7±8.3Wo1.5±1.7, Fe/Mn=26±13, n=30.

Classification: Ordinary chondrite (LL3.4), weathering grade W2.

Specimens: 21 g including a probe mount on deposit at UNM, Adam Bates holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Aug 2012
Mass (g):111
Pieces:1
Class:LL3.4
Weathering grade:W2
Fayalite (mol%):23.2±11.6
Ferrosilite (mol%):14.7±8.3
Wollastonite (mol%):1.5±1.7
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Adam Bates
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1386 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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