Research output: Contribution to journal › Article › peer-review
Trace element and Sr isotopic composition of bottom and near-surface oceanic water in the southern region of the Emperor Ridge. / Vishnevskaya, I. A.; Okuneva, T. G.; Kiseleva, D. V. et al.
In: Marine Chemistry, Vol. 224, 103808, 20.08.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Trace element and Sr isotopic composition of bottom and near-surface oceanic water in the southern region of the Emperor Ridge
AU - Vishnevskaya, I. A.
AU - Okuneva, T. G.
AU - Kiseleva, D. V.
AU - Soloshenko, N. G.
AU - Streletskaya, M. V.
AU - Vosel, Yu S.
N1 - Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/8/20
Y1 - 2020/8/20
N2 - During the 86th voyage of the research vessel “Akademik M.A. Lavrentiev” (July–August 2019), near-bottom and near-surface water samples (at a depth of 10 m) were taken in the immediate vicinity and above the Koko, Jingu, Nintoku, and Suiko seamounts in the southern part of the Emperor seamount chain. Trace element concentrations (including REE) in these samples are higher than in the IAPSO Standard Atlantic Seawater. The distribution and mutual correlations of elements involved in biochemical processes indicate an active role of plankton in the accumulation of these elements, as well as an increase in its amount with increasing water temperature. 87Sr/86Sr ratios in water samples vary from 0.70891 to 0.70917. Moreover, near-bottom water, taken farther south of 44°N, is more radiogenic than near-surface. This difference can be explained by the dilution of the surface layer with meteoric water, because at the time of sample collection over the Koko, Jingu, and Nintoku seamounts it was raining daily, while no rainfall was observed over the Suiko seamount during the sample collection and the week before it. The rapid restoration of isotopic equilibrium indicates a high rate of vertical mixing of ocean water, which was indicated by the earlier studies of oceanic water chemical composition.
AB - During the 86th voyage of the research vessel “Akademik M.A. Lavrentiev” (July–August 2019), near-bottom and near-surface water samples (at a depth of 10 m) were taken in the immediate vicinity and above the Koko, Jingu, Nintoku, and Suiko seamounts in the southern part of the Emperor seamount chain. Trace element concentrations (including REE) in these samples are higher than in the IAPSO Standard Atlantic Seawater. The distribution and mutual correlations of elements involved in biochemical processes indicate an active role of plankton in the accumulation of these elements, as well as an increase in its amount with increasing water temperature. 87Sr/86Sr ratios in water samples vary from 0.70891 to 0.70917. Moreover, near-bottom water, taken farther south of 44°N, is more radiogenic than near-surface. This difference can be explained by the dilution of the surface layer with meteoric water, because at the time of sample collection over the Koko, Jingu, and Nintoku seamounts it was raining daily, while no rainfall was observed over the Suiko seamount during the sample collection and the week before it. The rapid restoration of isotopic equilibrium indicates a high rate of vertical mixing of ocean water, which was indicated by the earlier studies of oceanic water chemical composition.
KW - Sr/Sr ratio
KW - Emperor chain
KW - Hawaiian Emperor bend
KW - North Pacific Ocean
KW - Ocean water composition
KW - Vertical mixing
KW - PROFILES
KW - PARTICLES
KW - PACIFIC
KW - ATLANTIC
KW - NEODYMIUM ISOTOPES
KW - STRATIGRAPHY
KW - SEA
KW - STRONTIUM
KW - Sr-87/Sr-86 ratio
KW - RARE-EARTH-ELEMENTS
KW - PROVENANCE
UR - http://www.scopus.com/inward/record.url?scp=85083512614&partnerID=8YFLogxK
U2 - 10.1016/j.marchem.2020.103808
DO - 10.1016/j.marchem.2020.103808
M3 - Article
AN - SCOPUS:85083512614
VL - 224
JO - Marine Chemistry
JF - Marine Chemistry
SN - 0304-4203
M1 - 103808
ER -
ID: 24094509