FN Archimer Export Format
PT J
TI A 6.2 Ma‐Long Record of Major Explosive Eruptions From the NW Pacific Volcanic Arcs Based on the Offshore Tephra Sequences on the Northern Tip of the Emperor Seamount Chain
BT 
AF Ponomareva, V. V.
   Portnyagin, M. V.
   Bubenshchikova, N. V.
   Zelenin, E. A.
   Derkachev, A. N.
   Jicha, B.
   Gorbarenko, S. A.
   Cook, E.
   Garbe‐Schönberg, D.
   Hoernle, K.
AS 1:1;2:2;3:3;4:4;5:5;6:6;7:5;8:7;9:8,9;10:2,8;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;
C1 Institute of Volcanology and Seismology Petropavlovsk‐Kamchatsky, Russia
   GEOMAR Helmholtz Center for Ocean Research Kiel Kiel ,Germany
   Shirshov Institute of Oceanology Moscow ,Russia
   Geological Institute Moscow, Russia
   V.I. Il'ichev Pacific Oceanological Institute Vladivostok, Russia
   Department of Geoscience University of Wisconsin Madison Madison WI ,USA
   Physics of Ice, Climate and Earth (PICE) Niels Bohr Institute University of Copenhagen Copenhagen ,Denmark
   Kiel University Kiel, Germany
   Department of Physics and Earth Sciences Jacobs University Bremen Bremen ,Germany
C2 INST VOLCANOLOGY SEISMOLOGY, RUSSIA
   IFM GEOMAR, GERMANY
   PP SHIRSHOV OCEANOL INST, RUSSIA
   GEOLOGICAL INST, RUSSIA
   PACIFIC OCEANOLOGICAL INST, RUSSIA
   UNIV WISCONSIN, USA
   UNIV COPENHAGEN, DENMARK
   UNIV KIEL, GERMANY
   UNIV BREMEN, GERMANY
IN DOAJ
IF 3.5
TC 0
UR https://archimer.ifremer.fr/doc/00863/97477/106389.pdf
   https://archimer.ifremer.fr/doc/00863/97477/106392.docx
   https://archimer.ifremer.fr/doc/00863/97477/106393.txt
   https://archimer.ifremer.fr/doc/00863/97477/106394.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106395.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106396.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106397.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106398.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106399.xlsx
   https://archimer.ifremer.fr/doc/00863/97477/106400.xlsx
LA English
DT Article
CR MD 122 / WEPAMA
BO Marion Dufresne
AB We present a continuous ∼6.2 Ma long record of explosive activity from the Northwest Pacific volcanic arcs based on a composite tephra sequence derived from Ocean Drilling Program Sites 882A and 884B, and core MD01‐2416 on the Detroit Seamount. Geochemical fingerprinting of tephra glass using major and trace element analyses and correlations of tephra layers between the three cores allowed the identification of 119 unique tephras, suggesting eruptions of magnitude (M) of 5.8–7.8. Age estimates for all the identified eruptions were obtained with the help of published and further refined age models for the studied cores, direct 40Ar/39Ar dating of four ash layers, and Bayesian age modeling. The glass compositions vary from low‐ to high‐K2O basaltic andesite to rhyolite and exhibit typical subduction‐related affinity. The majority of the tephras originated from Kamchatka, only a few tephras—from the neighboring Kuril and Aleutian arcs. The glass compositions revealed no temporal trends but made it possible to identify their source volcanic zones in Kamchatka and, in some cases, to determine their source eruptive centers. Our data indicates episodes of explosive activity recorded in the Detroit tephra sequence at ∼6,200, 5,600–5,000, 4,300–3,700 ka, and almost continuous activity since ∼3,000 ka. Within the latter episode, the most active intervals can be identified at 1,700–1,600, 1,150–1,050, and 600–50 ka. Geochemically fingerprinted and dated Detroit tephra sequence form a framework for dating and correlating diverse paleoenvironmental archives across the Northwest Pacific and for studies of geochemical evolution of the adjacent volcanic arcs. 
PY 2023
PD DEC
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU American Geophysical Union (AGU)
VL 24
IS 12
UT 001118076400001
DI 10.1029/2023GC011126
ID 97477
ER

EF