Energy balance of the Earth’s tectonosphere

Gordienko, V. V.

doi:10.24028/gzh.0203-3100.v37i5.2015.111144

Cited by 2 publications

(22 citation statements)

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“…В то же время автору казалось рациональным впервые рассмотреть развернутую версию гипотезы. Поэтому представляется полезным дополнить разделеще несколькими, в которых можно было бы подробнее и с большей обоснованностью изложить представления об источнике энергии, докембрийской истории платформ мира, глубинах магматических очагов в мантии, развитии фанерозойских геосинклиналей, рифтов, регионов современной активизации, океанов и переходных зон разного типа, сейсмичности и происхождении месторождений полезных ископаемых (Gordienko, 2001, 2015a,b,с,d, 2016a,b, Gordienko et al, 1985, 2016.…”

Section: выводыunclassified

“…Одним из доказательств адвективного характера тепломассопереноса в тектоносфере в периоды активизации являются скоростные разрезы верхней мантии. Некоторые из них (например, альпийских геосинклиналей Альп и Кавказа) приведены в (Gordienko, 2015a), где сравнены с скоростной моделью неактивизированной докембрийской платформы. Сопоставляя последнюю с тепловой моделью (рис.…”

Section: квант тектонического действияunclassified

“…Отражающие это событие скоростные разрезы фиксируют глубину центра ячейки совпадением значения V p в разрезах платформы и альпийской геосинклинали. Она оказывается примерно на 220 км (Gordienko, 2015a).…”

Section: квант тектонического действияunclassified

“…Один из примеров выделения КТД в верхних горизонтах мантии по данным сейсмологии и геоэлектрики, демонстрирующий ограниченность объекта по глубине, показан в (Gordienko, 2015a).…”

Section: квант тектонического действияunclassified

“…Можно утверждать, что длительность этого события меньше минимального перерыва между двумя активизациями, т.е. двадцати млн лет (Gordienko, 2015b). Используя установленные автором по составу, минералогии и температуре характеристики свойств пород мантии платформ (Гордиенко, 2012 и др.…”

Section: квант тектонического действияunclassified

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The Nature of Enderbites From Bug Area According to the Data of Sm-Nd, U-Pb and Lu-Hf Methods

Lisna¹,

Ponomarenko²,

Shumlyanskyy³

et al. 2023

Mìneral. ž.

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As a result of the mineralogical and isotopic-geochemical study of U-Pb, Lu-Hf, isotopic systems of zircons from Pobug enderbites, the existence of crustal and juvenile enderbites was established. Negative values of (εNd) and negative values of εHf in zircons from enderbito-gneisses of the Middle Bouh area, Lityn enderbite, and Sabariv enderbite indicate their crustal nature, origin by account of older (Eoarchean?) rocks series, the protolith for which was probably mafic protocrust. The transformation of these rocks occurred pulsatingly 3.6-3.4, 3.0-2.8 and 2.1-1.9 billion years ago. The presence of "typomorphic" zircons in enderbites is also evidence of their crustal nature. Juvenile enderbites 117/79, from the quarry in Tyvriv and 127/79 from the quarry in the village of Holoskove have positive εNd and positive εHf values in zircons, indicating their formation from a juvenile source. They are 2080 and 2070 million years old, respectively. It is believed that it is the juvenile rocks that give increase to the continental crust, which is consistent with the idea that the growth of continents was accompanied by the addition of new sialic material from the mantle. At the same time, rocks that are an addition to the сгust may not differ in composition from older rocks. The available isotopic-geochemical and geological data indicate at least three stages of formation of enderbites (TTG association) within the Pobug granulite belt. The oldest of them is represented by enderbites (enderbito-gneisses) of the Haivoron complex. The next TTG association (Lityn complex, ~2.8 billion years ago) is more widespread, and in general forms a wide "shell" around the protocontinental core, formed by the rocks of the Haivoron complex. The youngest TTG association in the borders of the Pobug granulite belt (Berdychiv complex) is often represented by numerous intrusive bodies of juvenile enderbites, with xenoliths of more ancient rocks.

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Section: выводыunclassified

Section: квант тектонического действияunclassified

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The Nature of Enderbites From Bug Area According to the Data of Sm-Nd, U-Pb and Lu-Hf Methods

Lisna¹,

Ponomarenko²,

Shumlyanskyy³

et al. 2023

Mìneral. ž.

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P-velocity of the upper mantle

Gordienko

2021

GZh

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The authors have constructed models featuring seismic P-wave velocity distribution in the upper mantle beneath oceanic, continental and transition regions, such as mid-ocean ridges, basins, trenches, island arcs, and back-arc troughs, Atlantic transitional zones, flanking plateaus of mid-ocean ridges, platforms, geosynclines, rifts, recent activation zones. The models are in agreement with the deep-seated processes in the tectonosphere as predicted in terms of the advection-polymorphism hypothesis. The models for areas of island arcs and coastal ridges are similar to those for alpine geosynclines disturbed by recent activation. The models for areas of mid-ocean ridges and back-arc troughs are identical. They fit the pattern of recent heat-and-mass transfer in the case of rifting, which, given the basic crust with continental thickness, leads to oceanization. The model for the basin reflects the effect of thermal anomalies smoothing beneath mid-ocean ridges or back-arc troughs about 60 million years later. The model for the trench and flanking plateau reflects the result of lateral heating of the mantle’s upper layers beneath the quiescent block from the direction of the island arc and basin (trench) and mid-ocean ridge and basin (flanking plateau). A detailed bibliography on regions covered by studies was presented in the authors’ earlier publications over past eight years. There are quite significant differences between models for regions of the same type that are described in publications of other authors. This is largely due to the fact that individual authors adopt a priori concepts on the velocity structure of the upper mantle. High variability of seismic P-wave velocities within the subsurface depth interval has been detected as a result of all sufficiently detailed studies. This variability is responsible for the sharp increase in the scatter of arrival times of waves from earthquakes at small angular distances. The corresponding segments of travel-time graphs were simply ignored, and the graphs started from about 3° after which the scatter of arrival time acquired a stable character. Accordingly, velocity profiles were constructed, as a rule, starting from depths of about 50 km. The constructed velocity profiles vary little from region to region with the same type of endogenous regimes. This enables us to maintain that the models represent standard (typical) VP distributions in the mantle beneath the regions, just as presumed in terms of the theory.

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Energy balance of the Earth’s tectonosphere

Cited by 2 publications

References 0 publications

The Nature of Enderbites From Bug Area According to the Data of Sm-Nd, U-Pb and Lu-Hf Methods

The Nature of Enderbites From Bug Area According to the Data of Sm-Nd, U-Pb and Lu-Hf Methods

P-velocity of the upper mantle

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