| Reference Type | Journal (article/letter/editorial) |
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| Title | Clinopyroxenite-Wehrlite Porya Guba Complex with Fe-Ti-V and PGE-Cu-Ni Mineralization in the Northeastern Part of the Fennoscandian Shield: Evidence of Post-Orogenic Formation from Sm-Nd Isotope System |
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| Journal | Minerals |
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| Authors | Serov, Pavel A. | Author |
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| Groshev, Nikolay Yu. | Author |
| Year | 2024 | Volume | < 14 > |
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| Issue | < 11 > |
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| URL | |
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| DOI | doi:10.3390/min14111099Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 17668271 | Long-form Identifier | mindat:1:5:17668271:4 |
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| GUID | 0 |
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| Full Reference | Serov, Pavel A., Groshev, Nikolay Yu. (2024) Clinopyroxenite-Wehrlite Porya Guba Complex with Fe-Ti-V and PGE-Cu-Ni Mineralization in the Northeastern Part of the Fennoscandian Shield: Evidence of Post-Orogenic Formation from Sm-Nd Isotope System. Minerals, 14 (11). doi:10.3390/min14111099 |
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| Plain Text | Serov, Pavel A., Groshev, Nikolay Yu. (2024) Clinopyroxenite-Wehrlite Porya Guba Complex with Fe-Ti-V and PGE-Cu-Ni Mineralization in the Northeastern Part of the Fennoscandian Shield: Evidence of Post-Orogenic Formation from Sm-Nd Isotope System. Minerals, 14 (11). doi:10.3390/min14111099 |
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| In | Link this record to the correct parent record (if possible) |
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| Abstract/Notes | The Porya Guba clinopyroxeniteâwehrlite complex is located in the core of the LaplandâKola collisional orogen ( 2.0â1.9 billion years old) in the northeastern part of the Fennoscandian Shield and contains ironâtitaniumâvanadium and nickelâcopper mineralization with platinum group elements (PGEs). The controversial geological position of the complex within the mafic granulites of the Kolvitsa mĂ©lange (pre-, syn- or post-orogenic) is clarified by Sm-Nd isotopic dating of the rocks and mineralization. The Sm-Nd age of the barren clinopyroxenites that dominate the complex is 1858 ± 34 Ma (ΔNd(T) = â1.5) and is interpreted as the time of its emplacement as evidenced by a sample from the largest intrusion, named Zhelezny. This age is younger than that of the peak of granulite metamorphism in the host rocks (1925â1915 Ma) and coincides within error with the age of rutile from granulites (1880â1870 Ma), indicating the time at which cooling to 450 °C occurs. Emplacement in the cooled rocks is confirmed by the detection of quenching zones in clinopyroxenites around granulite xenoliths. Magnetite ores, as well as mineralized pyroxenites with sulfide disseminations, are formed during a late stage of the complex development, as suggested by active assimilation of granulite xenoliths by these rocks. The isotopic age of mineralized pyroxenites enriched in PGEs is 1832 ± 35 Ma (ΔNd(T) = â2.0), while the age of magnetite ores is 1823 ± 19 Ma (ΔNd(T) = â2.5). Thus, the obtained isotopic data indicate that the emplacement of the Porya Guba complex and probably other small maficâultramafic intrusions in the Kolvitsa mĂ©lange granulites took place after the end of the LaplandâKola collision. |
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