Sushchevskaya, Nadezhda M; Korago, E A; Belyatsky, Boris V; Sirotkin, A N (2009): Geochemistry and isotopic ratios of Neogene basalts from Spitzbergen Island, Svalbard archipelago [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.792717, Supplement to: Sushchevskaya, NM et al. (2009): Geochemistry of Neogene magmatism at Spitsbergen Island. Geochemistry International, 47(10), 966-978, https://doi.org/10.1134/S0016702909100024
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Abstract:
Petrological and geochemical data obtained on Neogene magmatism restricted to a deep fault in Andree Land at Spitsbergen Island, which was related to the overall restyling of the Arctic territory at 25-20 Ma, indicate that the derivation of the Neogene magmas was significantly affected by the continental pyroxenite mantle. The Neogene basalts are noted for a radiogenic isotopic composition of Pb (207Pb/204Pb= 15.5-15.55, 206Pb/204Pb = 18.4-18.6, 208Pb/204Pb = 38.4-38.6) and Sr (87Sr/86Sr = 0.7038-0.7048) at low 143Nd/144Nd = 0.5129. Melts of this type are the extremely enriched end member of the isotopic mixing of a depleted and enriched sources and determine a geochemical trend that passes through the compositions of alkaline magmas from Quaternary volcanoes at Spitsbergen and weakly enriched tholeiites of the Knipovich Ridge, which started to develop simultaneously with the onset of Neogene magmatism in the western part of Spitsbergen. The composition of the liquidus olivine (which is rich in NiO) indicates that melting occurred in the olivine-free mantle. Our data thus testify that a significant role in the genesis of the Neogene magmas was played by continental pyroxenite mantle.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 79.293027 * Median Longitude: 14.140817 * South-bound Latitude: 79.198000 * West-bound Longitude: 13.524500 * North-bound Latitude: 79.364100 * East-bound Longitude: 14.707300
Date/Time Start: 2003-01-01T00:00:00 * Date/Time End: 2003-01-01T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
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3 datasets
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Datasets listed in this publication series
- Sushchevskaya, NM; Korago, EA; Belyatsky, BV et al. (2009): (Table 2) Element composition of Neogene basalts from Spitsbergen. https://doi.org/10.1594/PANGAEA.792715
- Sushchevskaya, NM; Korago, EA; Belyatsky, BV et al. (2009): (Table 3) Sr, Nd and Pb isotopic ratios in Neogene basalts from Spitsbergen. https://doi.org/10.1594/PANGAEA.792716
- Sushchevskaya, NM; Korago, EA; Belyatsky, BV et al. (2009): (Table 1) Major element oxides of Neogene basalts from Spitsbergen. https://doi.org/10.1594/PANGAEA.792714