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Reckling Peak A79008
Basic information Name: Reckling Peak A79008
     This is an OFFICIAL meteorite name.
Abbreviation: RKPA79008
This meteorite may also be called Reckling Peak 79008 (RKP 79008) in publications.

Observed fall: No
Year found: 1979 or 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 73 g
Antarctic Meteorite Newsletter:  AMN 4(1)  (1981)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.5/3.8
NHM Catalogue:  5th Edition  (2000)  L3.5/3.8
MetBase:  v. 7.1  (2006)  L3.5-3.8
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  L3.5-3.8
Recommended:  L3.5-3.8    [explanation]

This is the only approved meteorite classified as L3.5-3.8.
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeup from AMN 4(1):

Sample No.: RKPA79008

Location: Reckling Peak

Field No.: 1183

Weight (gms): 73.0

Meteorite Type: L3 Chondrite


Physical Description: Roberta Score

Black fusion crust covers 50% of this stone. Areas devoid of fusion crust are greenish-black in color and extremely clastic. Numerous clasts (rounded and irregular in shape) exist in the 1 mm to 2 mm size fraction. These range in color from cream to black. Two larger clasts (0.7 cm and 1.5 cm in longest dimension) are visible and are cream colored. The interior matrix is medium to dark gray in color. Dimensions: 5 x 3.5 x 3.5 cm.


Petrographic Description: Brian Mason

Chondrules are abundant, ranging from 0.3-1.8 mm in diameter; a wide variety of types is present, the commonest being granular olivine and olivine-pyroxene, barred olivine, and fine-grained pyroxene. The granular chondrules have intergranular glass, sometimes pale brown and transparent, but commonly turbid and partly devitrified. Irregular clasts, probably chondrule fragments, are also present. Some of the pyroxene in the chondrules is polysynthetically twinned clinoenstatite or clinobronzite. The matrix is fine-grained olivine and pyroxene, with minor subequal amounts of nickel-iron and troilite. Remnants of fusion crust, up to 0.3 mm thick, are present along one edge. Minor weathering is indicated by brown limonitic staining in association with the fusion crust and the nickel-iron grains. Microprobe analyses show that most of the olivine has composition Fa23, but a range of composition Fa1-29 is present; pyroxene composition is variable, Fs2-29, average Fs16. The meteorite is classified as an L3 chondrite.

Data from:
  Table 2
  Line 5383:
Mass (g):73
Weathering grade:B
Fayalite (mol%):1-29
Ferrosilite (mol%):2-28
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References: Published in Antarctic Meteorite Newsletter 4(1) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 16'S, 159° 15'E)
     Recommended::   (76° 12' 58"S, 158° 32' 42"E)
Note: the NHM and MetBase coordinates are 19.6 km apart

     This is 1 of 40756 approved meteorites from Antarctica (plus 4494 unapproved names)
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