The Vendian passive continental margin in the southern Siberian Craton: geochemical and isotopic (Sr, Sm–Nd) evidence and U–Pb dating of detrital zircons by the LA-ICP-MS method

2013 ◽  
Vol 54 (10) ◽  
pp. 1177-1194 ◽  
Author(s):  
E.F. Letnikova ◽  
A.B. Kuznetsov ◽  
I.A. Vishnevskaya ◽  
S.V. Veshcheva ◽  
A.I. Proshenkin ◽  
...  
Keyword(s):  
Continental Margin ◽  
Siberian Craton ◽  
Detrital Zircons ◽  
Passive Continental Margin ◽  
Icp Ms

scholarly journals Supplemental Material: Rifting of the Indian passive continental margin: Insights from the Langjiexue basalts in the central Tethyan Himalaya, southern Tibet

2022 ◽  
Author(s):  
Chao Wang ◽  
et al.
Keyword(s):  
Trace Element ◽  
Continental Margin ◽  
Analytical Methods ◽  
Passive Continental Margin ◽  
Southern Tibet ◽  
Nd Isotope ◽  
Icp Ms ◽  
Element Variation ◽  
Tethyan Himalaya

Text S1: Analytical methods. Figure S1: Zr versus selected element variation diagrams to highlight the effects of alteration and metamorphism for the basalts from Langjiexue area. Figure S2: (A) Ti/Y vs. TiO2, and (B) Ti/Y vs. MgO diagrams for the basalt samples from the Langjiexue in Tethyan Himalaya. Table S1: Representative Permian-Triassic magmatic events along the Tethyan Himalaya. Table S2: Zircon LA-ICP-MS U-Pb in-situ analyzing results for zircons from the Langjiexue basalts. Table S3: Whole-rock major, trace element and Sr-Nd isotope data of Langjiexue basalts.

scholarly journals The first results of U-Pb datings of detrital zircons from the basal deposits of the Upper Precambrian of the Subpolar Urals

2019 ◽  
Vol 488 (2) ◽  
pp. 172-175
Author(s):  
А. M. Pystin ◽  
Yu. I. Pystina ◽  
V. B. Hubanov
Keyword(s):  
Continental Margin ◽  
Ural Region ◽  
Detrital Zircons ◽  
Subpolar Urals ◽  
The North ◽  
Lower Riphean ◽  
Icp Ms ◽  
First Results ◽  
Age Limit ◽  
The Baltic

In the north of the Timan-Ural region, in contrast to its southern regions, there are no Lower Riphean deposits. The question of the presence of Middle Riphean stratons here remains open, since their age is accepted conditionally. In the Subpolar Urals, the Puiva Formation, which lies at the base of the Upper Precambrian section of this region, belongs to the Middle Riphean. The first U-Pb results of the LA-SF-ICP-MS dating of detrital zircons from terrigenous deposits of the Puiva Formation give reason to limit the lower age interval of their formation abroad about 900 million years ago. The obtained dating of the detrital zircons of their obviously basal terrigenous sediments for the Timan-Northern Ural Upper Precambrian, taking into account already available data on the age of the Upper Precambrian strata of this region, indicate that the lower age limit of the Timan continental margin of the Baltic is close to the boundary of the Middle and Late Riphean.

scholarly journals Supplemental Material: Rifting of the Indian passive continental margin: Insights from the Langjiexue basalts in the central Tethyan Himalaya, southern Tibet

2022 ◽  
Author(s):  
Chao Wang ◽  
et al.
Keyword(s):  
Trace Element ◽  
Continental Margin ◽  
Analytical Methods ◽  
Passive Continental Margin ◽  
Southern Tibet ◽  
Nd Isotope ◽  
Icp Ms ◽  
Element Variation ◽  
Tethyan Himalaya

Text S1: Analytical methods. Figure S1: Zr versus selected element variation diagrams to highlight the effects of alteration and metamorphism for the basalts from Langjiexue area. Figure S2: (A) Ti/Y vs. TiO2, and (B) Ti/Y vs. MgO diagrams for the basalt samples from the Langjiexue in Tethyan Himalaya. Table S1: Representative Permian-Triassic magmatic events along the Tethyan Himalaya. Table S2: Zircon LA-ICP-MS U-Pb in-situ analyzing results for zircons from the Langjiexue basalts. Table S3: Whole-rock major, trace element and Sr-Nd isotope data of Langjiexue basalts.

U–Pb ages for magmatism and deformation in the New Quebec Orogen

1997 ◽  
Vol 34 (5) ◽  
pp. 716-723 ◽  
Author(s):  
N. Machado ◽  
T. Clark ◽  
J. David ◽  
N. Goulet
Keyword(s):  
Lower Limit ◽  
Continental Margin ◽  
Detrital Zircons ◽  
Passive Continental Margin ◽  
Source Rocks ◽  
Sedimentary Sequences ◽  
Deformational History ◽  
Fold And Thrust Belt ◽  
History Of ◽  
Magmatic Event

The New Quebec Orogen is a Paleoproterozoic fold and thrust belt, active from 2.17 to 1.77 Ga, bordering the eastern margin of the Archean Superior Province. The orogen developed on a long-lived, passive continental margin and comprises two volcanic – sedimentary sequences. The ages presented in this study help to bracket the magmatic and deformational history of the orogen. A glomeroporphyritic gabbro from the Hellancourt Formation was dated at 1874 ± 3 Ma and a rhyodacite from the upper Murdoch Formation yielded an identical age of 1870 ± 4 Ma. These data allow the correlation of the two units and indicate that they are 10–14 Ma younger than the estimated age for the Sokoman Formation. These ages, together with already published work, indicate that magmatism related to the younger magmatic event occurred at 1884–1870 Ma. Albitized pelites from the Murdoch Formation contain euhedral detrital zircons 2707–2690 Ma old, indicating that the source rocks were Archean. An undeformed monzonitic intrusion occurring close to Nachicapau Lake is 1813 ± 4 Ma old and is the lower limit for the age of deformation in the central sector of the orogen.

Precambrian to Early Cretaceous rocks of the Strandja Massif (northwestern Turkey): evolution of a long lasting magmatic arc

2016 ◽  
Vol 53 (11) ◽  
pp. 1312-1335 ◽  
Author(s):  
Boris A. Natal’in ◽  
Gürsel Sunal ◽  
Erkan Gün ◽  
Bo Wang ◽  
Yang Zhiqing
Keyword(s):  
Early Cretaceous ◽  
Continental Margin ◽  
Detrital Zircons ◽  
Passive Continental Margin ◽  
Magmatic Arc ◽  
The North ◽  
Long Duration ◽  
Northwestern Turkey ◽  
Northern Side ◽  
Devonian Age

The Strandja Massif, northwestern Turkey, forms a link between the Balkan Zone of Bulgaria, which is correlated with the Variscan orogen in Europe, and the Pontides, where Cimmerian structures are prominent. Five fault-bounded tectonic units form the massif structure. (1) The Kırklareli Unit consists of the Paleozoic basement intruded by the Carboniferous to Triassic Kırklareli metagranites. It is unconformably overlain by Permian and Triassic metasediments. (2) The Vize Unit that is made of Neoproterozoic metasediments, which are intruded by Cambrian metagranites, and overlain by the pre-Ordovician molasse. Unconformably laying the Ordovician quartzites pass upward into quartz schists and then to alternating marble and chert of, possibly, latest Devonian age. Rocks of the Vize Unit are intruded by the late Carboniferous metagranites. The Vize Unit may be correlated with the passive continental margin of the Istanbul Zone. (3) The Mahya accretionary complex and (4) the paired Yavuzdere magmatic arc were formed in the Carboniferous. (5) Nappes consisting of the Jurassic dolomites and marbles thrust to the north in late Jurassic – early Cretaceous time. They occupy the highest structural position on all above-mentioned tectonic units. Tectonic subdivision of the Strandja Massif is supported by new 18 ages of magmatic and detrital zircons. The long duration of subduction-related magmatism in the region and its continuity in the Triassic contradicts with the widely accepted ideas about the dominance of the passive continental margin settings in the tectonic evolution of the Strandja Massif. The massif is interpreted as a fragment of the long-lived, Cambrian to Triassic Silk Road magmatic arc. At least since the late Paleozoic this arc evolved on the northern side of Paleo-Tethys.

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