Kyushu meteorite, Kagoshima Prefecture, Kyushu Region, Japan
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Latitude & Longitude (WGS84): | 32° 1' 59'' North , 130° 37' 59'' East |
---|---|
Latitude & Longitude (decimal): | 32.0333333333, 130.633333333 |
Erratic type: | Meteorite |
Ordinary chondrite, veined (L6; S5)
Fell, 26 October 1886; 45 kg, shower
During the afternoon a shower of meteoritic stones fell in the Satsuma and Osumi provinces on Japan's Kyushu Island. The mass of the largest stone was 29 kg with several smaller and even tiny stones recovered at the same time. Some stones were covered with a dark fusion crust and the interiors are greyish in color. Olivine and pyroxene are dominant both as olivine and pyroxene-rich chondrules (0.5-1 mm diameter) and within the silicate-rich matrix. Fe-Ni metal (predominantly kamacite), troilite, and maskelynite are the primary minor phases. Plagioclase is present in minor amounts both as pre-shock relics and as devitrified glass. Within the metal, plessite and martensite provide additional evidence of severe preterrestrial shock(s). Very minor amounts of chromite and diopside are also reported. Total iron (~22 wt%) and the compositions of olivine (Fo74) and orthopyroxene (En 78) are characteristic of the L (low in iron) ordinary chondrite group.
A rather low K-Ar age (0.73 Ga) provides additional evidence of possible impact events affecting this highly shocked meteorite. Indeed, the ~40 Ma cosmic ray exposure age of Kyushu and several other L6 chondrites may indicate a shared collisional history for these meteorites.
The largest stone was obtained by the Natural History Museum in London. A 3.6 kg mass retained by the Science Museum in Tokyo (as of 2000) is the largest of several additional masses held elsewhere. The meteorite has been listed under a much larger number of synonyms than is usually the case.
Mineral List
5 valid minerals.
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References
Mason, B.& Wiik, H.B. (1961) The Kyushu, Japan, chondrite. Geochim. Cosmochim. Acta. 21 (3-4): 272-275. (Jan 1961).
Mason, B. (1962) Classification of Chondritic Meteorites: American Museum Novitates, #2069. 20 pages. (May 1962).
Bunch, T.E., Keil, K. & Snetsinger, KG. (1967) Chromite composition in relation to chemistry and texture of ordinary chondrites: Geochimica et Cosmochimica Acta 31:1569-1582.
Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32 (12): 1327-1342. (Dec. 1968.)
Bennett, M.E. & McSween Jr, H.Y. (1996) Shock feature in iron-nickel metal and troilite of L-group ordinary chondrites Meteoritics & Planetary Science 31(2): 255-26. (March 1996).
Alexeev, V.A. (1998) Parent bodies of H and L chondrites: Times of catastrophic events. Meteoritics & Planetary Science 33(1). (Jan 1998).
Grady, M.M (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Dunn, T.L. (2008) Determination of Mineral Abundances in Ordinary Chondrites Using Powder X-ray Diffraction: Applications to Parent Body Processes and Asteroid Spectroscopy. Doctoral Dissertation: Univ. Tenn., Knoxville. 161 pages.
Dunn, T.L., Cressy, G., McSween Jr, H.Y. & McCoy, T.J. (2010) Analysis of ordinary chondrites using powder X-ray diffraction: 1. Modal mineral abundances. Meteoritics & Planetary Science 45(1):123-134. (Jan 2010). (Jan 2010).
Mason, B. (1962) Classification of Chondritic Meteorites: American Museum Novitates, #2069. 20 pages. (May 1962).
Bunch, T.E., Keil, K. & Snetsinger, KG. (1967) Chromite composition in relation to chemistry and texture of ordinary chondrites: Geochimica et Cosmochimica Acta 31:1569-1582.
Van Schmus, W.R. & Ribbe, P.H. (1968) The composition and structural state of feldspar from chondritic meteorites: Geochimica et Cosmochimica Acta 32 (12): 1327-1342. (Dec. 1968.)
Bennett, M.E. & McSween Jr, H.Y. (1996) Shock feature in iron-nickel metal and troilite of L-group ordinary chondrites Meteoritics & Planetary Science 31(2): 255-26. (March 1996).
Alexeev, V.A. (1998) Parent bodies of H and L chondrites: Times of catastrophic events. Meteoritics & Planetary Science 33(1). (Jan 1998).
Grady, M.M (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Dunn, T.L. (2008) Determination of Mineral Abundances in Ordinary Chondrites Using Powder X-ray Diffraction: Applications to Parent Body Processes and Asteroid Spectroscopy. Doctoral Dissertation: Univ. Tenn., Knoxville. 161 pages.
Dunn, T.L., Cressy, G., McSween Jr, H.Y. & McCoy, T.J. (2010) Analysis of ordinary chondrites using powder X-ray diffraction: 1. Modal mineral abundances. Meteoritics & Planetary Science 45(1):123-134. (Jan 2010). (Jan 2010).
External Links
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=12390 -Kyushu@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5657563 - Tokyo specimen
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5630386 - Kyushu specimen
https://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5657074 -Kyushu@AMNH(NY)
http://www.lpi.usra.edu/meteor/metbull.php?code=12390 -Kyushu@MetBullDatabase
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5657563 - Tokyo specimen
http://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5630386 - Kyushu specimen
https://www.lpi.usra.edu/meteor/get_original_photo.php?recno=5657074 -Kyushu@AMNH(NY)