Zaisho meteorite, Kami City, Kochi Prefecture, Shikoku Island, Japan
This page is currently not sponsored. Click here to sponsor this page.
| Latitude & Longitude (WGS84): | 33° 42' North , 133° 48' East |
| Latitude & Longitude (decimal): | 33.7, 133.8 |
Fall, 1 Feb 1898; 330 g
After the appearance of a fireball, a small mass was found. With its predominant components of Fe-Ni metal and olivine, Zaisho has been classified as a main group Pallasite and is one of only 4 witnessed falls as of late 2014. Zaisho is classified as an anomalous member of the Main Group of Pallasites. The nickel content of the Fe-Ni metal (Ni 10.75%) is unexceptional, but the olivine's rather high fayalite content (18 mol%) is closer to those of the Eagle Station Pallasite grouplet. Zaisho's unrounded Olivine also contains unusually high amounts of phosphorus and is sometimes 'kinked.' Minor amounts of troilite, schreibersite, chromite, stanfieldite, and farringtonite are also present. Zaisho also has small amounts of pyroxene. Pyroxene is usually absent in Pallasites, but in recent year has been detected in several Pallasites - usually in small quantities.
While oxygen isotopes, Ni-content of metal, olivine compositions, and other indicators all suggest that the Main Group Pallasites and the Eagle Station Pallasites are derived from a minimum of two separate original parent bodies (OPB). However, the implications of the oddballs and various main group outliers is not presently clear.
The main mass is in possession of S. Goto, Tokyo.
Mineral List
8 entries listed. 5 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
Shima, M., Okada, A. & Yabuki, H. (1980) Mineralogical and petrographical study of the Zaisho meteorite, a pallasite from Japan: Zeitschrift für Naturforschung, Teil a, vol. 35a: 64-68. (Jan. 1980)
Buseck, P. R. & Clark, J. (1982) The Zaisho Pallasite, à Bearer of Pyroxene and Phosphoran Olivine: Meteoritics 17 (4):189-190. (Dec 1982)
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
Buseck, P. R. & Clark, J. (1982) The Zaisho Pallasite, à Bearer of Pyroxene and Phosphoran Olivine: Meteoritics 17 (4):189-190. (Dec 1982)
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php = Meteoritical Bulletin Database
