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Fedorov, P I; Kovalenko, D V; Ageeva, O A (2011): Rocks of the Western Kamchatka-Koryak continental margin volcanogenic belt: age, chemical and mineral compositions [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.788661, Supplement to: Fedorov, PI et al. (2011): Western Kamchatka-Koryak continental margin volcanogenic belt: Age, composition, and sources. Translated from Geokhimiya, 2011, 49(8), 813-838, Geochemistry International, 49(8), 768-792, https://doi.org/10.1134/S0016702911060036

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Published: 2011 (exact date unknown) • DOI registered: 2012-10-12

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Abstract:
An isotope-geochemical study of Eocene-Oligocene magmatic rocks from the Western Kamchatka-Koryak volcanogenic belt revealed lateral heterogeneity of mantle magma sources in its segments: Western Kamchatka, Central Koryak, and Northern Koryak ones. In the Western Kamchatka segment magmatic melts were generated from isotopically heterogeneous (depleted and/or insignificantly enriched) mantle sources significantly contaminated by quartz-feldspathic sialic sediments; higher 87Sr/86Sr (0.70429-0.70564) and lower 143Nd/144Nd [eNd(T) = 0.06-2.9] ratios in volcanic rocks from the Central Koryak segment presumably reflect contribution of an enriched mantle source; high positive eNd(T) and low 87Sr/86Sr ratios in magmatic rocks from the Northern Koryak segment area indicate their derivation from an isotopically depleted mantle source without significant contamination by sialic or mantle material enriched in radiogenic Sr and Nd. Significantly different contamination histories of Eocene-Oligocene mantle magmas in Kamchatka and Koryakia are related to their different thermal regimes: higher heat flow beneath Kamchatka led to crustal melting and contamination of mantle suprasubduction magmas by crustal melts. Cessation of suprasubduction volcanism in the Western Kamchatka segment of the continental margin belt was possibly related to accretion of the Achaivayam-Valagin terrane 40 Ma ago, whereas suprasubduction activity in the Koryak segment stopped due to closure of the Ukelayat basin in Oligocene.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 59.818747 * Median Longitude: 164.057467 * South-bound Latitude: 51.470000 * West-bound Longitude: 155.850000 * North-bound Latitude: 64.900000 * East-bound Longitude: 172.040000
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Fedorov, PI; Kovalenko, DV; Ageeva, OA (2011): (Table 1) K-Ar age determinations for volcanic rocks of the Western Kamchatka-Koryak volcanogenic belt. https://doi.org/10.1594/PANGAEA.788614
  2. Fedorov, PI; Kovalenko, DV; Ageeva, OA (2011): (Table 2) Chemical composition of magmatic rocks from the Western Kamchatka segment of the Western Kamchatka-Koryak volcanogenic belt. https://doi.org/10.1594/PANGAEA.788615
  3. Fedorov, PI; Kovalenko, DV; Ageeva, OA (2011): (Table 3) Sm/Nd and Rb/Sr isotopic ratios in magmatic rocks from the Western Kamchatka-Koryak volcanogenic belt and host terrigenous quartz-feldspathic rocks. https://doi.org/10.1594/PANGAEA.788616
  4. Fedorov, PI; Kovalenko, DV; Ageeva, OA (2011): (Table 4) Chemical composition of magmatic rocks from the Central Koryak segment of the Western Kamchatka-Koryak volcanic belt. https://doi.org/10.1594/PANGAEA.788659
  5. Fedorov, PI; Kovalenko, DV; Ageeva, OA (2011): (Table 5) Chemical composition of magmatic rocks from the Northern Koryak segment of the Western Kamchatka-Koryak volcanogenic belt. https://doi.org/10.1594/PANGAEA.788660