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Meteorite Thin Section - CR2 | NWA 801 Carbonaceous Chondrite

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  • $ 90.00

On Offer: Thin Section of CR2 - NWA 801
Type: CR2 Carbonaceous Chondrite
Official name: NWA 801
Description: High quality thin section of NWA 801 CR2  Carbonaceous Chondrite.
What you get: Thin Section of NWA 801 (exact slide as shown) & individual hard plastic 2pc. clear protective storage case.
I offer a 100% no questions asked 30 day return policy.  
ID - THIN20170005
Northwest Africa 801
Basic information Name: Northwest Africa 801
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 801 
Observed fall: No
Year found: 2001
Country: (Northwest Africa) 
Mass:help 5 kg
Meteoritical Bulletin:   MB 92   (2007)   CR2
Recommended:   CR2    [explanation]

This is 1 of 159 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 24 Jul 2007
Writeup from MB 92: 

Northwest Africa 801


Find: 2001

Carbonaceous chondrite (CR2)

History: M. Farmer and G. Hupe recovered a total of approximately 5 kg of many individuals and fragments from Zagora, Morocco. Many whole and sliced specimens have been sold over the last several years.

Physical characteristics: Many whole stones and fragments, all with desert varnish and brown/orange color. Numerous chondrules, many on the order of ~ 1 mm in apparent diameter, are visible.

Petrography: (G. Benedix and C. Smith, NHM) The thin section studied is dominated by millimeter-sized Type I PO and POP chondrules, which are often rimmed with and/or contain metallic Fe-Ni blebs. Metallic Fe-Ni also occurs as rounded, millimeter-sized grains within the matrix. Interstitial to chondrules and metal is a fine-grained matrix rich in phyllosilicate.Two Type II chondrules were also observed. Pervasive veins of rust occur throughout.

Mineral compositions: Type 1 chondrule olivine (Fo98.2±1.3), low-Ca pyroxene (En96.2±0.9Wo2.0±2.2), high-Ca pyroxene(En45.7±11.5 Wo35.9±4.7). Type II chondrule olivine (Fo77.4±7.7), low-Ca pyroxene (En73.8±1.8Wo2.1±2.4).

Classification:Carbonaceous chondrite (CR2); moderate to extensive weathering.

Type specimens: A total of 77.4 g of sample and two sections are on deposit at NHM. MFarmer holds several grams, KCCU holds approximately 10 g, AMNH hold several grams.

Data from:
  Table 2
  Line 1:
Place of purchase: Zagora, Morocco
Date: 2001
Mass (g): 5000
Pieces: Many
Class: CR2
Type spec mass (g): 77.4
   and collections
AMNH: Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West, New York, NY 10024, United States (institutional address; updated 18 May 2013)
KCCU: Kingsborough College of the City University of New York, Brooklyn, NY 11235, United States (institutional address; updated 28 Dec 2011)
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address)
Hupe: (old address—now see GHupé or AHupé) G. and A. Hupe, 2616 Lake Youngs Court SE, Renton, WA 98058., United States (private address)

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