Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal
Highlights • First identification of distal tephra from the Pauzhetka caldera offshore Kamchatka. • Geochemical correlation of Pauzhetka proximal altered ignimbrite to distal tephra. • Pauzhetka caldera-forming eruption has an astrochronologic age of 421.2 ± 6.6 ka. • The eruption had DRE volume of...
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ftoceanrep:oai:oceanrep.geomar.de:44497 2023-05-15T16:58:53+02:00 Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal Ponomareva, Vera Bubenshchikova, Natalia Portnyagin, Maxim Zelenin, Egor Derkachev, Alexander Gorbarenko, Sergey Garbe-Schönberg, Dieter Bindeman, Ilya 2018-10-15 text other https://oceanrep.geomar.de/id/eprint/44497/ https://oceanrep.geomar.de/id/eprint/44497/1/Ponomareva.pdf https://oceanrep.geomar.de/id/eprint/44497/6/Ponomareva%20et%20al_Electronic%20Supplement%20Tables.xlsx https://doi.org/10.1016/j.jvolgeores.2018.10.006 en eng Elsevier https://oceanrep.geomar.de/id/eprint/44497/1/Ponomareva.pdf https://oceanrep.geomar.de/id/eprint/44497/6/Ponomareva%20et%20al_Electronic%20Supplement%20Tables.xlsx Ponomareva, V., Bubenshchikova, N., Portnyagin, M. , Zelenin, E., Derkachev, A., Gorbarenko, S., Garbe-Schönberg, D. and Bindeman, I. (2018) Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal. Journal of Volcanology and Geothermal Research, 366 . pp. 1-12. DOI 10.1016/j.jvolgeores.2018.10.006 <https://doi.org/10.1016/j.jvolgeores.2018.10.006>. doi:10.1016/j.jvolgeores.2018.10.006 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1016/j.jvolgeores.2018.10.006 2023-04-07T15:41:35Z Highlights • First identification of distal tephra from the Pauzhetka caldera offshore Kamchatka. • Geochemical correlation of Pauzhetka proximal altered ignimbrite to distal tephra. • Pauzhetka caldera-forming eruption has an astrochronologic age of 421.2 ± 6.6 ka. • The eruption had DRE volume of 150–170 km3 and magnitude of 7.60–7.65. • Pauzhetka tephra marks Termination V in the NW Pacific and Okhotsk Sea sediments. Correlation of individual tephra layers over large areas permits the assessment of eruption magnitude and synchronization of disparate sedimentary archives. The middle Pleistocene Pauzhetka caldera with a diameter of ~30 km is one of the largest in Kamchatka. Distal tephra from the caldera-forming eruption has, however, never been found, hampering precise estimates of the eruption volume and magnitude. In this paper, we report first geochemical identification of distal tephra from the Pauzhetka caldera in the Northwest (NW) Pacific and Okhotsk Sea sediments recovered by ODP 145 cores 881B, 882A and 884B, and IMAGES cores MD01-2415 and MD01-2416. Distal tephras are rhyolites of narrow compositional range allowing their reliable identification among the studied marine cores using major and trace element data. Geochemical correlation of the distal tephra to the proximal strongly welded and altered ignimbrite was performed based on immobile trace elements determined in situ by laser ablation ICP-MS. Based on this case study, we propose that a number of trace elements (U, Th, Nb, Ta, Zr, Hf, Ti, REE, Y and Sc) are immobile during on-shore alteration of welded tuffs and can be used for correlation of pristine glass and altered rock groundmass allowing direct identification of volcanic source of distal tephra. Our new data on the spatial dispersal of the airborne Pauzhetka tephra in the NW Pacific sediments defines its minimum dense rock equivalent (DRE) volume of ~46 km3. Together with the exposed volcanic material around the caldera, the total DRE volume is estimated at 150–170 km3 (3.8–4.4 × 105 Mt) ... Article in Journal/Newspaper Kamchatka okhotsk sea OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Okhotsk Pacific Pauzhetka ENVELOPE(156.807,156.807,51.463,51.463) Journal of Volcanology and Geothermal Research 366 1 12 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Highlights • First identification of distal tephra from the Pauzhetka caldera offshore Kamchatka. • Geochemical correlation of Pauzhetka proximal altered ignimbrite to distal tephra. • Pauzhetka caldera-forming eruption has an astrochronologic age of 421.2 ± 6.6 ka. • The eruption had DRE volume of 150–170 km3 and magnitude of 7.60–7.65. • Pauzhetka tephra marks Termination V in the NW Pacific and Okhotsk Sea sediments. Correlation of individual tephra layers over large areas permits the assessment of eruption magnitude and synchronization of disparate sedimentary archives. The middle Pleistocene Pauzhetka caldera with a diameter of ~30 km is one of the largest in Kamchatka. Distal tephra from the caldera-forming eruption has, however, never been found, hampering precise estimates of the eruption volume and magnitude. In this paper, we report first geochemical identification of distal tephra from the Pauzhetka caldera in the Northwest (NW) Pacific and Okhotsk Sea sediments recovered by ODP 145 cores 881B, 882A and 884B, and IMAGES cores MD01-2415 and MD01-2416. Distal tephras are rhyolites of narrow compositional range allowing their reliable identification among the studied marine cores using major and trace element data. Geochemical correlation of the distal tephra to the proximal strongly welded and altered ignimbrite was performed based on immobile trace elements determined in situ by laser ablation ICP-MS. Based on this case study, we propose that a number of trace elements (U, Th, Nb, Ta, Zr, Hf, Ti, REE, Y and Sc) are immobile during on-shore alteration of welded tuffs and can be used for correlation of pristine glass and altered rock groundmass allowing direct identification of volcanic source of distal tephra. Our new data on the spatial dispersal of the airborne Pauzhetka tephra in the NW Pacific sediments defines its minimum dense rock equivalent (DRE) volume of ~46 km3. Together with the exposed volcanic material around the caldera, the total DRE volume is estimated at 150–170 km3 (3.8–4.4 × 105 Mt) ... |
format |
Article in Journal/Newspaper |
author |
Ponomareva, Vera Bubenshchikova, Natalia Portnyagin, Maxim Zelenin, Egor Derkachev, Alexander Gorbarenko, Sergey Garbe-Schönberg, Dieter Bindeman, Ilya |
spellingShingle |
Ponomareva, Vera Bubenshchikova, Natalia Portnyagin, Maxim Zelenin, Egor Derkachev, Alexander Gorbarenko, Sergey Garbe-Schönberg, Dieter Bindeman, Ilya Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
author_facet |
Ponomareva, Vera Bubenshchikova, Natalia Portnyagin, Maxim Zelenin, Egor Derkachev, Alexander Gorbarenko, Sergey Garbe-Schönberg, Dieter Bindeman, Ilya |
author_sort |
Ponomareva, Vera |
title |
Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
title_short |
Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
title_full |
Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
title_fullStr |
Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
title_full_unstemmed |
Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal |
title_sort |
large-magnitude pauzhetka caldera-forming eruption in kamchatka: astrochronologic age, composition and tephra dispersal |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44497/ https://oceanrep.geomar.de/id/eprint/44497/1/Ponomareva.pdf https://oceanrep.geomar.de/id/eprint/44497/6/Ponomareva%20et%20al_Electronic%20Supplement%20Tables.xlsx https://doi.org/10.1016/j.jvolgeores.2018.10.006 |
long_lat |
ENVELOPE(156.807,156.807,51.463,51.463) |
geographic |
Okhotsk Pacific Pauzhetka |
geographic_facet |
Okhotsk Pacific Pauzhetka |
genre |
Kamchatka okhotsk sea |
genre_facet |
Kamchatka okhotsk sea |
op_relation |
https://oceanrep.geomar.de/id/eprint/44497/1/Ponomareva.pdf https://oceanrep.geomar.de/id/eprint/44497/6/Ponomareva%20et%20al_Electronic%20Supplement%20Tables.xlsx Ponomareva, V., Bubenshchikova, N., Portnyagin, M. , Zelenin, E., Derkachev, A., Gorbarenko, S., Garbe-Schönberg, D. and Bindeman, I. (2018) Large-magnitude Pauzhetka caldera-forming eruption in Kamchatka: Astrochronologic age, composition and tephra dispersal. Journal of Volcanology and Geothermal Research, 366 . pp. 1-12. DOI 10.1016/j.jvolgeores.2018.10.006 <https://doi.org/10.1016/j.jvolgeores.2018.10.006>. doi:10.1016/j.jvolgeores.2018.10.006 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2018.10.006 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
366 |
container_start_page |
1 |
op_container_end_page |
12 |
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1766051013018517504 |