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Ledneva, G V; Nosova, A A; Soloviev, A V (2006): Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.744377, Supplement to: Ledneva, GV et al. (2006): Calc-alkaline magmatism of the Omgon Range: Evidence for Early Paleogene extension in the Western Kamchatka segment of the Eurasian continental margin. Petrology, 14(2), 154-186, https://doi.org/10.1134/S0869591106020020

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Abstract:
Hypabyssal rocks of the Omgon Range, Western Kamchatka that intrude Upper Albian-Lower Campanian deposits of the Eurasian continental margin belong to three coeval (62.5-63.0 Ma) associations: (1) ilmenite gabbro-dolerites, (2) titanomagnetite gabbro-dolerites and quartz microdiorites, and (3) porphyritic biotite granites and granite-aplites. Early Paleocene age of ilmenite gabbro-dolerites and biotite granites was confirmed by zircon and apatite fission-track dating. Ilmenite and titanomagnetite gabbro-dolerites were produced by multilevel fractional crystallization of basaltic melts with, respectively, moderate and high Fe-Ti contents and contamination of these melts with rhyolitic melts of different compositions. Moderate- and high-Fe-Ti basaltic melts were derived from mantle spinel peridotite variably depleted and metasomatized by slab-derived fluid prior to melting. The melts were generated at variable depths and different degrees of melting. Biotite granites and granite aplites were produced by combined fractional crystallization of a crustal rhyolitic melt and its contamination with terrigenous rocks of the Omgon Group. The rhyolitic melts were likely derived from metabasaltic rocks of suprasubduction nature. Early Paleocene hypabyssal rocks of the Omgon Range were demonstrated to have been formed in an extensional environment, which dominated in the margin of the Eurasian continent from Late Cretaceous throughout Early Paleocene. Extension in the Western Kamchatka segment preceded the origin of the Western Koryakian-Kamchatka (Kinkil') continental-margin volcanic belt in Eocene time. This research was conducted based on original geological, mineralogical, geochemical, and isotopic (Rb-Sr) data obtained by the authors.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 58.007530 * Median Longitude: 157.742058 * South-bound Latitude: 57.999600 * West-bound Longitude: 157.677400 * North-bound Latitude: 58.016300 * East-bound Longitude: 157.759200
Event(s):
O-27 * Latitude: 57.999600 * Longitude: 157.758100 * Location: Kamchatka Peninsula
O-28(4) * Latitude: 58.005300 * Longitude: 157.756000 * Location: Kamchatka Peninsula
O-28(6) * Latitude: 58.006700 * Longitude: 157.755000 * Location: Kamchatka Peninsula
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
9 datasets

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Datasets listed in this publication series

  1. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 1) Fission age of zircon and apatite from sills of the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744365
  2. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 2) Representative analyses of pyroxenes in hypabyssal rocks from the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744366
  3. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 3) Representative analyses of plagioclase in hypabyssal rocks from the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744367
  4. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 4) Composition of ilmenite and titanomagnetite in hypabyssal rocks from the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744370
  5. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 5) Composition of biotite from a granite porphyry sill in the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744371
  6. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 6) Integral composition of granophyre patches in hypabyssal rocks of the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744372
  7. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 7) Concentrations of major and trace elements in hypabyssal rocks of the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744374
  8. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 8) Concentrations of trace elements in terrigenous rocks hosting sills in the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744375
  9. Ledneva, GV; Nosova, AA; Soloviev, AV (2006): (Table 9) Whole-rock Rb-Sr isotopic data on hypabyssal magmatic and terrigenous rocks hosting them in the Omgon Range, Western Kamchatka coastal area. https://doi.org/10.1594/PANGAEA.744376