Lithosphere structure of the Black Sea from 3-D gravity analysis and seismic tomography

Yegorova, Tamara; Gobarenko, V. S.; Yanovskaya, T. B.

doi:10.1093/gji/ggs098

Cited by 43 publications

(20 citation statements)

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“…After correcting for those factors heat flow increases to 55-60 mWm 2 at a depth of 3-5 km [Kutas, 2003] compared with mean surface value of 35-40 mWm 2 for the EEC. In opposite to the opinion of resemblance of the Black Sea lithosphere to that of the EEC [Yegorova et al, 2013], the upper mantle beneath the Black Sea is characterized by high thermodynamic activity as demonstrated above. Such a high activity in the Black Sea gives strong evidence for its rift origin and young geothermal processes.…”

Section: Along the Dss Profile 25 The Mantle Component Varies Betweenmentioning

confidence: 83%

“…Heat flow of the rift zone forms a broad low, which occupies mostly the WBSB. Patterns of P-wave at a 35-85 km depth revealed differences in the lithosphere structure of the WBSB and EBSB [Yegorova et al, 2013]. There are also velocity perturbations beneath a depth of 50 km in the Black Sea lithosphere [Bugaenko et al, 2008].…”

Section: Along the Dss Profile 25 The Mantle Component Varies Betweenmentioning

confidence: 99%

“…Thermo-mechanical and gravity modeling, seismic tomography have revealed the different lithospheric structure as a whole in the Western and Eastern Black Sea Basins without addressing separate and distinct tectonic elements of the crust [Spadini et al, 1996;Cloetingh et al, 2003;Bugaenko et al, 2008;Nikishin et al, 2011;Yegorova et al, , 2013. The available information is however insufficient to determine comprehensively the relationship between the geological units in the crust and upper mantle that governs substantially the tectonic setting and evolution of the basins.…”

Section: Introductionmentioning

confidence: 99%

“…Seismic data from the Black Sea are briefly presented in this paper because the most essential results are described in full detail by [Starostenko et al, 2004a,b]. Here results are updated because new seismic information has been obtained since that time [Slishinsky et al, 2007;Khriachtchevskaia et al, 2009;Scott et al, 2009;Scott, 2009;Yegorova et al, , 2013Piip, Ermakov, 2011;Stovba et al, 2013;Graham et al, 2013]. All these data were used to constrain parameters of the sedimentary cover in gravity modeling.…”

Section: Introductionmentioning

confidence: 99%

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Heterogeneous structure of the lithosphere in the Black Sea from a multidisciplinary analysis of geophysical fields

Rusakov

Pashkevich

Кутас

et al. 2017

Geofizicheskiy Zhurnal

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Magnetic, gravity, geothermal, seismic and tomographic data from the lithosphere were first jointly examined. A multidisciplinary interpretation has resulted in a new and consistent model for lithospheric density, magnetic, thermal and velocity heterogeneities. Faults of different orders for the crystalline crust have been mapped in details. Large deep fault zones were recognized. Among them is the most prominent Odessa-Sinop-Ordu (OSO) fault zone, which played a key role in the opening and development of the Black Sea Depression. A fundamental difference was revealed between the crustal and mantle structure and geophysical parameters of the Western Black Sea Basin (WBSB) and Eastern Black Sea Basin (EBSB). These dissimilarities are in the size of «non-granitic» crust, pattern and intensity of heat flow, topography of the lower boundary of the thermal lithosphere, mantle seismic velocity and structure of magnetic and residual gravity anomalies. Based on new information it was demonstrated that the WBSB and EBSB were diachronously formed on two large distinct continental blocks with independent post-rift development of the sub-basins. The rifting of the western sub-basin commenced earlier than that of the eastern one. The EBSB is characterized by younger thermal activity than the WBSB and consequently it was stabilized later. The Mid Black Sea High (MBSH) is not a single tectonic unit but is formed by two ridges of various crystalline crustal structure and age shifted relative to each other by the faults of the OSO zone.Key words: The Black Sea basins, magnetics, gravity, heat flow, fault tectonics, seismic tomography, lithosphere heterogeneity.Впервые проведен общий анализ магнитных, гравитационных, геотермических, сейсми-ческих и томографических данных о литосфере Черного моря. В результате комплексной интерпретации получена новая и согласованная модель плотностной, магнитной, термаль-ной и сейсмической неоднородностей литосферы. Построена подробная карта разломов консолидированной коры разных рангов. Выявлены зоны глубинных разломов. Среди них наиболее примечательна зона разлома Одесса-Синоп-Орду, игравшая ключевую роль в рас-крытии и развитии Черноморской впадины. Выявлены фундаментальніе различия в строе-нии и геофизических параметрах коры и литосферы Западно-и Восточно-Черноморской впадин. Эти различия заключаются в размере площади «безгранитной» коры, структуре и интенсивности теплового потока, топографии нижней границы термальной литосферы, осо-бенностях магнитного и остаточного гравитационного полей. На основе новой информации показано, что Западно-и Восточно-Черноморская впадины сформировались в разное время на двух различных крупных блоках континентальной коры с независимым пострифтовым развитием суббассейнов. Рифт в западном бассейне образовался раньше, чем в восточном. Восточно-Черноморская впадина отличается более молодой термической активностью, чем Западно-Черноморская, которая стабилизировалась позже. Центрально-Черноморское под-нятие не представляет собой единую тектоническую единицу, а сформиро...

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Section: Along the Dss Profile 25 The Mantle Component Varies Betweenmentioning

confidence: 83%

Section: Along the Dss Profile 25 The Mantle Component Varies Betweenmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Heterogeneous structure of the lithosphere in the Black Sea from a multidisciplinary analysis of geophysical fields

Rusakov

Pashkevich

Кутас

et al. 2017

Geofizicheskiy Zhurnal

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“…По результатам 3D гравитационного анализа и локальной сейсмической томографии установлено, что морфология рельефа раздела Мохо полностью сопоставима с положительными аномалиями силы тяжести ЗЧВ и ВЧВ и с тектоническим рисунком кровли их меловых отложений (Egorova, Gobarenko, Yanovskaya, & Baranova, 2012;Yegorova, Gobarenko, & Yanovskaya, 2013). Однако обе эти поверхности находятся в инверсионной зависимости.…”

Section: E Xh U M E D M a N Tl E Ex H U M E D M A N T L Eunclassified

Structural, tectonic and fluid-dynamic aspects of deep degassing of the black sea megatrench

Коболев¹

2017

Min. miner. depos.

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Purpose. The problematical and controversial issues related to active gassing, deep structure, formation and evolution of the Black Sea are discussed.Methods. Geological and geophysical data (sonar, seismic and seismological research, involving potential fields' modelling results), obtained in recent years in the Azov-Black Sea region, were subjected to complex interpretation.Findings. It is proved that there is a significant difference in the formation mechanisms of the main structural units of the Black Sea megatrench -the Western and Eastern trenches. Thermodynamic conditions, a limited amount of biomass in the sedimentary filling of the Black Sea megatrench and the confinedness of the gas seeps to the consolidated crust split testify to the abiogenic nature of methane. Interaction of powerful rising hydrocarbon flow with different structures of the sedimentary mantle and basement led to the formation of numerous hydrocarbon deposits in the Black Sea megatrench.Originality. Analysis of the plume-tectonic mechanism of deep degassing made it possible to assess the role of geodynamic factors related both to the evolution of the Black Sea megatrench and the genesis of hydrocarbons from a new perspective.Practical implications. Analysis of deep fluids migration routes and deep energy unloading zones will allow to develop a new strategy for oil and gas deposits exploration and to work out a non-standard approach to the evaluation of hydrocarbon reserves in the Black Sea oil and gas megabasin.

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Seismicity and Crustal Structure of the Southern Crimea and Adjacent Northern Black Sea from Local Seismic Tomography

Gobarenko¹,

Yegorova

2019

Springer Proceedings in Earth and Environmental Sciences

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Lithosphere structure of the Black Sea from 3-D gravity analysis and seismic tomography

Cited by 43 publications

References 50 publications

Heterogeneous structure of the lithosphere in the Black Sea from a multidisciplinary analysis of geophysical fields

Heterogeneous structure of the lithosphere in the Black Sea from a multidisciplinary analysis of geophysical fields

Structural, tectonic and fluid-dynamic aspects of deep degassing of the black sea megatrench

Seismicity and Crustal Structure of the Southern Crimea and Adjacent Northern Black Sea from Local Seismic Tomography

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