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Reckling Peak A80224
Basic information Name: Reckling Peak A80224
     This is an OFFICIAL meteorite name.
Abbreviation: RKPA80224
This meteorite may also be called Reckling Peak 80224 (RKP 80224) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(2)  (1981)  Eucrite-unbr
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-unbr
NHM Catalogue:  5th Edition  (2000)  Eucrite-unbr
MetBase:  v. 7.1  (2006)  Eucrite-mmict
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 92 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 4(2):

Sample No.: RKPA80224

Location: Reckling Peak

Field No.: 1291

Weight (gms): 8.0

Meteorite Type: Unbrecciated Eucrite

 

Physical Description: Roberta Score

Thin, shiny black fusion crust covers five surfaces. One surface is a fracture surface. Areas devoid of fusion crust contain white crystals with dark inclusions. When this achondrite was chipped, fine-grain material was apparent between the white crystals. Some oxidation is present. Dimensions: ~3.5 x 1.5 x 1.0 cm.

 

Petrographic Description: Brian Mason

The section shows an ophitic intergrowth of pigeonite and plagioclase, with accessory amounts of tridymite and opaque minerals; the average grain size of pyroxene and plagioclase is about 1 mm. Fusion crust is present on one edge of the section. The pyroxene and plagioclase crystals are somewhat granulated and show undulose extinction. A little limonitic staining is present in one area of the section. Microprobe analyses show pigeonite with an average composition of Wo10Fs54En36; some grains show exsolution lamellae of augite with composition Wo44Fs26En30. Plagioclase ranges in composition from An85 to An91, with a mean of An89. The opaque minerals are troilite and titanian chromite (TiO2 13-15%). The meteorite is an unbrecciated eucrite (pyroxene-plagioclase achondrite).

Data from:
  MB76
  Table 2
  Line 5411:
Mass (g):8
Class:Eu "ub"
Weathering grade:A/B
Ferrosilite (mol%):54
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 4(2) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 16'S, 159° 15'E)
     Recommended::   (76° 12' 22"S, 158° 30' 25"E)
Note: the NHM and MetBase coordinates are 20.9 km apart

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