Geodynamic evolution of the lithosphere in the Sea of Okhotsk region: from geophysical data.

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dc.contributor.author Verzhbitsky, Evgeny V
dc.contributor.author Kononov, Mikhail V
dc.coverage.spatial MEDIAN LATITUDE: 50.828543 * MEDIAN LONGITUDE: 147.918480 * SOUTH-BOUND LATITUDE: 46.053000 * WEST-BOUND LONGITUDE: 139.476400 * NORTH-BOUND LATITUDE: 57.953300 * EAST-BOUND LONGITUDE: 156.650000
dc.date.accessioned 2019-11-23T11:53:58Z
dc.date.available 2019-11-23T11:53:58Z
dc.date.issued 2006-10-06
dc.identifier https://doi.pangaea.de/10.1594/PANGAEA.745952
dc.identifier https://doi.org/10.1594/PANGAEA.745952
dc.identifier.citation Verzhbitsky, Evgeny V; Kononov, Mikhail V (2006): Geodynamic evolution of the lithosphere in the Sea of Okhotsk region: from geophysical data. Fizika Zemli (Physics of the Earth), No 6, 47-59
dc.identifier.uri https://repository.geologyscience.ru/handle/123456789/7349
dc.description.abstract Tectonic structure and anomalous distributions of geophysical fields of the Sea of Okhotsk region are considered; the lack of reliable data on age of the lithosphere beneath basins of various origin in the Sea of Okhotsk is noted. Model calculations based on geological and geophysical data yielded 65 Ma (Cretaceous-Paleocene boundary) age for the Central Okhotsk rise underlain by the continental lithosphere. This estimate agrees with the age (the end of Cretaceous) derived from seismostratigraphic data. A comparative analysis of theoretical and measured heat flows in the Akademii Nauk Rise, underlain by the thinned continental crust, is performed. The analysis points to a higher (by 20%) value of the measured thermal background of the rise, which is consistent with high negative gradient of gravity anomalies in this area. Calculations yielded 36 Ma (Early Oligocene) age and lithosphere thickness of 50 km for the South Okhotsk depression, whose seafloor was formed by processes of back-arc spreading. The estimated age of the depression is supported by kinematic data on the region; the calculated thickness of the lithosphere coincides with the value estimated from data of magnetotelluric sounding here. This indicates that formation time (36 Ma) of the South Okhotsk depression was estimated correctly. Numerical modeling performed for determination of the basement age of rifting basins in the Sea of Okhotsk gave the following estimates: 18 Ma (Early Miocene) for the Deryugin Basin, 12 Ma (Middle Miocene) for the TINRO Basin, and 23 Ma (Late Oligocene) for the West Kamchatka Trough. These estimates agree with formation time (Oligocene-Quaternary) of the sedimentary cover in rifting basins of the Sea of Okhotsk derived from geological and geophysical data. Model temperature estimates are obtained for lithologic and stratigraphic boundaries of the sedimentary cover in the Deryugin and TINRO Basins and the West Kamchatka Trough; the temperature analysis indicates that the latter two structures are promising for oil and hydrocarbon gas generation; the West Kamchatka Trough possesses better reservoir properties compared to the TINRO and Deryugin Basins. The latter is promising for generation of hydrocarbon gas. Paleogeodynamic reconstructions of the Sea of Okhotsk region evolution are obtained for times of 90, 66, and 36 Ma on the base of kinematic, geomagnetic, structural, tectonic, geothermal, and other geological and geophysical data.
dc.format text/tab-separated-values, 88 data points
dc.language.iso en
dc.publisher PANGAEA
dc.rights CC-BY-3.0: Creative Commons Attribution 3.0 Unported
dc.rights Access constraints: unrestricted
dc.source P.P. Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow
dc.source Supplement to: Verzhbitsky, Evgeny V; Kononov, Mikhail V (2006): Geodynamic evolution of the lithosphere in the Sea of Okhotsk region: from geophysical data. Fizika Zemli (Physics of the Earth), No 6, 47-59
dc.subject Archive of Ocean Data
dc.subject ARCOD
dc.subject Area/locality
dc.subject Heat flow
dc.subject Kamchatka Peninsula
dc.subject Sakhalin Island
dc.subject Sea of Okhotsk
dc.subject Tatar Strait
dc.subject VK06-1
dc.subject VK06-10
dc.subject VK06-11
dc.subject VK06-12
dc.subject VK06-13
dc.subject VK06-14
dc.subject VK06-15
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dc.subject VK06-5
dc.subject VK06-6
dc.subject VK06-7
dc.subject VK06-8
dc.subject VK06-9
dc.title Geodynamic evolution of the lithosphere in the Sea of Okhotsk region: from geophysical data.
dc.title.alternative Heat flow values in the Sea of Okhotsk region
dc.type Dataset


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