Esquel (meteorite)

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Esquel
Esquel.jpg
The slice shows the crystals transparency
Type Stony–iron
Class Pallasite
Group Main Group Pallasite (MGP)
Composition 8.5% Ni, 21.5 ppm Ga, 55.5 ppm Ge, 0.023 ppm Ir
Country Argentina
Region Esquel, Chubut
Coordinates 42°54′S 71°20′W / 42.900°S 71.333°W / -42.900; -71.333Coordinates: 42°54′S 71°20′W / 42.900°S 71.333°W / -42.900; -71.333
Observed fall No
Found date between 1927 and 1934[1]
TKW 1500 kg?[1][2]

Esquel is a pallasite meteorite found near Esquel, a patagonian town in the northwest part of the province of Chubut (Argentina). Pallasites are a type of stony–iron meteorite that when cut and polished show beautiful yellowish olivine (peridot) crystals.

History[edit]

In 1951 a farmer uncovered a meteorite in an unknown location near Esquel while digging a hole for a water tank. The meteorite was purchased from the finders and taken to the United States in 1992 by meteorite expert Robert Haag. The Esquel meteorite is known world-wide among collectors and the meteoritical scientific community.

Classification and composition[edit]

Esquel is a main group pallasite (MGP).

Specimens[edit]

The Meteoritical Bulletin no. 29 (1964) reports a main mass of "about 1500 kg".[1] However O. A. Turone claimed a main mass weight of 755 kilograms (1,664 lb).[2] Robert Haag, the buyer of the main mass, reported a weight of 680 kilograms (1,500 lb).[3] Almost all of the Esquel ever found on the market is cut from his piece.

It is one of the most beautiful meteorites ever found so it is also one of the most desirable pallasites among meteorite collectors.

Esquel slice at the American Museum of Natural History

Notes and references[edit]

  1. ^ a b c Meteoritical Bulletin, no. 29, Moscow (1964)
  2. ^ a b "The weight of the main mass is 755kg and not 1500kg as indicated", O.A.Turone, Buenos Aires, priv. comm. to J.Koblitz, 1994. MetBase 7.0 for Windows. Author: Joern Koblitz, The MetBase Library of Meteoritics and Planetary Sciences, Benquestrasse 27, D-28209 Bremen, Germany
  3. ^ http://adsabs.harvard.edu/full/1998M&PS...33..221U

See also[edit]

External links[edit]