ПОЗДНЕВЕНДСКИЕ КОМПЛЕКСЫ  В СТРУКТУРЕ МЕТАМОРФИЧЕСКОГО ОСНОВАНИЯ  ПЕРЕДОВОГО ХРЕБТА БОЛЬШОГО КАВКАЗА, "Геотектоника"

Камзолкин, В.А.; Латышев, А.В.; Видяпин, Ю. П.; Сомин, М.Л.; Смульская, А. И.; Иванов, С.Д.

doi:10.7868/s0016853x18030037

Cited by 3 publications

(1 citation statement)

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“…Группа цирконов венд-кембрийского возраста, обнаруженная в пробе К15-007 и ранее в составе цирконов из битакских конгломератов, соответствует кадомской фазе магматизма. Наличие проявлений магматизма этого возраста -ключевой критерий для идентификации террейнов, отделившихся от северного перикратонного обрамления Гондваны [36-38, 42, 44, 47, 50] и участвующих в структуре Западно-Европейской плиты [44, 47,48], восточного обрамления Северо-Американской платформы [47] и южного обрамления ВЕП [4,7,24,42]. В связи с этим мы полагаем, что первичным источником докембрийских dZr были мобилизованные в пределах Киммерийского орогена фрагменты коры Пери-Гондванского происхождения.…”

Section: источники докембрийских и палеозойских цирконовunclassified

Age, HF-isotope systemantics of detritial zircons and the source of conglomerates of the mt. Southern Demerdzhy, Mountainous Crimea

et al. 2019

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The U–Pb dating and Hf isotope systematics of detrital zircons from a sandstone interbed in the section of the upper conglomerate sequence of the Mt. South Demerdzhi were carried out. The dominant populations of detrital zircons in the studied sample characterize episodes of magmatic activity within the source of the Upper Jurassic conglomerates. Magmatism was manifested in the Vendian-Cambrian, Carbon-Triassic and Late Jurassic. The åHf values of detrital zircons of these ages indicate the insignificant role of the ancient (Archean–Early Proterozoic) continental crust in the protolith of magmatic chambers. The similarity of the detrital zircons age distribution from the Middle Jurassic and Upper Jurassic conglomerate strata suggests that they are molasses of the Cimmerian orogen. The absence of products of Middle Jurassic magmatism in molasses of the Cimmerian orogen, which we fixed, limits position of the Cimmerian orogen in the southern part of the Scythian plate. It is shown that the primary source of the Precambrian detrital zircons were mobilized within the Cimmerian orogen the crustal fragments of the Peri-Gondwanan origin, rather than the basement complexes of the East European Platform, similar to the complexes of the Ukrainian shield. The reconstruction of the main stages of the accumulation of the coarse-grained strata of the Mountaineous Crimea in the context of the tectonic evolution of the southern margin of Laurasia during the Mesozoic is presented.

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Section: источники докембрийских и палеозойских цирконовunclassified

Age, HF-isotope systemantics of detritial zircons and the source of conglomerates of the mt. Southern Demerdzhy, Mountainous Crimea

et al. 2019

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Peri-Gondwanan Blocks in the Structure of the Southern and Southeastern Framing of the East European Platform

Кузнецов

Romanyuk

2021

Geotecton.

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Three Generations of the Basins of the Early Turkestan Ocean: Ediacaran–Silurian of the Southern and Middle Tien Shan

Biske,

Алексеев

2023

Stratigrafiâ. Geologičeskaâ korrelâciâ

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The results of U–Pb dating of detrital zircon from volcanoterrigenous Ediacaran–Silurian deposits, mainly from grauwacke turbidites, after accretion of which the “Caledonian” basement of the Paleozoic structure was formed in Kyzylkum and in the ridges of the Southwestern Tien Shan, including Northern Fergana, allowed us to clarify the age correlation and show the dynamics of the formation of this complex. It consists of deposits associated with the opening, filling and subsequent convergent development of three generations of oceanic basins, including the emergence and destruction of island arcs. The earliest of these basins was formed at the active volcanic margin of the eastern Rodinia/Gondwana, which included the Karakum-Tajik massif. Sandy turbidites (Besapan, etc.), whose age is not younger than the beginning of the Cambrian, were deposited here on top of siliceous (Taskazgan) Ediacaran sediments. The second generation is represented by Ordovician basins, in which radiolarian flints of the Lower Ordovician form the bathyal part of the sediments, and the main filling is turbidites of the middle Ordovician–Ruddan. The newly opened Silurian oceanic basins and their margins were filled with sediments of the third Caledonian generation, mainly graptolite aleuropelites and turbidites, starting from the end of the Llandovery. Incomplete preservation of the Ediacaran–Silurian sedimentary series is due to their partial absorption (tectonic erosion) during further subduction and collision, mainly already in the Carboniferous.

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ПОЗДНЕВЕНДСКИЕ КОМПЛЕКСЫ В СТРУКТУРЕ МЕТАМОРФИЧЕСКОГО ОСНОВАНИЯ ПЕРЕДОВОГО ХРЕБТА БОЛЬШОГО КАВКАЗА, "Геотектоника"

Cited by 3 publications

References 0 publications

Age, HF-isotope systemantics of detritial zircons and the source of conglomerates of the mt. Southern Demerdzhy, Mountainous Crimea

Age, HF-isotope systemantics of detritial zircons and the source of conglomerates of the mt. Southern Demerdzhy, Mountainous Crimea

Peri-Gondwanan Blocks in the Structure of the Southern and Southeastern Framing of the East European Platform

Three Generations of the Basins of the Early Turkestan Ocean: Ediacaran–Silurian of the Southern and Middle Tien Shan

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