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Reckling Peak A78002
Basic information Name: Reckling Peak A78002
     This is an OFFICIAL meteorite name.
Abbreviation: RKPA78002
This meteorite may also be called Reckling Peak 78002 (RKP 78002) in publications.

Observed fall: No
Year found: 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 8.48 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 3(2)  (1980)  H4
Meteoritical Bulletin:  MB 76  (1994)  H4
NHM Catalogue:  5th Edition  (2000)  H4
NIPR Catalogue:  2000 Edition  (2000)  H4
MetBase:  v. 7.1  (2006)  H4
Recommended:  H4    [explanation]

This is 1 of 5990 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)
Writeuphelp
Writeup from AMN 3(2):
This text was reprinted from AMN 3(2) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: RKPA78002

Location: Reckling Peak

Field No.: Reckling Peak #2

Weight (gms): 8433.0

Meteorite Type: H4 Chondrite

 

Physical Description:

This tabular shaped meteorite has 4 flat and 2 semi-rounded surfaces with sharp ridges. 0.5 mm thick black, polygonally fractured fusion crust covers the entire specimen except for areas along the ridges where it has been broken off. The areas void of fusion crust are greenish-brown in color and contain numerous inclusions. One fracture penetrates the interior of the meteorite. After drying for several days in the nitrogen cabinet, minute amounts of white deposit appeared along the polygonal fractures. The cut face reveals a weathering rind ~1-4 mm thick. Abundant metal blebs are obvious with most of the metal having oxidation halos around them. Several chondrules (~2 mm diameter) are present. Dimensions: 17 x 13.5 x 17 cm.

 

Petrographic Description: Arch Reid

Chondrules, ranging from 0.2 to 1.5 mm but mostly sub mm., are abundant and many are well-defined. Porphyritic chondrules, with equant euhedral olivines and with elongate skeletal olivines in turbid devitrified glass, are common. Fine-grained pyroxene-rich chondrules, including excentroradial pyroxene aggregates, are also common. Spherical chondrules have well-defined borders whereas irregular chondrules and chondrule fragments tend to merge with the matrix. The matrix contains abundant metallic iron, troilite, olivine and pyroxene with some isolated large olivine and pyroxene crystals. Olivine and pyroxene are unzoned and some of the pyroxene grains are polysynthetically twinned clinobronzite. Microprobe analyses show uniform olivine (Fa18.5) and pyroxene (Wo1.5En83Fs15.5). Limonite staining is present in minor amounts. The meteorite is classified as an H4 chondrite.

Data from:
  MB76
  Table 2
  Line 5375:
Mass (g):8483
Class:H4
Weathering grade:Be
Fayalite (mol%):18
Ferrosilite (mol%):15
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 3(2) (1980), 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° 16'S, 159° 15'E)

Statistics:
     This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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