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| Purgatory Peak A77006 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Purgatory Peak A77006 This is an OFFICIAL meteorite name. Abbreviation: PGPA77006 This meteorite may also be called Purgatory Peak 77006 (PGP 77006) in publications. Observed fall: No Year found: 1977 or 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  19.07 kg | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 120 approved meteorites classified as Iron, IAB-MG. [show all] Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 57:
Warning: the following text was scanned and may contain character recognition errors. Refer to the original to be sure of accuracy. DISCOVERY
OF THE PURGATORY PEAK A77006, ANTARCTICA, Name: PURGATORY PEAK A77006 Place of find: Victoria Valley, Antarctica 77°20'S., 162°25'E. Date of find: January 23, 1978. Class and type: Iron. Number of individual specimens: 1 Total weight: 19.068 kg. Circumstances of find: Found by Mr. Steven Kite of the University of Maine in modern morainal deposits about 600 m from the terminal face of Victoria glacier. Source: Dr. W.A. Cassidy, University of Pittsburg, Pittsburg, Pennsylvania 15260, USA. [From Antarctic Meteorite Newsletter 4(1):] Sample No.: PGPA77006 Location: Victoria Valley Field No.: 78012301 Weight (gms): 19068.0 Meteorite Type: Iron - Group I or Og w Physical Description: This sample is an iron meteorite with an ablation pitted surface. Approximately one-half the specimen (north, east, and, bottom hemisphere) is brownish-black with a metallic luster. This area appears to have been polished by physical processes (wind ablation). The opposite hemisphere (south, west, and top portion) is chemically weathered. The color of this surface ranges from rust through gray to greenish. This surface is flaking. Approximate dimension of specimen: 20 cms diameter. The specimen appears to have been partially buried at sometime. Several inclusions and voids where former inclusions existed are present on the surface.
Tentative Classification: Roy S. Clarke, Jr. An area of approximately 80 cm2 of macroetched surface was examined. Kamacite band widths are in the 1.5 to 2 mm range, with length to width ratios ranging from 4 to 10. Neumann bands are abundant, and the kamacite along about half of the rim of the slice has been converted to α2 by atmospheric ablation. Taenite and taenite-plessite areas occupy at least half of the kamacite grain boundaries, and a number of areas of comb plessite are present. Schreibersite is present in grain boundaries, and one area of lamellar schreibersite surrounded by cohenite is present. Cohenite and schreibersite are present at the edge of the slice in an area that may have bordered a troilite inclusion. No large inclusions were observed. External weathering of the specimen ranges from light to severe. The specimen is a coarse octahedrite, a typical Group I or Og meteorite. | ||||||||||||||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 5284: |
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| References: | Published in Antarctic Meteorite Newsletter 3(2) (1980), JSC, Houston Published in Meteoritical Bulletin, no. 57, Meteoritics 15, 93-104 (1980) Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:
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Statistics: This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||||||||||||||
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