doi:

DOI: 10.3724/SP.J.1084.2013.00386

Chinese Journal of Polar Research (极地研究) 2013/25:4 PP.386-393

CHEMICAL AND PETROLOGIC STUDY OF THE HEYETANG METEORITE


Abstract:
The Heyetang meteorite is an ordinary chondrite that fell in October 1998. The petrologic subtype of the Heyetang meteorite was determined on the basis of detailed petrologic and mineralogical characteristics. The mean value of Fa in the olivine is 23.2, with a range from 0.6 to 48.8 (percent mean deviation (PMD)=60.1%). The mean value of Fs in low-Ca pyroxene is 9.1 with a range from 0.6 to 49.0(PMD=97.5%). Thus, it is an unequilibrated type 3 ordinary chondrite. The chemical group was indicated by Fa value, the total Fe-Ni metal and troilite contents, the Co and Ni contents in kamacite and it actually has L group features. According to the PMD of Fa content in olivine, the Cr2O3 content in olivine and Ni-rich metals in chondrules, the petrologic subtype of the Heyetang meteorite belongs to L3.3. Therefore, Heyetang meteorite is one of the most primitive ordinary chondrites in all of the non-Antarctic meteorites in China.

Key words:Heyetang, ordinary meteorite, unequilibrated meteorite, L3.3

ReleaseDate:2014-07-21 16:59:40



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