Tenham (meteorite)
In tenham is an observed meteorite fall in 1879, near the tenham station in the region Charters Towers , Queensland , Australia .
The Tenham meteorite is a stone meteorite . The coordinates of the case today with 25 ° 44 '0 " S , 142 ° 57' 0" O indicated.
Tenham has not yet been published in the Meteoritical Society's Meteoritical Bulletin , but is officially recognized by the Meteoritical Society as an observed meteorite fall.
Fragments of the Tenham meteorite are kept in the Smithsonian Institution's National Museum of Natural History (Catalog No. USNM 7703).
Tenham as a type locality
The discovery of a natural sample of the mineral bridgmanite in a fragment of the meteorite led to the official recognition of this mineral by the Commission on new Minerals, Nomenclature and Classification (CNMNC) of the International Mineralogical Association (IMA), which until then was only hypothetical as part of a group of Silicate perovskites in the rocks of the earth's mantle was known.
In addition to bridgmanite , akimotoite and ringwoodite were first discovered in the Tenham meteorite . The meteorite is therefore considered the type locality for these minerals.
Furthermore were in the meteorite the minerals chromite , diopside , solid iron and its varieties Kamacite and martensite , enstatite and Hypersthene as a mixed crystal of enstatite and ferrosilite, ilmenite , Isocubanit , clino-enstatite , solid copper , Ling Unit , magnetite , majorite , taenite and Plessit as Mixtures of taenite and kamacite, tetrataenite , troilite , tuit , wadsleyite and wüstite found. The samples also contained olivine and silicate glasses such as maskelynite .
Web links
Individual evidence
- ^ Meteoritical Bulletin: Entry for Tenham. The Meteoritical Society, accessed January 12, 2015 .
- ↑ Oliver Tschauner, Chi Ma, John R. Beckett, Clemens Prescher, Vitali B. Prakapenka, George R. Rossman: Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite. In: Science : Volume 346, No. 6213, November 28, 2014, pp. 1100–1102 doi : 10.1126 / science.1259369
- ^ IMA Commission on New Minerals, Nomenclature and Classification (CNMNC). Newsletter 21 In: Mineralogical Magazine. August 2014 Volume 78 (4), pp. 797–804 ( PDF 96.1 kB ; IMA No. 2014-017 Bridgmanite p. 1)
- ^ A b Tenham meteorite, Tenham Station, South Gregory, Charters Towers Region, Queensland, Australia. In: Mindat.org. Hudson Institute of Mineralogy, accessed January 12, 2015 .