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Biduna Blowhole 004
Basic information Name: Biduna Blowhole 004
     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 114.5 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  H5
Recommended:  H5    [explanation]

This is 1 of 9649 approved meteorites (plus 16 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 9 Jan 2013
Writeuphelp
Writeup from MB 102:

Biduna Blowhole 004        31°1’58.0"S, 131°17’7.9"E

South Australia, Australia

Found: 6 Apr 2011

Classification: Ordinary chondrite (H5)

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

Physical characteristics: Unusually shaped 8 × 2.5 × 2 cm stone, dense, rounded edges, lacking fusion crust.

Petrography: (E. Mare, Monash) Sample contains few well-defined chondrules (largest is 2 mm) and recrystallized and rusted matrix. Chondrule types include CC, RP, POP, PP, BO. Fe-Ni metal grains (5%) are 250 μm on average. Troilite grains (3%) are 50-100 μm on average. Both metal and troilite have been partly replaced by oxides, however only to a limited extent, with ~5% oxides in this meteorite. Olivine grains show slightly undulose extinction and occasionally planar fractures. There is evidence of melt pockets where troilite and metal have flowed around silicate grains.

Geochemistry: (E. Mare, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa19.4-20.0, mean=Fa19.6, std=0.3, n=4; Low-Ca pyroxene Fs17.4-18.0, mean=Fs17.5, std=0.3, n=4.

Classification: Ordinary chondrite (H5, S3, W2)

Data from:
  MB102
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:6 Apr 2011
Latitude:31°1'58.0"S
Longitude:131°17'7.9"E
Mass (g):114.5
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):19.6±0.3
Ferrosilite (mol%):17.5
Wollastonite (mol%):1.4
Classifier:E. R. Mare, Monash
Type spec mass (g):109.5
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. 102, MAPS 50, 1662, September 2015
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Geography:

Australia
Coordinates:
     Recommended::   (31° 1' 58"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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