Fragment of the Early Paleozoic (∼500 Ma) island arc in the structure of the Olkhon Terrane, Central Asian fold belt

Гладкочуб, Д. П.; Donskaya, T. V.; Федоровский, В. С.; Мазукабзов, А. М.; Sklyarov, E. V.; Лавренчук, А. В.; Lepekhina, E. N.

doi:10.1134/s1028334x14080042

Cited by 24 publications

(17 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Главным в истории ранних каледонид считается рубеж ~570 млн лет [Yarmolyuk et al, 2006]. Именно к этому рубежу приурочено начало формирования большинства надсубдукционных офиолитовых и островодужных ассоциаций по сибирской окраине Палеоазиатского океана: Северо-Саянской (560-540 млн лет), Таннуольско-Хамсаринской (570 млн лет), Баян-Хонгорской (570-540 млн лет), Озерной (570 млн лет), Джидинской (560-540 млн лет), Ангино-Таланчанской (500 млн лет), Удино-Витимской (540 млн лет), Керуленской (570-540 млн лет) островодужных систем [Gordienko, 2006;Yarmolyuk et al, 2006;Rudnev, 2013;Gladkochub et al, 2014;Gordienko, Mikhal'tsov, 2001] (рис. 18).…”

Section: венд-раннепалеозойские островные дуги и проявления плюмовогоunclassified

“…Вулканиты и габброиды обнаруживают близкие слабофракционированные спектры распределения РЗЭ (La/Y, 2.6-3.4). На диаграмме в спектрах габброидов и метабазальтов отмечены хорошо выраженные отрицательные аномалии по Nb, Ta, Ti и положительные аномалии по Sr. Габброиды Бирхинского массива и вулканиты цаганзабинского комплекса обнаруживают близкие положительные величины ƐNd(T)=2.9-4.0 ювенильных источников и значения модельного возраста T Nd (DM)=819-930 млн лет [Gladkochub et al, 2014].…”

Section: венд-раннепалеозойские островные дуги и проявления плюмовогоunclassified

See 1 more Smart Citation

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Гордиенко

2019

Geodin. tektonofiz.

View full text Add to dashboard Cite

This paper is focused on the relationship between plate-and plume-tectonic processes during the formation of Neoproterozoic and Vendian-Paleozoic island-arc systems and active continental margins in the interaction zone of the Siberian continent and Paleoasian Ocean (PAO). In this study, we use our own materials collected in the long-term research of the Central Asian Orogenic Belt (CAOB) and the published models showing convection in the asthenosphere and mantle, subduction-related and plume magmatism at the Cenozoic active margins of the Western Pacific and California types. It is clearly shown that subduction-related magmatism of the Paleoasian Ocean active margins should not be considered separately from plume magmatism. These interrelated processes played a major role in the CAOB formation. Based on the reconstructed Neoproterozoic, Vendian-Early and Middle Paleozoic paleogeodynamic features, 25 island-arc systems of PAO are characterized. These island arcs are related to the occurrence of more than 30 plume magmatism areas. At the active margin of the Siberian continent, there are numerous fields of intraplate magmatism in riftogeneous structures. Such fields of various scales not related to subduction zones, especially at the final Late Paleozoic stage. All the major stages of the CAOB development, including the Cambrian-Ordovician collision stage, are clearly correlated with plume magmatism. Considering a revealed combination of the island arcs and the plume magmatism areas, there are grounds to suggest that the development of the entire Neoproterozoic-Paleozoic region of Central Asia was related to the activity of mantle plumes.

show abstract

Section: венд-раннепалеозойские островные дуги и проявления плюмовогоunclassified

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Гордиенко

2019

Geodin. tektonofiz.

View full text Add to dashboard Cite

show abstract

“…Об этом свидетельствуют зафиксированные в высокометаморфизованных породах древние взбросо-сдвиговые деформации и выявленные разломы вдоль северо-западного побережья оз. Байкал [Gladkochub et al, 2014]. Следовательно, появляются дополнительные сведения о возникновении геомеханических условий в виде механически ослабленной зоны в литосфере, способствующих в более позднее время проявлению унаследованности в виде заложения Южно-Байкальской впадины и зоны Приморского разлома (рис.…”

Section: а бunclassified

“…2. Коллизионный шов: а -строение одного из глубинных фрагментов коллизионного шва между Сибирским кратоном и Ольхонским террейном, сформировавшегося в неопротерозое -раннем палеозое, по данным [Gladkochub et al, 2014] (район устья р. Бугульдейка); б -положение зоны Приморского рифтогенного сброса, возникшего в зоне коллизионного шва при формировании Южно-Байкальской рифтовой впадины (космоснимок из вышеупомянутой работы).…”

Section: а бunclassified

“…Collision suture: а -structure of a deep fragment of the collision suture between the Siberian craton and Olkhon terrain formed in the Neoproterozoic -Early Paleozoic, according to [Gladkochub et al, 2014] (near the Buguldeika river outlet); б -position of the Primorsky riftogenic normal fault zone that occcurred in the collision suture zone when the South Baikal rift basin was formed (the space image from [Gladkochub et al, 2014]). а б складчатой областью, особенно востребованными для изучения на северо-восточном фланге БРЗ.…”

Section: Figmentioning

confidence: 99%

See 1 more Smart Citation

Estimated Geodynamic Impact From Zones of Collision and Subduction on the Seismotectonic Regime in the Baikal Rift

Ruzhich¹,

Кочарян²,

Левина³

2016

Geodin. tektonofiz.

View full text Add to dashboard Cite

The paper briefly overviews the evolution of ideas concerning causes and mechanisms related to the origin of the Baikal rift zone (BRZ) in the centre of the Eurasian plate, discusses parameters of the recent seismogeodynamic impact on the seismotectonic regime in BRZ due to the Western Pacific subduction and the Indo-Eurasian collision, and attempts at estimating their contributions to the modern geodynamics of rifting processes in Pribaikalie. Seismic migration processes and specific density patterns of the released seismic energy are analyzed for two selected profiles between BRZ and the regions of collision and subduction. A statistical method is proposed to calculate seismic migration from space-time diagrams, and equations are developed to show a decrease in specific density of seismic energy released in the lithosphere at a distance from the interplate boundaries towards the Baikal rift. The modern geodynamic impact on the seismotectonic regime in BRZ due to the Indo-Eurasian collision is reflected in moderate horizontal compression of the lithosphere, mainly in the southwestern BRZ and partly in the central BRZ. In the transition area in this profile, the specific density of released seismic energy is about 1.72×1010 J/km 2. The geodynamic impact on the seismotectonic regime in BRZ from the subduction zone (from the Nankai trough) is shown by a significantly lower specific density of released seismic energy, 1.02×1010 J/km 2. In the lithosphere of the northeastern BRZ, a weaker geodynamic influence is mainly manifested by responses to strong seismic events and earthquake focal mechanisms with a clear strike-slip component in the Chara and Tokka basins located in the Aldan shield of the Siberian platform. We discuss a possible mechanism that drives the propagation of the geodynamic impact on BRZ from the interplate contact areas. In our opinion, the geodynamic influence propagates intermittently in the lithospheric plates due to motions of slow-deformation-wave fronts, which are reflected in the diagrams as seismic activity clusters. The longrange propagation of slow waves is realized through triggering of active faults in the lithosphere. Such faults interacting with slow wave deformations may be manifested as excited sources of dissipation of seismic oscillations resulting from a spontaneous release of the energy accumulated in the Earth interior. This mechanism of endogenous energy supply may explain the observed propagation of recordable slow elastoplastic deformations for many thousands of kilometres. Today, when the new materials are available to show more ancient ages of the early elements of BRZ, and it is established that the tectonic energy is reduced with distance from the interplate boundaries, there is no support for the hypothesis based on the role of the Indo-Eurasian collision in the formation of BRZ. A recordable seismotectonic impact on the seismic regime in BRZ can occasionally occur after a major seismic activity in the regions of collision and subduction. This phenomenon may be used as ...

show abstract

Stable isotope (C, O, H) characteristics and genesis of the Tazheran brucite marbles and skarns, Olkhon region, Russia

et al. 2016

View full text Add to dashboard Cite

Fragment of the Early Paleozoic (∼500 Ma) island arc in the structure of the Olkhon Terrane, Central Asian fold belt

Cited by 24 publications

References 7 publications

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Relationship Between Subduction‐related and Plume Magmatism at the Active Boundaries of Lithospheric Plates in the Interaction Zone of the Siberian Continent and Paleoasian Ocean in the Neoproterozoic and Paleozoic

Estimated Geodynamic Impact From Zones of Collision and Subduction on the Seismotectonic Regime in the Baikal Rift

Stable isotope (C, O, H) characteristics and genesis of the Tazheran brucite marbles and skarns, Olkhon region, Russia

Contact Info

Product

Resources

About