Research output: Contribution to journal › Article › peer-review
A Long-Lived Center of Gas–Fluid Emanations on the Western Slope of the Kuril Basin (Sea of Okhotsk). / Derkachev, A. N.; Nikolaeva, N. A.; Tsoy, I. B.; Baranov, B. V.; Barinov, N. N.; Mozherovskiy, A. V.; Krylov, A. A.; Kuznetsov, A. B.; Minami, H.; Hachikubo, A.
In: Lithology and Mineral Resources, Vol. 56, No. 4, 07.07.2021, p. 309-332.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - A Long-Lived Center of Gas–Fluid Emanations on the Western Slope of the Kuril Basin (Sea of Okhotsk)
AU - Derkachev, A. N.
AU - Nikolaeva, N. A.
AU - Tsoy, I. B.
AU - Baranov, B. V.
AU - Barinov, N. N.
AU - Mozherovskiy, A. V.
AU - Krylov, A. A.
AU - Kuznetsov, A. B.
AU - Minami, H.
AU - Hachikubo, A.
N1 - Publisher Copyright: © 2021, Pleiades Publishing, Inc.
PY - 2021/7/7
Y1 - 2021/7/7
N2 - Abstract: The paper presents the results of multidisciplinary studies in the carbonate–barite mineralization area revealed on the western slope of the Kuril deep-water basin in the Sea of Okhotsk. Findings of carbonate concretions and barite in different age (Miocene–Holocene) deposits indicate that the bottom of this area hosted a long-lived center of gas–fluid emanations over several million years. The age of the host deposits was determined based on the diatom analysis: the oldest age corresponds to the Late Miocene (7.67‒6.57 Ma). The carbonate–barite mineralization originated due to the migration of hydrocarbon (mainly methane) and Ba-containing gas–fluid flows derived from both near-surface reservoirs and deep sources. The flows were most likely associated with mud volcanism. Hydrocarbon gases in pore fluids of the sediment are enriched in heavy methane homologues, while carbonate concretions are characterized by a heavier oxygen isotope composition. The Sr isotope composition (87Sr/86Sr) is significantly lower (0.708581) compared to the water of modern sea basins, which may also indicate the deep nature of fluids. Modern activity is expressed in the episodic manifestation of gas flows as strong hydroacoustic anomalies in the water core.
AB - Abstract: The paper presents the results of multidisciplinary studies in the carbonate–barite mineralization area revealed on the western slope of the Kuril deep-water basin in the Sea of Okhotsk. Findings of carbonate concretions and barite in different age (Miocene–Holocene) deposits indicate that the bottom of this area hosted a long-lived center of gas–fluid emanations over several million years. The age of the host deposits was determined based on the diatom analysis: the oldest age corresponds to the Late Miocene (7.67‒6.57 Ma). The carbonate–barite mineralization originated due to the migration of hydrocarbon (mainly methane) and Ba-containing gas–fluid flows derived from both near-surface reservoirs and deep sources. The flows were most likely associated with mud volcanism. Hydrocarbon gases in pore fluids of the sediment are enriched in heavy methane homologues, while carbonate concretions are characterized by a heavier oxygen isotope composition. The Sr isotope composition (87Sr/86Sr) is significantly lower (0.708581) compared to the water of modern sea basins, which may also indicate the deep nature of fluids. Modern activity is expressed in the episodic manifestation of gas flows as strong hydroacoustic anomalies in the water core.
KW - age of carbonate–barite mineralization
KW - gas–fluid emanations
KW - Kuril Basin
UR - http://www.scopus.com/inward/record.url?scp=85109652787&partnerID=8YFLogxK
U2 - 10.1134/S0024490221040027
DO - 10.1134/S0024490221040027
M3 - Article
AN - SCOPUS:85109652787
VL - 56
SP - 309
EP - 332
JO - Lithology and Mineral Resources
JF - Lithology and Mineral Resources
SN - 0024-4902
IS - 4
ER -
ID: 88895969