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Reckling Peak A80258
Basic information Name: Reckling Peak A80258
     This is an OFFICIAL meteorite name.
Abbreviation: RKPA80258
This meteorite may also be called Reckling Peak 80258 (RKP 80258) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 5(1)  (1982)  Mesosiderite
Meteoritical Bulletin:  MB 76  (1994)  Mesosiderite
NHM Catalogue:  5th Edition  (2000)  Mesosiderite
MetBase:  v. 7.1  (2006)  Mesosiderite-AN
Recommended:  Mesosiderite-an    [explanation]

This is 1 of 7 approved meteorites classified as Mesosiderite-an.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Writeuphelp
Writeup from AMN 5(1):

Sample No.: RKPA80258

Location: Reckling Peak

Field No.: 1071

Weight (gms): 4.3

Meteorite Type: Mesosiderite

 

Physical Description: Roberta Score

Fusion crust covers one surface of this meteorite. Visible on it are two large clasts, probably pyroxene, measuring 1.0 x 0.5 cm and 0.5 x 0.4 cm in dimension. both show cleavage faces. The specimen is highly weathered, although metal was detected in chipping. Sample is paired with RKPA80229, RKPA80246, and RKPA80263. Dimensions: 1.5 x 1.5 x 1 cm

 

Petrographic Description: Brian Mason

The section shows angular clasts of orthopyroxene up to 2 mm across in a nickel-iron matrix, closely resembling RKPA79015, RKPA80229, and RKPA80246. A thick rind of red-brown limonite rims part of the section. Microprobe analyses show some variability in pyroxene composition: Wo2.3-2.9, En77-80, Fs17-21, in contrast to RKPA79015, RKPA80229, and RKPA80246, in which the pyroxene has essentially uniform composition of Wo2En74Fs24. Rare grains of calcium-rich plagioclase of somewhat variable composition (An86-An94) were noted. The unique nature of these specimens and their otherwise close similarity indicates that they are probably pieces of a single meteorite, a metal-rich mesosiderite.

Data from:
  MB76
  Table 2
  Line 5445:
Mass (g):4.3
Class:Meso
Weathering grade:B/C
Ferrosilite (mol%):17-21
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 5(1) (1982), 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' 48"S, 158° 26' 25"E)
Note: the NHM and MetBase coordinates are 22.3 km apart

Statistics:
     This is 1 of 38937 approved meteorites from Antarctica (plus 5051 unapproved names)
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