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Sulfur isotope signatures of sulfides from the Khibina and Lovozero massifs (Kola Alkaline Province, Fennoscandian Shield)
DOI: 10.21443/1560-9278-2021-24-1-80-87
- The Molecular Weight Distribution of Occluded Hydrocarbon Gases in the Khibiny Nepheline–Syenite Massif (Kola Peninsula, NW Russia) in Relation to the Problem of Their Origin
Valentin A. Nivin, Vyacheslav V. Pukha, Olga D. Mokrushina, Julia A. Mikhailova
Geosciences, 2022; 12(11): 416 - Sulfur Isotopic Composition of Sulfides and Sulfates from Rocks of Carbonatite Complexes of the Devonian Kola Alkaline Province
E. N. Kozlov, E. N. Fomina, V. N. Reutsky, M. Yu. Sidorov
Geochemistry International, 2024; 62(6): 561 - Sulfur isotopic composition of sulfides and sulphates from rocks of carbonatite complexes of the devonian Kola alkaline province
E. N. Kozlov, E. N. Fomina, V. N. Reutsky, M. Yu. Sidorov
Abstract. The sulfur isotope geochemistry of the Khibina and Lovozero agpaitic massifs provides an opportunity to understand the role of plume-lithosphere interaction processes responsible for the Paleozoic alkaline igneous activity in the north-eastern part of the Fennoscandian Shield. The stable sulfur isotope δ 34S analysis using triple collector isotope ratio mass spectrometer (IRMS) has been carried out on the pentlandite, chalcopyrite and pyrite from nepheline syenites. The δ 34S values for pentlandite from Khibina rocks range from +0.69 to +2.06 ‰ relative to the Vienna Canyon Diablo Troillite standard (VCDT), and the pyrite has significantly higher δ 34S values up to +4.92 ‰ VCDT. The pentlandite from the Lovozero samples has value +1.48 ‰ VCDT, δ 34S values of chalcopyrite is +2.85 ‰ VCDT. The maximum positive δ 34S values are obtained for Lovozero pyrite, which vary from +5.41 to +6.30 ‰ VCDT. Comparison of sulfur-geochemical features of Khibina and Lovozero nepheline syenite with δ 34S data for the carbonatites from the Khibina, Sallanlatvi, Seblyavr, Vuoriyarvi, Salmagora and Kovdor massifs show later carbonatite formation relatively to associated alkaline rocks. Geochemical sulfur isotope δ 34S investigations emphasizes that parental magmas of the Khibina and Lovozero alkaline massifs were derived from a metasomatized subcontinental lithospheric mantle (SCLM). We suggest that high-?34S signature on the SCLM (δ 34S of +1 to +6 ‰ VCDT) can be explained by subduction of the high-δ 34S Archaean crust.
Printed reference: Huber M., Mokrushin A. V. Sulfur isotope signatures of sulfides from the Khibina and Lovozero massifs (Kola Alkaline Province, Fennoscandian Shield) // Vestnik of MSTU. 2021. V. 24, No 1. P. 80-87.
Electronic reference: Huber M., Mokrushin A. V. Sulfur isotope signatures of sulfides from the Khibina and Lovozero massifs (Kola Alkaline Province, Fennoscandian Shield) // Vestnik of MSTU. 2021. V. 24, No 1. P. 80-87. URL: http://vestnik.mstu.edu.ru/v24_1_n86/07_Huber_80-87.pdf.
