KFU. Card publication. X-Ray Computed Microtomography of Sulfide Minerals: Studies of Microinclusions and Implications for the Sm

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X-RAY COMPUTED MICROTOMOGRAPHY OF SULFIDE MINERALS: STUDIES OF MICROINCLUSIONS AND IMPLICATIONS FOR THE SM&NDASH;ND DATING OF ORE GENESIS

Form of presentation

Articles in Russian journals and collections

Year of publication

2022

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Authors, employees of KFU

Kadyrov Rail Ilgizarovich, author

Bibliographic description in the original language

Serov P.A. et al. X-Ray Computed Microtomography of Sulfide Minerals: Studies of Microinclusions and Implications for the Sm–Nd Dating of Ore Genesis / Serov, P. A., Kadyrov, R. I., Kalashnikov, A. O. // Doklady Earth Sciences. -. 2022. -. Vol. 507, No. S3. P. S400–S405

Annotation

Abstract: A microtomographic study of the internal structure of sulfide minerals from the ore-bearing rock varieties of two economically significant deposits in the Arctic zone of the Russian Federation, disseminated ore of the Pilgujarvi Cu–Ni deposit (Pechenga) and metalliferous gabbronorites of the platinum-bearing Fedorovo–Pansky complex (Kola Peninsula), was carried out. It was shown that all sulfide samples studied had a homogeneous structure without obvious defects or silicate inclusions larger than 1 ?m. The absence of silicate microinclusions larger than one micron in sulfides testifies to the isomorphism of rare earth element (REE) occurrence in sulfides and eliminates, to a certain extent, the debatable problem of the influence of microinclusions on the results of Sm–Nd isotope-geochronological studies of sulfides. The presence of smaller (10–500 nm) silicate microinclusions is, with a high degree of probability, unable to control the total REE budget in a sulfide mineral. The conclusion of the absence of a significant effect of microinclusions on the obtained ages is confirmed by the results of Sm–Nd dating using sulfides from the same mineral aliquots: the Sm–Nd ages of the ores of the Pilgujarvi Cu–Ni deposit were estimated at 1965 ? 87 Ma; and the ore-bearing gabbronorites of the Fedorovo-Pansky complex, at 2482 ? 61 Ma. This agrees well with the datings obtained earlier using other isotopic systems (U–Pb, Re–Os).

Keywords

REE; Sm?Nd age; X-ray computed microtomography; geochronology; mineral inclusions; ore genesis; sulfides

The name of the journal

Doklady Earth Sciences

URL

https://link.springer.com/article/10.1134/s1028334x2260164x

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=297864&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Kadyrov Rail Ilgizarovich	ru_RU
dc.date.accessioned	2022-01-01T00:00:00Z	ru_RU
dc.date.available	2022-01-01T00:00:00Z	ru_RU
dc.date.issued	2022	ru_RU
dc.identifier.citation	Serov P.A. et al. X-Ray Computed Microtomography of Sulfide Minerals: Studies of Microinclusions and Implications for the Sm–Nd Dating of Ore Genesis / Serov, P. A., Kadyrov, R. I., Kalashnikov, A. O. // Doklady Earth Sciences. -. 2022. -. Vol. 507, No. S3. P. S400–S405	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=297864&p_lang=2	ru_RU
dc.description.abstract	Doklady Earth Sciences	ru_RU
dc.description.abstract	Abstract: A microtomographic study of the internal structure of sulfide minerals from the ore-bearing rock varieties of two economically significant deposits in the Arctic zone of the Russian Federation, disseminated ore of the Pilgujarvi Cu–Ni deposit (Pechenga) and metalliferous gabbronorites of the platinum-bearing Fedorovo–Pansky complex (Kola Peninsula), was carried out. It was shown that all sulfide samples studied had a homogeneous structure without obvious defects or silicate inclusions larger than 1 ?m. The absence of silicate microinclusions larger than one micron in sulfides testifies to the isomorphism of rare earth element (REE) occurrence in sulfides and eliminates, to a certain extent, the debatable problem of the influence of microinclusions on the results of Sm–Nd isotope-geochronological studies of sulfides. The presence of smaller (10–500 nm) silicate microinclusions is, with a high degree of probability, unable to control the total REE budget in a sulfide mineral. The conclusion of the absence of a significant effect of microinclusions on the obtained ages is confirmed by the results of Sm–Nd dating using sulfides from the same mineral aliquots: the Sm–Nd ages of the ores of the Pilgujarvi Cu–Ni deposit were estimated at 1965 ? 87 Ma; and the ore-bearing gabbronorites of the Fedorovo-Pansky complex, at 2482 ? 61 Ma. This agrees well with the datings obtained earlier using other isotopic systems (U–Pb, Re–Os).	ru_RU
dc.language.iso	ru	ru_RU
dc.subject		ru_RU
dc.title	X-Ray Computed Microtomography of Sulfide Minerals: Studies of Microinclusions and Implications for the Sm–Nd Dating of Ore Genesis	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU