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| Basic information | Name: Hart This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2010 Country: United States Mass:  966 g | ||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 79 approved meteorites classified as CK3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||||
| Comments: |
Approved 12 Dec 2012 Revised 28 Sep 2020: Corrected weathering grade | ||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 101:
Hart 34.377182°N, 102.116719°W Castro County, Texas, USA Found: 2010 March Classification: Carbonaceous chondrite (CK3) History: In March 2010, a field worker found a dense stone beside a road located 0.25 mile from the town of Hart. The specimen was purchased by Jason Phillips in July 2012. Physical characteristics: A single, large brownish stone weighing 966 g. Petrography: (A. Irving and S. Kuehner, UWS) Separated, medium-sized chondrules and rare, small CAIs occur within a fairly altered, deep reddish-brown matrix. Discrete grains of Cr-magnetite are present in PO chondrules. One CAI (diameter 150 μm) is composed of gehlenite + spinel + perovskite with a rim containing andradite garnet; a separate large grain of gehlenite was found. The matrix contains Cr-magnetite and minor Ni-poor kamacite (some grains rimmed by magnetite), as well as secondary iron hydoxides. Most olivine and pyroxene are very magnesian, but more ferroan grains are present in the matrix. Geochemistry: Olivine (Fa0.9-50.2; Cr2O3 = 0.19-0.21 wt.%), orthopyroxene (Fs0.8-16.2Wo0.8-1.2), magnesian pigeonite (Fs0.9Wo20.7), subcalcic diopside (Fs2.1Wo34.8), diopside (Fs0.6Wo44.9), Al-Ti-rich diopside (Fs0.4Wo55.1; TiO2 = 1.2 wt.%, Al2O3 = 9.6 wt.%). Classification: Carbonaceous chondrite (CK3, S2, W2/3). Specimens: A total of 20.96 g of sample and one polished thin section are on deposit at UWB. The main mass is held by Mr. J. Phillips. Writeup from MB 109: Hart: weathering grade clarification
MetBull 101 contained an error in the table of data. The weathering grade of Hart is actually W2/3. | ||||||||||||||||||||||||||||||||||
| Data from: MB101 Table 0 Line 0: |
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| Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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| References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015 Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 313 approved meteorites from Texas, United States (plus 2 unapproved names) (plus 3 impact craters) This is 1 of 1893 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||||||||
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