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Knardna 001
Basic information Name: Knardna 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: Australia
Mass:help 43.3 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  H4
Recommended:  H4    [explanation]

This is 1 of 5778 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Jul 2015
Writeuphelp
Writeup from MB 104:

Knardna 001        31° 0’18.70"S, 130°54’18.60"E

South Australia, Australia

Purchased: 2012 May 16

Classification: Ordinary chondrite (H4)

History: Fragment found by J. Kuyken on claypan.

Physical characteristics: Broken desert-red fragment with 15% fusion crust.

Petrography: (L. Bowlt, Monash) This sample contains chondrules that are highly fragmented and poorly defined, as well as chondrules that make sharp contact with the surrounding matrix. The chondrules range in size up to 2 mm (average 0.2-1 mm). There are distinct light/dark areas at the sub-centimeter scale corresponding to two differing types of matrix; the majority of the sample contains recrystallised matrix and there are two areas that have an optically opaque matrix associated with shock blackening. Minerals include olivine, pyroxene, plagioclase (1-2 microns), Fe-Ni metal and troilite. Chondrules are relatively abundant (20-25%) and chondrule types include RP, BO, PO, PP and POP. Olivine grains show undulose extinction and shock lamellae. 60-70% of metal and troilite have been oxidised with the remaining 30-40% divided up between 30-35% sulphides and 5-10% metal grains.

Geochemistry: (L. Bowlt, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa16.9-17.7, mean= 17.3 mol%, std= 0.38, n=4; Low-Ca pyroxene Fs 14.8-15.9, mean= 15.48 mol%, std= 0.45, n=4.

Classification: Ordinary Chondrite (H4 , S3, W3)

Specimens: Specimen and one thin-section held by A. Tomkins.

Data from:
  MB104
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:P 2012 May 16
Latitude:31° 0'18.70"S
Longitude:130°54'18.60"E
Mass (g):43.3
Pieces:1
Class:H4
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):17.3
Ferrosilite (mol%):15.5
Wollastonite (mol%):1.37
Classifier:L. J. Bowlt, Monash
Type spec mass (g):16.5
Type spec location:Monash
Main mass:Monash
Finder:J. Kuyken
Comments:Submitted by (A. Tait, A. Tomkins, A. Bowlt, S. Nutku, J. Savage)
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

Australia
Coordinates:
     Recommended::   (31° 0' 19"S, 130° 54' 19"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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