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Biduna Blowhole 002
Basic information Name: Biduna Blowhole 002
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2011
Country: Australia
Mass:help 13 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  L4
Recommended:  L4    [explanation]

This is 1 of 1617 approved meteorites (plus 4 unapproved names) classified as L4.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 23 Feb 2012
Writeuphelp
Writeup from MB 100:

Biduna Blowhole 002        31°01’58.7"S, 131°17’07.7"E

South Australia, Australia

Found: 06 Apr 2011

Classification: Ordinary chondrite (L4)

History: Single piece found by A. Tomkins on the Nullarbor Plain.

Physical characteristics: A well-rounded, dark-brown stone with ~60% remnant fusion crust and a single broken face.

Petrography: (E. Mare, Monash) Sample shows well-defined chondrules (0.5 to 2mm in diameter) and recrystallized matrix. Chondrule types include RP, POP, PP, BO and PO. Fe-Ni metal grains (5%) are 100 μm on average and unevenly distributed. Troilite grains (4%) to 200 μm. Metal and troilite have been partly replaced by oxides, however only to a limited extent, with ~3% oxides in this meteorite. Olivine grains show weak undulose extinction

Geochemistry: (E. Mare, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa25.0-25.4, mean=25.22 mol%, std=0.21, n=4; Low-Ca pyroxene Fs21.5-21.9, mean=21.67 mol%, std=0.19, n=4.

Classification: Ordinary chondrite (L4, S2, W2)

Data from:
  MB100
  Table 1
  Line 32:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:6 Apr 2011
Latitude:31°01'58.7"S
Longitude:131°17'07.7"E
Mass (g):13
Pieces:1
Class:L4
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):25.22
Ferrosilite (mol%):21.67
Wollastonite (mol%):1.32
Classifier:E. R. Mare
Type spec mass (g):8.7
Type spec location:Monash
Main mass:Monash
Finder:A.Tomkins
Comments:Submitted by A. Tomkins, E. Mare, A. Tait, A. Langendam
Institutions
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:

Australia
Coordinates:
     Recommended::   (31° 1' 59"S, 131° 17' 8"E)

Statistics:
     This is 1 of 233 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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