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Ooldea 015
Basic information Name: Ooldea 015
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2013
Country: Australia
Mass:help 58.2 g
Classification
  history:
Recommended:  Howardite    [explanation]

This is 1 of 372 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 27 Mar 2019
Writeuphelp
Writeup from MB 108:

Ooldea 015        30°31’53.5"S, 131°50’15.7"E

South Australia, Australia

Find: 23 Apr 2013

Classification: HED achondrite (Howardite)

History: Single non-magnetic stone found by A. Tomkins

Physical characteristics: A brown flatish stone with sparse patches (5%) of black fusion crust.

Petrography: (S. Alkemade) This meteorite is an achondrite polymict breccia, containing clasts of eucrite and diogenite with sizes ranging from 0.2-5 mm in a clastic matrix. Mineralogy consists of orthopyroxene (>10%), clinopyroxene, plagioclase and minor olivine. A few dark angular clasts (0.5-2 mm) are fragments of carbonaceous chondrite material with mineralogy including amphibole, mg-spinel, and clinopyroxene. Accessory minerals are troilite, FeNi metal, chromite, ilmenite and olivine. The sample is highly shocked with most clasts exhibiting mosaic extinction and planar deformation features. Oxidation of metal and troilite is slight.

Geochemistry: (S. Alkemade) Orthopyroxene (Fs42.1±11.9, n=10), pigeonite (Fs22.1Wo11.0), augite (Fs25.8Wo47.1), plagioclase (An87, n=4), and rare olivine (Fa6.65, n=1). Oxygen isotope analysis completed at UNM by Karen Ziegler, samples acid treated. δ17O’=1.586 (per mil, ±0.190) , δ18O’=3.644 (per mil, ±0.387), Δ17O’=-0.338 (per mil, ±0.043).

Classification: Howardite. Oxygen isotopes plot slightly below the eucrite/diogenite fractionation line, suggesting material from the carbonaceous chondrite clasts was included in the analyses.

Data from:
  MB108
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:23 Apr 2013
Latitude:30°31'53.5"S
Longitude:131°50'15.7"E
Mass (g):58.2
Pieces:1
Class:Howardite
Shock stage:high
Weathering grade:moderate
Classifier:S. Alkemade, Monash
Type spec mass (g):54
Type spec location:Monash
Main mass:Monash
Finder:A. Tomkins
Comments:Submitted by A. Tomkins
Plots: O isotopes:  
Institutions
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
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. 108, in preparation (2019)
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Geography:

Australia
Coordinates:
     Recommended::   (30° 31' 54"S, 131° 50' 16"E)

Statistics:
     This is 1 of 232 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters)
     This is 1 of 702 approved meteorites from Australia (plus 46 unapproved names) (plus 27 impact craters)
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