Age of rocks of the Shurmak Formation according to U-Pb dating of zircon by LA-ICP-MS method (south-eastern Tuva)

At the south-eastern part of Tuva, early Proterozoic volcanogenic-sedimentary deposits have been studied including conglomerates from Shurmak formation. As the result of U-Pb zircon dating from tuff with andesitic composition, conglomerate matrix and volcanicomictic sandstones from this formation, it has been established that it was accumulated at around 500 Ma. The dating results for zircons from tuff are a geochronological date and indicate the time of manifestation of andesitic volcanism synchronous with accumulation of Shurmak Formation deposits. Given the close age of zircons of the main populations in both tuff and clastic rocks, one can assume that the formation of the latter is related directly to the manifestations of volcanism on this territory at this time. The presence in the tuff of xenogenic zircons and in volcanicomictic sandstones and matrix of Shurmak Formation of detrital zircons with Neoproterozoic and Paleoproterozoic age, as well as Sm-Nd isotopic data indicate that these volcanic and sedimentary processes in the early Cambrian time took place within the range if Precambrian block of earth’s crust. The main supplier of clastic material during the formation of the Early Cambrian Shurmak Formation were volcanic events synchronous with sedimentation. Other sources of clastic material entering the sedimentation basin were Neoproterozoic granitoids and, less commonly, Paleoproterozoic and Neoarchean rocks. Combination with the underlying rocks of the Mugur Formation of the Erza metamorphic complex occurred as a result of tectonic processes in the post-Cambrian time, since the sedimentation of the Shurmak Formation deposits and the processes of granulite metamorphism in the rocks of the metamorphic complex occurred almost simultaneously.

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The Sources of the Clastic Material of the Terrigenous Sequences of the Neoarchean and Paleoproterozoic Paleobasins in the Eastern Part of the Fennoscandian Shield Based on Isotope Analysis Data for Detrital Zircons (SIMS, LA-ICP-MS)

Stratigraphy and Geological Correlation ◽

10.1134/s086959382006009x ◽

2020 ◽

Vol 28 (6) ◽

pp. 571-602

Author(s):

V. F. Smolkin ◽

S. V. Mezhelovskaya ◽

A. D. Mezhelovsky

Keyword(s):

Isotope Analysis ◽

Analysis Data ◽

Fennoscandian Shield ◽

Detrital Zircons ◽

Clastic Material ◽

Icp Ms

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Results of U–Pb LA–ICP–MS dating of detrital zircons from Ediacaran–Early Cambrian deposits of the eastern part of the Baltic monoclise

Doklady Earth Sciences ◽

10.1134/s1028334x16060064 ◽

2016 ◽

Vol 468 (2) ◽

pp. 593-597 ◽

Cited By ~ 9

Author(s):

A. S. Ivleva ◽

V. N. Podkovyrov ◽

V. B. Ershova ◽

O. A. Anfinson ◽

A. K. Khudoley ◽

...

Keyword(s):

Detrital Zircons ◽

Early Cambrian ◽

Icp Ms ◽

The Baltic

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U–Pb (LA–ICP-MS) dating of detrital zircons from Cambrian clastic rocks in Avalonia: erosion of a Neoproterozoic arc along the northern Gondwanan margin

Journal of the Geological Society ◽

10.1144/0016-764903-064 ◽

2004 ◽

Vol 161 (2) ◽

pp. 243-254 ◽

Cited By ~ 64

Author(s):

J.Brendan Murphy ◽

Javier FernÁndez-SuÁrez ◽

TeresaE. Jeffries ◽

RobinA. Strachan

Keyword(s):

Detrital Zircons ◽

Clastic Rocks ◽

Icp Ms

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Precambrian Basement and Late Paleoproterozoic to Mesoproterozoic Tectonic Evolution of the SW Yangtze Block, South China: Constraints from Zircon U–Pb Dating and Hf Isotopes

Minerals ◽

10.3390/min8080333 ◽

2018 ◽

Vol 8 (8) ◽

pp. 333 ◽

Cited By ~ 5

Author(s):

Wei Liu ◽

Xiaoyong Yang ◽

Shengyuan Shu ◽

Lei Liu ◽

Sihua Yuan

Keyword(s):

South China ◽

Tectonic Evolution ◽

Detrital Zircons ◽

Geochemical Data ◽

Precambrian Basement ◽

Yangtze Block ◽

Two Stage ◽

Clastic Rocks ◽

Columbia Supercontinent ◽

Isotopic Analyses

Zircon U–Pb dating and Hf isotopic analyses are performed on clastic rocks, sedimentary tuff of the Dongchuan Group (DCG), and a diabase, which is an intrusive body from the base of DCG in the SW Yangtze Block. The results provide new constraints on the Precambrian basement and the Late Paleoproterozoic to Mesoproterozoic tectonic evolution of the SW Yangtze Block, South China. DCG has been divided into four formations from the bottom to the top: Yinmin, Luoxue, Heishan, and Qinglongshan. The Yinmin Formation, which represents the oldest rock unit of DCG, was intruded by a diabase dyke. The oldest zircon age of the clastic rocks from the Yinmin Formation is 3654 Ma, with εHf(t) of −3.1 and a two-stage modeled age of 4081 Ma. Another zircon exhibits an age of 2406 Ma, with εHf(t) of −20.1 and a two-stage modeled age of 4152 Ma. These data provide indirect evidence for the residues of the Hadean crustal nuclei in the Yangtze Block. In combination with the published data, the ages of detrital zircons from the Yinmin Formation yielded three peak ages: 1.84, 2.30 and 2.71 Ga. The peaks of 1.84 and 2.71 Ga are global in distribution, and they are best correlated to the collisional accretion of cratons in North America. Moreover, the peak of 1.84 Ga coincides with the convergence of the global Columbia supercontinent. The youngest age of the detrital zircon from the Yinmin Formation was 1710 Ma; the age of the intrusive diabase was 1689 ± 34 Ma, whereas the weighted average age of the sedimentary tuff from the Heishan Formation was 1414 ± 25 Ma. It was presumed that the depositional age for DCG was 1.71–1.41 Ga, which was in accordance with the timing of the breakup of the Columbia supercontinent. At ~1.7 Ga, the geochemical data of the diabase were characterized by E-MORB and the region developed the same period A-type granites. Thus, 1.7 Ga should represent the time of the initial breakup of the Yangtze Block. Furthermore, the Yangtze Block continues to stretch and breakup until ~1.4 Ga, which is characterized by the emergence of oceanic island, deep-sea siliceous rock and flysch, representing the final breakup. In brief, the tectonic evolution of the Yangtze Block during the Late Paleoproterozoic to Mesoproterozoic coincided with the events caused by the convergence and breakup of the Columbia supercontinent, because of which, the Yangtze Block experienced extensive magmatic activity and sedimentary basin development during this period.

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LA-ICP-MS U–Pb geochronology of detrital zircons from the Zhaochigou Formation-complex in the Helan Mountain and its tectonic significance

Chinese Science Bulletin ◽

10.1007/s11434-014-0180-2 ◽

2014 ◽

Vol 59 (13) ◽

pp. 1425-1437 ◽

Cited By ~ 3

Author(s):

Liming Li ◽

Zuoxun Zeng ◽

Yanjun Lu ◽

Yunxu Wei ◽

Shimin Xiang ◽

...

Keyword(s):

Detrital Zircons ◽

Icp Ms ◽

Tectonic Significance ◽

Helan Mountain

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Geochemical features, sources and geodynamic settings of accumulation of the cambrian sedimentary rocks of the Mel’gin trough (Bureya continental massif)

Геохимия ◽

10.31857/s0016-7525645503-519 ◽

2019 ◽

Vol 64 (5) ◽

pp. 503-519

Author(s):

R. O. Ovchinnikov ◽

A. A. Sorokin ◽

V. P. Kovach ◽

A. B. Kotov

Keyword(s):

Continental Margin ◽

Active Continental Margin ◽

Sedimentary Rocks ◽

Detrital Zircons ◽

Igneous Rocks ◽

Early Cambrian ◽

Relative Probability ◽

Early Proterozoic ◽

Geodynamic Settings ◽

Probability Plots

The first data about geochemical features of the Cambrian sedimentary rocks of the Mel’gin trough of the Bureya continental Massif, as well as ages of detrital zircons of them are obtained. It is established, that among the detrital zircons from the sandstones of the Chergilen and Allin formations of the Mel’gin trough zircons with Late Riphean (peaks on relative probability plots – 0.78, 0.82, 0.94, 1.04 Ga) and Early Riphean (peaks on relative probability plots – 1.38, 1.45, 1.64 Ga) ages predominate. The single grains have a Middle Riphean, Early Proterozoic and Late Archean ages. We can suppose, that the sources of Late Riphean detrital zircons from sandstones of the Chergilen and Allin formations are igneous rocks of gabbro-granitoids (940–933 Ma) and granite- leucogranites (804–789 Ma) association, identified in the Bureya continental Massif. We can`t assume, what kind of rocks were the source for Middle Riphean and older detrital zircons from the Cambrian sedimentary rocks of the Bureya continental Massif, because in this massif still do not identified complexes older Late Riphean age. The most probable geodynamic conditions of accumulation of the Cambrian deposits of the Mel’gin trough is the conditions of active continental margin, which is corresponding to of Early Cambrian granitoids magmatism.

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The sources of zircons in clastic rocks of the Riphean deposits of the Urals

Доклады Академии наук ◽

10.31857/s0869-56524884413-419 ◽

2019 ◽

Vol 488 (4) ◽

pp. 413-419

Author(s):

A. A. Krasnobaev ◽

V. N. Puchkov ◽

N. D. Sergeeva ◽

S. V. Busharina

Keyword(s):

Southern Urals ◽

Detrital Zircons ◽

The Other ◽

The Urals ◽

The Southern Urals ◽

Clastic Rocks ◽

Lower Riphean ◽

Age Variations ◽

Age Determinations

New age determinations of detrital zircons of sandstones augmented the possibilities of interpretation of their provenance. This interpretation is often restricted by a formal comparison of age-and-composition characteristics of detrital crystals with any very distant model objects. A different situation arises when the role of a source of a detritus is claimed by local objects. The analysis of SHRIMP and TIMS - datеs of zircons and U and Th concentrations in them, and also a comparison of histograms of primary zircons from Riphean volcanics and rocks of the Taratash complex on one hand and the detrital zircons from the sandstones of Vendian (Asha series) and Lower Riphean (Ai Formation) on the other, have shown that the age variations of sources and clastics are comparable in many aspects. It means that the age characteristics of primary zircons from the Riphean volcanics and rocks of the Taratash complex as sources of zircon clastics for the Riphean and Vendian sandstones in the Southern Urals are regulated by processes of resedimentation, though the influence of distant sources is not excluded.

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Supplemental Material: Detrital zircons from Late Paleozoic Ice Age sequences in Victoria Land (Antarctica): New constraints on the glaciation of southern Gondwana

10.1130/gsab.s.14251163.v1 ◽

2021 ◽

Author(s):

Luca Zurli ◽

Gianluca Cornamusini

Keyword(s):

Inductively Coupled Plasma ◽

Detrital Zircons ◽

Ice Age ◽

Late Paleozoic ◽

Inductively Coupled ◽

Victoria Land ◽

Icp Ms ◽

Late Paleozoic Ice Age ◽

Plasma Mass Spectrometry ◽

Shape Characterization

Raw laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) analysis and detrital zircon grain shape characterization of the late Paleozoic diamictite samples from Victoria Land, Antarctica.

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