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Dominion Range 85505
Basic information Name: Dominion Range 85505
     This is an OFFICIAL meteorite name.
Abbreviation: DOM 85505
Observed fall: No
Year found: 1985 or 1986
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 31.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  LL5
Meteoritical Bulletin:  MB 76  (1994)  LL5
NHM Catalogue:  5th Edition  (2000)  LL5
MetBase:  v. 7.1  (2006)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3132 approved meteorites classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 10(2):

Sample No.: DOM85505; DOM85506

Location: Dominion Range

Weight (g): 31.4; 58.8

Field No.: 2093; 2016

Dimensions (cm): 3 x 2 x 2; 4.5 x 2.5 x 2.5

Meteorite Type: LL5 Chondrite with Enclave

 

Macroscopic Description: Roberta Score

Both specimens are angular and are nearly complete stones. Cleaving DOM85505 revealed an interior which is medium gray in color that contains enclaves of whitish-gray material. Gray and white clasts are abundant. The interior of DOM85506 is less weathered than DOM85505 and has irregularly shaped white and gray clasts. The white clasts are as large as 1 cm in largest dimension.

 

Thin Section (DOM85505.3) Description: Brian Mason

The section shows sparse chondrules in a matrix of fine-grained olivine and pyroxene, with a little nickel-iron and sulfide. On one edge is a clast, 6 mm across, of large pyroxene grains poikilitically enclosing numerous small olivine grains. Minor weathering is indicated by brown limonitic staining around metal grains. Microprobe analyses show the following compositions: chondritic olivine Fa26, pyroxene Fs22; clast olivine Fa26, pyroxene Fs23. The meteorite is classified as an LL5 chondrite, but the large clast is an unusual feature. DOM85506 is so similar that it can certainly be paired with DOM85505.

Data from:
  MB76
  Table 2
  Line 1423:
Mass (g):31.4
Class:LL5
Weathering grade:B
Fayalite (mol%):26
Ferrosilite (mol%):22
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (85° 20'S, 166° 30'E)
     Recommended::   (85° 20'S, 166° 30'E)

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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