Results 171 to 180 of about 27,288 (232)

HOLOCENE EXPLOSIVE ERUPTION ON THE VETROVOY ISTHMUS (ITURUP ISLAND) AS A SOURCE OF THE 2000 cal BP MARKER TEPHRA LAYER IN THE CENTRAL KURIL ISLAND ARC

Доклады РОССИЙСКОЙ АКАДЕМИИ НАУК. Науки о Земле, 2023
Geochemical study of volcaniclastic material and radiocarbon dating of charred plant debris from Holcene deposits of the Guram site, which is located in vicinity of Vetrovoy Isthmus at Iturup Island, demonstrate that explosive eruption (VEI 4-5) occurred
O. Bergal-Kuvikas, S. Z. Smirnov, A. Agatova, A. Degterev, N. G. Razjigaeva, T. Pinegina, M. Portnyagin, N. Karmanov, T. Timina   +8 more
semanticscholar   +1 more source

Ore Elements and Minerals in the Sublimates of Alaid Volcano, Kuril Island Arc

Journal of Volcanology and Seismology
V. V. Petrova, V. A. Rashidov, A. B. Perepelov, V. I. Silaev, L. P. Anikin, N. V. Gorkova, V. V. Mikheev   +6 more
openaire   +2 more sources

Kurile island-arc volcanism: structural and petrological aspects

Tectonophysics, 1991
Abstract This study discusses the structural and spatial characteristics of all known Kurile island-arc Quaternary volcanoes, which include 105 that are subaerial and 96 submarine. Volcanic activity in the island arc is distributed in two zones parallel to the Kurile-Kamchatka deep-sea trench. The depth to the seismo-focal zone in the frontal zone is
G.P. Avdeiko, O.N. Volynets, A.Yu. Antonov, A.A. Tsvetkov   +3 more
openaire   +1 more source

Mineralogy, geochemistry and petrogenesis of Kurile island-arc basalts

Contributions to Mineralogy and Petrology, 1989
Whole-rock (major- and trace-element) and mineral chemical data are presented for basaltic rocks from the main evolutionary stages of the Kurile island arc, NW Pacific. An outer, inactive arc contains a Cretaceous-Lower Tertiary sequence of tholeiitic, calcalkaline and shoshonitic basalts.
Bailey, J. C., Frolova, T. l., Burikova, I. A.   +2 more
openaire   +1 more source

Geochemistry of late Cenozoic lavas on Kunashir Island, Kurile Arc

Island Arc, 2010
AbstractMiddle Miocene to Quaternary lavas on Kunashir Island in the southern zone of the Kurile Arc were examined for major, trace, and Sr–Nd–Pb isotope compositions. The lavas range from basalt through to rhyolite and the mafic lavas show typical oceanic island arc signatures without significant crustal or sub‐continental lithosphere contamination ...
Alexey Y. Martynov, Jun‐Ichi Kimura, Yuri A. Martynov, Alexsander V. Rybin   +3 more
openaire   +1 more source

Petrochemical variations of island arc andesites (Kurile Island Arc)

Journal of Geophysical Research: Solid Earth, 1988
The problem of comparison of island arc andesites in terms of petrochemical data is examined. It has been proved that in the case of the Kurile Arc, two main factors exist governing the petrochemical variety of andesites. We have made use of original multivariate statistical techniques and computer software to extract these factors.
openaire   +1 more source

Granitoids in the basement of the Kurile island arc system

Doklady Earth Sciences, 2014
The Kurile island arc system consists of three large structural elements: the frontal zone, the Greater Kurile Ridge, and the backrc zone adjacent to the latter on the side of the Sea of Okhotsk in the form of submarine volcanic ridges. The frontal zone includes the Pacific slope of the Kurile arc consisting of the underwater Vityaz Ridge and islands ...
E. P. Lelikov, T. A. Emel’yanova
openaire   +1 more source

Magmatism of Kunashir island (Kuril island arc) from aerogeophysical evidence

Russian Journal of Pacific Geology, 2007
The existence of a lateral volcanic zoning in the Kuril island arc (KIA) was confirmed by the analysis of the 1: 50 000 scale maps of the abundances of natural radioactive elements (NRE). Trends of the NRE ratios were calculated for the magmatic complexes of the KIA, and their relation to fluidization processes was proved. Based on aerogeophysical data
openaire   +1 more source

MINERAL ZONING OF THE QUATERNARY LAVAS OF THE KURILE ISLAND ARC

International Geology Review, 1990
(1990). MINERAL ZONING OF THE QUATERNARY LAVAS OF THE KURILE ISLAND ARC. International Geology Review: Vol. 32, No. 2, pp. 128-142.
O. N. Volynets, G. P. Avdeyko, A. A. Tsvetkov, A. Yu. Antonov, I. A. Markov, T. M. Filosofova   +5 more
openaire   +1 more source

Revealing of surface deformations induced by geodynamic processes in the Kuril island arc from GNSS data

, 2020
Kuril subduction zone is one of the most active continental margins due to the high plate convergence rate. Latest oceanographical, seismological and geological studies show a block structure of the Kuril island arc. In 2006-2008 Kuril GNSS network was
Y. Gabsatarov, I. Vladimirova, G. Steblov, L. Lobkovsky, Ksenia Muravieva   +4 more
semanticscholar   +1 more source