Background heat flow values in the region of the Sea of Okhotsk

Particular features of tectonic structure and anomalous distribution of geothermal, geomagnetic, and gravity fields in the region of the Sea of Okhotsk are considered. On the basis of heat flow data, ages of large-scale structures in the Sea of Okhotsk are estimated at 65 Ma for the Central Okhotsk Rise and 36 Ma for the South Okhotsk Basin. Age of the South Okhotsk Basin is confirmed by data on kinematics and corresponds to 50 km thickness of the lithosphere. This is in accordance with thickness value obtained by magnetotelluric soundings. Comparative analysis of model geothermal background and measured heat flow values on the Akademii Nauk Rise is performed. Analysis points to abnormally high (~20%) measured heat flow agrees with high negative gradient of gravity anomalies. Estimates of deep heat flow and basement age of riftogenic basins in the Sea of Okhotsk were carried out in the following areas: Deryugin Basin (18 Ma, Early Miocene), TINRO Basin (12 Ma, Middle Miocene), and West Kamchatka Basin (23 Ma, Late Oligocene). Temperatures at boundaries of the main lithological complexes of the sedimentary cover are calculated and zones of oil and gas generation are defined. On the basis of geothermal, magnetic, structural, and other geological-geophysical data a kinematic model of the region of the Sea of Okhotsk for period of 36 Ma was calculated and constructed

Geothermal measurements in the Tyrrhenian Sea

Geothermal data obtained during Cruise 12 of the R/V Vityaz-II and published data on heat flux of the Tyrrhenian Sea are analyzed. The thermal field is related to principal tectonic structures of the basin. Distribution of heat flux indicates that the initial stage of rifting occurs in the central basin of the Tyrrhenian Sea

Erratum to: Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History (Geotectonics, (2019), 53, 6, (635-657), 10.1134/S0016852119060104)

The article “Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History”, written by A. M. Nikishin, K. F. Startseva, V. E. Verzhbitsky, S. Cloetingh, N. A.Malyshev, E. I. Petrov, H. Posamentier, S. I. Freiman, M. D. Lineva, and N. N. Zhukov, was originally published electronically in SpringerLink on 31 January 2020 without Open Access. After publication in volume 53, issue 6, pages 635–657 the authors decided to make the article an Open Access publication. Therefore, the copyright of the article has been changed t

Erratum to: Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History (Geotectonics, (2019), 53, 6, (635-657), 10.1134/S0016852119060104)

The article “Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History”, written by A. M. Nikishin, K. F. Startseva, V. E. Verzhbitsky, S. Cloetingh, N. A.Malyshev, E. I. Petrov, H. Posamentier, S. I. Freiman, M. D. Lineva, and N. N. Zhukov, was originally published electronically in SpringerLink on 31 January 2020 without Open Access. After publication in volume 53, issue 6, pages 635–657 the authors decided to make the article an Open Access publication. Therefore, the copyright of the article has been changed t

Sedimentary Basins of the East Siberian Sea and the Chukchi Sea and the Adjacent Area of the Amerasia Basin: Seismic Stratigraphy and Stages of Geological History

Abstract: The seismic stratigraphy scheme for the shelf basins of the East Siberian Sea and the Chukchi Sea region and the adjacent deepwater area of the Amerasia basin has been developed, and mega-sequences (or tectonostratigraphic units) with the conventional ages of 125‒100, 100‒80, 80‒66, 66‒56, 46‒45, 45‒34, 34‒20, 20‒0 Ma are distinguished. Zhokhov foredeep basin of the Late Jurassic‒Neocomian age is distinguished between the New Siberia and the De Long islands. Three main phases of rifting are identified on the shelves in the region with ages of 125–100, 66–56, and 45–37 Ma. The main phase of continental rifting occurred in the Podvodnikov and Toll basins at 125‒100 Ma. The typical clinoform accumulation of sediments occurred at the edge of the shelf at 66–20 Ma. We identified three syntectonic epochs of the formation of clinoform sequences with the ages of 66–45, 45–34, and 34–20 Ma. The phase of uplifting and compression in the region of Wrangel Island happened at ≈66 Ma. The relatively monotonous tectonic setting with approximately the same thicknesses of the sedimentary cover began at 20 Ma