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Northwest Africa 7778
Basic information Name: Northwest Africa 7778
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7778
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 236 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  LL4-6
Recommended:  LL4-6    [explanation]

This is 1 of 67 approved meteorites classified as LL4-6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Apr 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7778 (NWA 7778)

Morocco

Purchased: 2012

Classification: Ordinary chondrite (LL4-6)

History: Purchased by Sean Tutorow from a Moroccan meteorite dealer, 2012.

Physical characteristics: Two fusion crusted pieces that fit together. Interior shows a brecciated texture with dark and light clasts.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows two distinct lithologies corresponding to petrologic types 4 and 6. PO, POP chondrules are present in the type 4 lithology and whereas the type 6 lithology has indistinct chondrules. Ubiquitous plagioclase, troilite, kamacite, and chromite in both lithologies, Cl-rich apatite present only in type 6.

Geochemistry: (C. Agee and L. Burkemper, UNM) Clast type 6: Olivine Fa28.7±0.9, Fe/Mn=56±4, n=7; low-Ca pyroxene Fs24.1±0.6Wo1.8±0.4, Fe/Mn=35±2, n=6; Clast type 4: Olivine Fa30.2±2.1, Fe/Mn=62±5, n=7; low-Ca pyroxene Fs23.4±1.0Wo1.8±0.2, Fe/Mn=35±2, n=7.

Classification: Ordinary chondrite (LL4-6), breccia of type 4 and type 6 components, weathering grade W1.

Specimens: 20.4 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  MB102
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2012
Mass (g):235.8
Pieces:2
Class:LL4-6
Weathering grade:W1
Fayalite (mol%):28.7±0.9, 30.2±2.1
Ferrosilite (mol%):24.1±0.6, 23.4±1.0
Wollastonite (mol%):1.8±0.4, 1.8±0.2
Classifier:C. Agee, UNM
Type spec mass (g):20.4
Type spec location:UNM
Main mass:Sean Tutorow
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:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1466 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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