header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Feb 2021
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 10310
Basic information Name: Northwest Africa 10310
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10310
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 136.8 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  L6
Recommended:  L6    [explanation]

This is 1 of 11485 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Sep 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 10310 (NWA 10310)

(Northwest Africa)

Purchased: April 2013

Classification: Ordinary chondrite (L6)

History: Purchased on-line as an NWA meteorite originally from a Moroccan dealer by John Shea in April 2013 and a portion subsequently donated to Cascadia.

Physical characteristics: Already cut individual with partial fusion crust. Sawed faces show chondritic texture with rust haloes around the metal.

Petrography: (M. Ream and A. Ruzicka, Cascadia) Large chondrules in this sample are somewhat readily recognized in thin section with transmitted light, but boundaries are indistinct and matrix is mostly transparent, and feldspar grain size is up to 100 μm across, consistent with petrographic type 6. The mean diameter of the recognizable chondrules (N = 20) is 0.9±0.4 mm. Contains about 4% metal + 6% troilite (+ minor weathering products). Olivine grains are mosaicized and most grains display 2 sets of planar fractures indicative of shock stage S4. Chromite-feldspar pods are also present. One unusual ~3-mm- diameter object is concentrically zoned with a fine-grained (10 – 30 μm) core of silica and metal, a mantle of low- and high-Ca pyroxene, and a ragged, 50 – 100 μm thick rim of feldspar ± chromite with 5 – 10 μm grains of troilite dispersed evenly throughout the object.

Geochemistry: Olivine, Fa 25.8±0.4(Fa25.4-26.8, N = 12); low-Ca pyroxene, Fs21.6±0.4Wo1.8±0.3 (Fs21.1-22.5, N = 9); high-Ca pyroxene, Fs8.6±2.2Wo 45.2±2.5 (Wo43.4-46.9, N = 2); feldspar, Ab84.8±4.2Or5.9±1.4 (Ab81.8-91.1, N = 4).

Classification: Data are most consistent with an L6 chondrite.

Specimens: Cascadia holds 40.4 g, a polished thin section, and potted butt. John Shea holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:
Date:P April 2013
Mass (g):136.8
Pieces:1
Class:L6
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):25.8±0.4
Ferrosilite (mol%):21.6±0.4
Wollastonite (mol%):1.8±0.3
Classifier:M. Ream and A. Ruzicka, Cascadia
Type spec mass (g):42
Type spec location:Cascadia
Main mass:John A. Shea, 201 East Valley Rd, Wallingford, PA, 19086
Comments:Lab number CML0746; submitted by A. Ruzicka
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
John A. Shea   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7579 approved meteorites from (Northwest Africa) (plus 1969 unapproved names)

Direct link to this page