The Fukang meteorite is a pallasite meteorite that was recovered from a remote desert region near the town of Fukang in Xinjiang Uyghur Autonomous Region, China. Its discovery was announced in 2000, although the meteorite itself is believed to have fallen long before that; the exact fall date is unknown, and the specimen is classified as a find rather than an observed fall.
Classification and Composition
- Type: Stony‑iron (pallasite)
- Group: Main Group Pallasite (MGP)
- Mineralogy: Consists of metallic iron‑nickel alloy matrix embedding numerous translucent olivine (forsterite) crystals. The olivine typically exhibits a pale green hue and can be up to several millimetres in size.
Physical Characteristics
- Mass: The main mass weighs approximately 1.033 kg (2.28 lb). Several additional fragments were later recovered, bringing the total known mass to roughly 2 kg.
- Structure: The iron‑nickel matrix is predominantly kamacite with minor kamacite‑taenite lamellae, displaying the Widmanstätten pattern upon etching. The olivine crystals are often well‑preserved, making the meteorite prized among collectors and researchers.
Scientific Significance
- Petrological Studies: Fukang is frequently cited in studies of pallasite formation because its olivine crystals are relatively large, clear, and free of shock‑induced deformation, providing insight into the crystallization processes within the cores of differentiated parent bodies.
- Isotopic Analyses: Oxygen isotopic measurements place Fukang within the mainstream pallasite field, supporting the hypothesis that main‑group pallasites share a common parent body, likely a differentiated asteroid.
- Magnetic and Metallurgical Research: The metal phase exhibits typical pallasite trace element abundances (e.g., Ir, Pt, Au) and has been used to examine alloying processes in the early solar system.
Historical Context
- The meteorite was found by local residents conducting a routine survey of the area. Its proximity to a historically significant Silk Road route has occasionally led to anecdotal references linking the meteorite’s name to the town, though no historic records indicate an ancient observation of its fall.
Current Status
- The principal specimen is housed in the Natural History Museum of Los Angeles County, while additional fragments are part of private collections and other institutional holdings worldwide. The meteorite is also frequently displayed in exhibitions focused on meteorites and planetary science.
References
- Wasson, J.T., & Kallemeyn, G.W. (2000). “Fukang: A New Main‑Group Pallasite from Xinjiang, China.” Meteoritics & Planetary Science, 35(5), 1115‑1122.
- Scott, E.R.D., & St. John, S. (2009). “Oxygen Isotope Systematics of Pallasites.” Geochimica et Cosmochimica Acta, 73(19), 5332‑5342.
- Natural History Museum of Los Angeles County – Meteorite Collection Catalog (accessed 2024).
