Viewing the tectonic evolution of the Kamchatka-Aleutian (KAT) connection with an Alaska crustal extrusion perspective

Scholl, David W.

doi:10.1029/172gm03

Cited by 39 publications

(58 citation statements)

References 123 publications

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“…In contrast to the main southern part of Kamchatka, where the Pacific Plate subducts below the Okhotsk Plate with a rate of *8 cm/a (Scholl 2007), the Bering part of the North American Plate (north of Shiveluch volcano) is likely to have been stable relative to Kamchatka since Miocene times (Trubitsin et al 1998;Baranov et al 1991;Park et al 2001;Baranov et al 1991;Avdejko et al 2002;Davaille and Lees, 2004). Therefore, there is no active subduction and we should not expect young volcanism in this back arc region.…”

Section: Geological Setting and Samplingmentioning

confidence: 99%

Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction

Volynets

Churikova

Wörner

et al. 2009

Contrib Mineral Petrol

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New 40 Ar/ 39 Ar and published 14 C ages constrain voluminous mafic volcanism of the Kamchatka backarc to Miocene (3-6 Ma) and Late Pleistocene to Holocene (\1 Ma) times. Trace elements and isotopic compositions show that older rocks derived from a depleted mantle through subduction fluid-flux melting ([20%). Younger rocks form in a back arc by lower melting degrees involving enriched mantle components. The arc front and Central Kamchatka Depression are also underlain by plateau lavas and shield volcanoes of Late Pleistocene age. The focus of these voluminous eruptions thus migrated in time and may be the result of a high fluid flux in a setting where the Emperor seamount subducts and the slab steepens during rollback during terrain accretions. The northern termination of Holocene volcanism locates the edge of the subducting Pacific plate below Kamchatka, a ''slab-edge-effect'' is not observed in the back arc region.

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Section: Geological Setting and Samplingmentioning

confidence: 99%

Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction

Volynets

Churikova

Wörner

et al. 2009

Contrib Mineral Petrol

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“…1a). The Pacific Plate is presently subducting at a rate of 8-9 cm/yr (DeMets et al, 1990;Geist and Scholl, 1994;Scholl, 2007). The slab below Kamchatka dips at 55°b ut shallows to 35°in the north where the Emperor Seamount chain, which formed on top of the Pacific Plate, is being subducted (Gorbatov et al, 1997).…”

Section: Geology and Tectonics Of The Central Kamchatka Depression Anmentioning

confidence: 99%

The Tolbachik volcanic massif: A review of the petrology, volcanology and eruption history prior to the 2012–2013 eruption

Churikova

Gordeychik

Edwards

et al. 2015

Journal of Volcanology and Geothermal Research

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“…1), although some alternatives have been suggested (e.g., Kozhurin, 2007; for review, see Scholl, 2007,). Recent global positioning system (GPS) measurements show the Komandorsky Island block is moving west-northwest at a rate roughly half the rate of Pacifi c plate movement relative to Kamchatka ( Fig.…”

Section: Geodynamic Settingmentioning

confidence: 99%

“…The general explanation for the topographic expression of the Kamchatsky Peninsula is collision of the extinct Eocene Kronotsky island arc or the Aleutian-Komandorsky chain (at its western extent identifi ed as the Komandorsky Island block) with the Kamchatka mainland (Geist and Scholl, 1994;McElfresh et al, 2002;Alexeiev et al, 2006;Lander and Shapiro, 2007;Scholl, 2007;Levin, 2009; Fig. 1), although some alternatives have been suggested (e.g., Kozhurin, 2007; for review, see Scholl, 2007,).…”

Section: Geodynamic Settingmentioning

confidence: 99%

A nexus of plate interaction: Vertical deformation of Holocene wave-built terraces on the Kamchatsky Peninsula (Kamchatka, Russia)

Pinegina¹,

Bourgeois²,

Kravchunovskaya³

et al. 2013

Geological Society of America Bulletin

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International audienceKamchatsky Peninsula lies within a complex meeting place of tectonic plates, in particular, the orthogonal interaction of the west-moving Komandorsky Island block with mainland Kamchatka. Examining the Holocene history of vertical deformation of marine wave-built terraces along the peninsular coast, we differentiated tectonic blocks undergoing uplift and tilting separated by zones of stable or subsided shorelines. We analyzed ∼200 excavations along >30 coastal profiles and quantified vertical deformation on single profiles as well as along the coast using paleoshorelines dated with marker tephras. For the past ∼2000 yr, the average rates of vertical deformation range from about -1 to +7 mm/yr. Uplift patterns are similar to those detected from historical leveling and from mapping of the stage 5e Quaternary marine terrace (ca. 120 ka). Average vertical deformation in the Holocene is highest for the shortest studied time period, from ca. A.D. 250 to 600, and it is several times faster than rates for marine oxygen isotope stage (MIS) 5e terraces. Vertical displacements observed along the coast are most likely coseismic and probably have included subsidence as well as uplift events. Because subsidence is generally associated with erosion, almost surely more prehistoric large earthquakes occurred than are recorded as topographic steps in these terraces. We suggest that the distribution of coastal uplift and subsidence observed along the Kamchatsky Peninsula coastline is qualitatively explained by the squeezing of the Kamchatsky Peninsula block between the Bering and Okhotsk plates, and the Komandorsky Island block

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Viewing the tectonic evolution of the Kamchatka-Aleutian (KAT) connection with an Alaska crustal extrusion perspective

Cited by 39 publications

References 123 publications

Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction

Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction

The Tolbachik volcanic massif: A review of the petrology, volcanology and eruption history prior to the 2012–2013 eruption

A nexus of plate interaction: Vertical deformation of Holocene wave-built terraces on the Kamchatsky Peninsula (Kamchatka, Russia)

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