| Reference Type | Journal (article/letter/editorial) |
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| Title | Mineralogy of a unique graphite-containing fragment in the Krymka chondrite (LL3) |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Semenenko, V. P. | Author |
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| Girich, A. L. | Author |
| Year | 1995 (September) | Volume | 59 |
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| Issue | 396 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_59/59-396-443.pdf+ |
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| DOI | doi:10.1180/minmag.1995.059.396.06Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 2664 | Long-form Identifier | mindat:1:5:2664:6 |
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| GUID | 0 |
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| Full Reference | Semenenko, V. P., Girich, A. L. (1995) Mineralogy of a unique graphite-containing fragment in the Krymka chondrite (LL3) Mineralogical Magazine, 59 (396) 443-454 doi:10.1180/minmag.1995.059.396.06 |
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| Plain Text | Semenenko, V. P., Girich, A. L. (1995) Mineralogy of a unique graphite-containing fragment in the Krymka chondrite (LL3) Mineralogical Magazine, 59 (396) 443-454 doi:10.1180/minmag.1995.059.396.06 |
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| In | (1995, September) Mineralogical Magazine Vol. 59 (396) Mineralogical Society |
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| Abstract/Notes | AbstractThe Krymka chondrite contains an exotic graphite-bearing fragment that appears to be of a new type of material added to unequilibrated LL-chondrite during agglomeration on the surface of the parent body. The fine-granular texture without chondrules, two morphological groups of graphite crystals which differ in size and occurence, high content of troilite (11.3 vol.%), the high Ni (55.5–66.6 wt.%) and Co (1.59–2.87 wt.%) contents of the taenite and absence of kamacite, the presence of F-apatite, which is rare for meteorites but common for lunar and terrestrial igneous rocks, are the main features of the fragment.The mineralogy and texture indicate: (1) the fragment probably formed by crystallization from a highly reduced silicate melt, which had been enriched in carbon; 2) the subsequent metal sulphidization lowered its abundance and resulted in the formation of troilite and the compositional features of the residual metal; (3) terrestrial weathering of an exotic fragment and the host part of the chondrite produced iron hydroxides, pentlandite and quite possibly magnetite. |
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