MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 3 Jun 2023
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Yarle Lakes 004
Basic information Name: Yarle Lakes 004
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2009
Country: Australia
Mass:help 4.6 g
Meteoritical Bulletin:  MB 99  (2011)  CK4
Recommended:  CK4    [explanation]

This is 1 of 121 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 18 Jan 2011
Writeup from MB 99:

Yarle Lakes 004        30°30’S, 131°28’E

South Australia, Australia

Found: 11 May 2009

Classification: Carbonaceous chondrite (CK4)

History: D. Bradley found a single piece lying on the Nullarbor Plain.

Physical characteristics: The meteorite weighs 4.6 g and measures 2.2 cm x 1.6 cm x 0.7 cm. The surface is dark maroon to black and has no obvious fusion crust. The freshly cut surface reveals a dark rusted brown interior with several paler chondrules scattered throughout.

Petrography: (Kim Lai N. Bell, Monash) Large PO chondrules within a dark stained, fine-grained matrix and are difficult to discern due to the staining. Chondrules have a size range of 0.3-1 mm, with an average diameter of 0.6 mm. Mineralogy differs from an ordinary chondrite in that it contains no obvious metals or sulfides. Mineralogy dominated by olivine, plagioclase, pyroxenes and magnetite. Olivine and pyroxene grains have straight to undulose extinctions and occur within chondrules or as fragments in the matrix. Plagioclase tends to occur as small grains (≤50 μm) within both the matrix and chondrules. The silicates are stained a rusty brown, with up to 75% staining affecting them. Magnetite (4%) grains are irregular shaped, <0.1 mm in size and can be found rimming chondrules and within the matrix.

Geochemistry: EMPA (wt%) Olivine: SiO2 = 36.85, TiO2 = 0.02, Al2O3 = 0.02, FeO = 28.87, MnO = 0.26, MgO = 34.49, CaO = 0.02, Na2O = 0.01, K2O = 0.00, (Fa31.95±0.13, n = 6). Plagioclase: SiO2 = 55.73, TiO2 = 0.01, Al2O3 = 26.27, FeO = 0.52, MnO = 0.01, MgO = 0.22, CaO = 9.71, Na2O = 5.83, K2O = 0.65 (An47.26±18.59, n = 5). Pentlandite: Fe = 27.96, Ni = 30.66, Cr = 1.26, Mg = 0.71. Magnetite: Fe = 61.25, Cr = 3.27, Al = 1.33, Ti = 0.74, Mg = 0.34, Ni = 0.19.

Classification: Carbonaceous chondrite (CK4, S2, W1-4).

Specimens: Sample and one thin section held by A. Tomkins at Monash.

Data from:
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor
Date:11 May 2009
Mass (g):4.6
Shock stage:S2
Weathering grade:W4
Fayalite (mol%):32
Classifier:K.-L.N. Bell
Type spec mass (g):4.6
Type spec location:Monash
Main mass:Monash
Finder:D. Bradley
Comments:Submitted by K.-L.N. Bell, A. Tomkins
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
Find references in NASA ADS:
Find references in Google Scholar:

     Recommended::   (30° 30'S, 131° 28'E)

     This is 1 of 240 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters)
     This is 1 of 718 approved meteorites from Australia (plus 46 unapproved names) (plus 27 impact craters)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page