Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal

Пономарева, В. В.; Bubenshchikova, N.; Portnyagin, Maxim; Zelenin, Egor; Derkachev, A. N.; Gorbarenko, Sergey A; Garbe‐Schönberg, Dieter; Bindeman, Ilya N.

doi:10.1016/j.jvolgeores.2018.10.006

Cited by 16 publications

(23 citation statements)

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“…Marine sediments in the vicinity of North Pacific volcanic arcs are characterized by the continuous presence of volcanic glass of mixed compositions (e.g. Ponomareva et al ., ), which can contaminate primary tephra deposits. As the Kamchatkan erupted products exhibit a clear compositional change, e.g.…”

Section: Resultsmentioning

confidence: 61%

“…In addition, tephra layers are excellent stratigraphic markers and are widely used for correlating and dating disparate sedimentary successions (e.g. Shane, 2000;Lowe, 2011;Preece et al, 2011;Ponomareva et al, 2013aPonomareva et al, , 2018Blockley et al, 2014;Davies et al, 2016). Some of the most long, complete and detailed tephra sequences are preserved in non-erosive marine environments (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Middle to late Pleistocene record of explosive volcanic eruptions in marine sediments offshore Kamchatka (Meiji Rise, NW Pacific)

Derkachev

Gorbarenko

Пономарева

et al. 2019

J Quaternary Science

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This paper presents the first detailed study of a late Pleistocene marine tephra sequence from the NW Pacific, downwind from the Kamchatka volcanic arc. Sediment core SO201-2-40, located on the Meiji Rise~400 km offshore the peninsula, includes 25 tephras deposited within the last 215 ka. Volcanic glass from the tephras was characterized using single-shard electron microprobe analysis and laser ablation inductively coupled mass spectrometry. The age of tephras was derived from a new age model based on paleomagnetic and paleoclimate studies. Geochemical correlation of distal tephras to Kamchatkan pyroclastic deposits allowed the identification of tephras from the Karymsky, Gorely, Opala and Shiveluch eruptive centers. Three of these tephras were also correlated to other marine and terrestrial sites and hence are identified as the best markers for the north-west Pacific region. These are an early Holocene tephra from the Karymsky caldera (~8.7 ka) and two tephras falling into the Marine Isotope Stage (MIS) 6 glacial time: an MIS 6.4 tephra from Shiveluch (~141 ka) and the MIS 6.5 Rauchua tephra (~175 ka) from Karymsky. The data presented in this study can be used in paleovolcanological and paleoceanographic reconstructions. recovered from core SO201-2-40 on the Meiji Rise (NW Pacific) (Fig. 1). The record includes 25 tephra layers and lenses deposited during the last~215 ka. We present an age model for the core based on paleomagnetic and stratigraphic

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Section: Resultsmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Middle to late Pleistocene record of explosive volcanic eruptions in marine sediments offshore Kamchatka (Meiji Rise, NW Pacific)

Derkachev

Gorbarenko

Пономарева

et al. 2019

J Quaternary Science

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“…Holocene tephra layers mantle the topography and, being interlayered with paleosol or peat horizons, form a sequence that provides a nearly continuous record of the Holocene explosive activity (e.g., Bazanova and Pevzner, 2001;Braitseva et al, 1998Braitseva et al, , 1996Braitseva et al, , 1995Braitseva et al, , 1997Kyle et al, 2011;Pevzner, 2010;Pevzner et al, 1998;Ponomareva et al, 2015aPonomareva et al, , b, 2017. Earlier pre-Holocene pyroclastic products are mostly ignimbrite (pumiceous or welded tuffs), which survived through glacial stages better than loose pyroclastics and in many cases experienced alteration (Bindeman et al, 2019(Bindeman et al, , 2010Ponomareva et al, 2018;Seligman et al, 2014). These deposits are partly eroded by glacial processes, buried by younger deposits, and/or covered with dense vegetation, which hampers their identification.…”

Section: Volcanoes Of Kamchatka and Studied Samplesmentioning

confidence: 99%

TephraKam: geochemical database of glass compositions in tephra and welded tuffs from the Kamchatka volcanic arc (northwestern Pacific)

Portnyagin

Пономарева

Zelenin

et al. 2020

Earth Syst. Sci. Data

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Abstract. Tephra layers produced by volcanic eruptions are widely used for correlation and dating of various deposits and landforms, for synchronization of disparate paleoenvironmental archives, and for reconstruction of magma origin. Here we present our original database TephraKam, which includes chemical compositions of volcanic glass in tephra and welded tuffs from the Kamchatka volcanic arc. The database contains 7049 single-shard major element analyses obtained by electron microprobe and 738 trace element analyses obtained by laser ablation inductively coupled plasma mass spectrometry on 487 samples collected in close proximity to their volcanic sources in all volcanic zones in Kamchatka. The samples characterize about 300 explosive eruptions, which occurred in Kamchatka from the Miocene up to recent times. Precise or estimated ages for all samples are based on published 39Ar∕40Ar dates of rocks and 14C dates of host sediments, statistical age modeling and geologic relationships with dated units. All data in TephraKam are supported by information about source volcanoes and analytical details. Using the data, we present an overview of geochemical variations in Kamchatka volcanic glasses and discuss applications of these data for precise identification of tephra layers, their source volcanoes, and temporal and spatial geochemical variations in pyroclastic rocks in Kamchatka. The data files described in this paper are available on ResearchGate at https://doi.org/10.13140/RG.2.2.23627.13606 (Portnyagin et al., 2019).

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“…Cao et al (1995) and Prueher and Rea (2001) identified and stratigraphically dated 450 ash layers from IDDP sites 883 (N51.1983, E167.7688) and 882 (N50.3633, E167.600) ∼800 km southeast of Karymshina. We examined 5 of the thickest layers from the 1.6-1.9 Ma interval that could overlap with the 1.78 ± 0.02 Ma Karymshina ignimbrite age given analytical uncertainties and potential offset between stratigraphic and radiometric ages described in Ponomareva et al (2018). For Hole 883, we studied intervals 7H6 (92-93 cm, 1.621 Ma, 10 cm-thick; 116-117 cm, 1.629 Ma, 8 cm-thick) and 8H-3 (128-129 cm, 1.902 Ma, 10 cmthick).…”

Section: Deep Sea Sediment Recordmentioning

confidence: 99%

“…Zr/Y and La/Th: 882-3H-5 at 85-86 cm, 883-7H-6 at 92-93 cm, and 883-7H-6 at 116-117 cm. Ponomareva et al (2018) recently identified Pauzhetka ash in cores from the Pacific and the Sea of Okhotsk via trace elemental match of and calibrated its astrochronologic age to 0.426 Ma.…”

Section: Pacific Sediment Cores and 178 Ma Karymshina Eruptionmentioning

confidence: 99%

Isotopic and Petrologic Investigation, and a Thermomechanical Model of Genesis of Large-Volume Rhyolites in Arc Environments: Karymshina Volcanic Complex, Kamchatka, Russia

et al. 2019

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The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of >8 cm/yr subduction convergence rate and thick continental crust generates large silicic magma chambers, reflected by abundant large calderas and caldera complexes. This study examines the largest center of silicic 4-0.5 Ma Karymshina Volcanic Complex, which includes the 25 × 15 km Karymshina caldera, the largest in Kamchatka. A series of rhyolitic tuff eruptions at 4 Ma were followed by the main eruption at 1.78 Ma and produced an estimated 800 km 3 of rhyolitic ignimbrites followed by high-silica rhyolitic post-caldera extrusions. The postcaldera domes trace the 1.78 Ma right fracture and form a continuous compositional series with ignimbrites. We here present results of a geologic, petrologic, and isotopic study of the Karymshina eruptive complex, and present new Ar-Ar ages, and isotopic values of rocks for the oldest pre-1.78 Ma caldera ignimbrites and intrusions, which include a diversity of compositions from basalts to rhyolites. Temporal trends in δ 18 O, 87 Sr/ 86 Sr, and 144 Nd/ 143 Nd indicate values comparable to neighboring volcanoes, increase in homogeneity, and temporal increase in mantle-derived Sr and Nd with increasing differentiation over the last 4 million years. Data are consistent with a batholithic scale magma chamber formed by primarily fractional crystallization of mantle derived composition and assimilation of Cretaceous and younger crust, driven by basaltic volcanism and mantle delaminations. All rocks have 35-45% quartz, plagioclase, biotite, and amphibole phenocrysts. Rhyolite-MELTS crystallization models favor shallow (2 kbar) differentiation conditions and varying quantities of assimilated amphibolite partial melt and hydrothermally-altered silicic rock. Thermomechanical modeling with a typical 0.001 km 3 /yr eruption rate of hydrous basalt into a 38 km Kamchatkan arc crust produces two magma bodies, one near the Moho and the other engulfing the entire section of upper crust. Rising basalts are trapped in the lower portion of an upper crustal magma body, which exists in a partially molten to solid state. Differentiation products of basalt periodically mix with the resident magma diluting its crustal isotopic signatures. Bindeman et al. Isotopic and Thermomechanical Model of Karymshina Caldera At the end of the magmatism crust is thickened by 8 km. Thermomechanical modeling show that the most likely way to generate large spikes of rhyolitic magmatism is through delamination of cumulates and mantle lithosphere after many millions of years of crustal thickening. The paper also presents a chemical dataset for Pacific ashes from ODDP 882 and 883 and compares them to Karymshina ignimbrites and two other Pleistocene calderas studied by us in earlier works.

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Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal

Cited by 16 publications

References 50 publications

Middle to late Pleistocene record of explosive volcanic eruptions in marine sediments offshore Kamchatka (Meiji Rise, NW Pacific)

Middle to late Pleistocene record of explosive volcanic eruptions in marine sediments offshore Kamchatka (Meiji Rise, NW Pacific)

TephraKam: geochemical database of glass compositions in tephra and welded tuffs from the Kamchatka volcanic arc (northwestern Pacific)

Isotopic and Petrologic Investigation, and a Thermomechanical Model of Genesis of Large-Volume Rhyolites in Arc Environments: Karymshina Volcanic Complex, Kamchatka, Russia

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