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Carlton meteorite, Carlton, Hamilton Co., Texas, USA

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Latitude & Longitude (WGS84): 31° 55' 0'' North , 98° 1' 59'' West
Latitude & Longitude (decimal): 31.91667,-98.03333
Non-native locality type:Meteorite
Meteorite Class:IAB-sLM iron meteorite
Meteoritical Society Class: Iron, IAB-sLM
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Cfa : Humid subtropical climate

Iron, fine octahedrite (IAB-sLM; Of)
Found 1887, 81.2 kg

An Fe-Ni rich mass (~13% Ni) was plowed up about 8 miles (13 km) south of Carlton, passed through several hands, and — eventually —distributed via the Ward & Howell collection with several moderately large pieces going to several museums. The meteorite is texturally and mineralogically dominated by its octahedral framework, but plessite, martensite, traces of Neumann bands, and small rhabdite needles give abundant evidence that the meteorite has experienced significant pre-terrestrial shock. While schreibersite is quite prominent, other minor minerals such as troilite, graphite, and haxonite are quite unevenly distributed. Carlton also has received some special attention as a new mineral, Chladniite (a Na-Ca-Mg phosphate) was discovered in a chlorapatite-rich inclusion. Chladniite is one of several phosphates discovered in iron meteorites during the past few decades.

Carlton is currently classified as a member of the low Au, medium-rich Ni subgroup within the IAB group. The IAB group has only recently been consolidated and now includes a number of meteorites such as Carlton, previously classified as a IIICD iron. As of late 2014, the IAB Group or Complex represented approximately one quarter of all recovered iron meteorites. As of 2000, Carlton masses of greater than 5 kg were in the possession of the Field Museum in Chicago and the Naturhistorisches Museum in Wiens (Vienna) while several smaller, medium-sized masses are distributed elsewhere as well.

Mineral List

8 valid minerals. 1 (TL) - type locality of valid minerals.

Meteorite/Rock Types Recorded

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Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press, 1418 pp.
McCoy, T. J., Steele I. M., Keil K., Leonard, B. F. & Endreß, M. (1994) Chladniite, Na2CaMg7(PO4)6: A new mineral from the Carlton (IIICD) iron meteorite. American Mineralogist 79 (3/4): 375-380. (March/April 1994)
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

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