Fukang
Part of Fukang meteorite, Natural History Museum, Vienna.
TypeStony–iron
ClassPallasite
GroupMain Group Pallasite (MGP)
CompositionFe 89.9 wt%, Ni 9.0 wt%, P 0.62 wt%, Co 0.51 wt%; Ge 41 µg/g, As 26 µg/g, Ga 19.1 µg/g, Pd 5.1 µg/g, Au 2.6 µg/g; Ir 43 ng/g.
CountryChina
RegionFukang, Xinjiang Province
Coordinates44°26′N 87°38′E / 44.433°N 87.633°E / 44.433; 87.633
Observed fallNo
Found date2000
TKW1003 kg
Related media on Wikimedia Commons

The Fukang meteorite is a meteorite that was found in the mountains near Fukang, China in 2000. It is a pallasite—a type of stony–iron meteorite with olivine crystals. It is estimated to be 4.5 billion years old.

History

In 2000, near Fukang, China, a Chinese dealer obtained a mass from Xinjiang Province, China, with a weight of 1,003 kilograms (2,211 lb). He removed about 20 kilograms (44 lb) from the main mass, and in February 2005, the meteorite was taken to the Tucson Gem and Mineral Show, where it was seen by Dr. Dante Lauretta, a professor of Planetary Science and Cosmochemistry at the University of Arizona.

Subsequently, the mass was investigated at the Southwest Meteorite Center, Lunar and Planetary Laboratory, University of Arizona in Tucson, Arizona by Dr. Lauretta and a team of research scientists including Dolores Hill, Marvin Killgore, Daniella DellaGiustina, and Dr. Yulia Goreva, and joined by Dr. Ian Franchi of Open University.[1]

Classification and composition

The Fukang pallasite contains large, gem quality olivine, or peridot, in a nickel-iron matrix. The olivines vary in shape from rounded to angular, many are fractured and they range in size from less than five millimetres to several centimetres. The main mass contains several regions of massive olivine clusters up to eleven centimetres (4.3 inches) in diameter with thin metal veins. Fo86.4 with molar Fe/Mg = 0.1367, Fe/Mn = 40.37, and Ni = 0.03 wt%. The metal matrix is mostly kamacite with an average nickel content of 6.98 wt%. Vermicular sulfide (troilite) is present in some olivine.
Oxygen isotopes: δ18O 2.569 ‰, δ17O 1.179 ‰, ∆1 7O = −0.157 ‰.[2]

Specimens

A section weighing 31 kilograms (68 lb; 4.9 st) of type specimen is on deposit at the University of Arizona. Marvin Killgore holds an additional section weighing the same amount, as well as the balance of the main mass.[1]

In April 2008, Bonhams offered the main mass for auction at their Manhattan auction. Bonhams expected to fetch US$2,000,000, but the lot remained unsold. A "window" area of 19 by 36 inches (480 mm × 910 mm) was cut and polished to provide a view into the gem areas of the meteorite.[3]

The main mass, viewed from the polished side.

See also

References

  1. 1 2 Meteoritical Bulletin Database: Fukang
  2. ↑ Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
  3. ↑ Farlang Team (2008-12-07). Fukang Meteorite, Gemstone Meteorites: a Peridot from Outer Space. Farlang, 7 December 2008. Retrieved from http://www.farlang.com/art/gemstone-meteorites.
  • Lauretta, D. S; Hill, D. H.; Della-Giustina, D. N.; Killgore, M. (March 2006). "The Fukang Pallasite: Evidence for Non-Equilibrium Shock Processing" (PDF). 37th Annual Lunar and Planetary Science Conference. OCLC 21999338. Retrieved 2012-10-21.
  • Southwest Meteorite Laboratory - Fukang Pallasite
Wikimedia Commons has media related to Fukang (meteorite).
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.