TY - JOUR

T1 - Late Palaeozoic magmatism of Northern Taimyr: new insights into the tectonic evolution of the Russian High Arctic

AU - Kurapov, Mikhail

AU - Ershova, Victoria

AU - Khudoley, Andrei

AU - Luchitskaya, Marina

AU - Makariev, Alexander

AU - Makarieva, Elena

AU - Vishnevskaya, Irina

N1 - Funding Information: This work was supported by RFBR [Grant 19-35-90006]. Interpretation of isotopic data was supported by the Russian Science Foundation [grant ? 20-17-00169]. Study of A. Khudoley (tectonic interpretation) was supported by the Ministry of Science and High Education of the Russian Federation [grant 075-15-2019-1883]. Fieldwork and geochronological dating were performed in the framework of compiling the State Geological Map of Russian Federation on a scale of 1: 1000000. We are grateful to Dr. J. Barnet for discussion and correcting the English. We thank Dr. Robert Stern, Prof. Victoria Pease and anonymous reviewer?for their constructive comments, which helped us to?improve?the?manuscript. Publisher Copyright: © 2020 Informa UK Limited, trading as Taylor & Francis Group.

PY - 2021

Y1 - 2021

N2 - We report new results of a comprehensive study into Carboniferous–Early Permian granite magmatism of the northern Taimyr Peninsula, Russia (southern part of the Kara Terrane). U-Pb zircon ages (SHRIMP and LA–ICP–MS) represent the crystallization ages of these intrusions and range from ca. 344.5 to 288.4 Ma, defining the onset of granite magmatism during the Early Carboniferous (Visean; ca. 344 Ma) and its termination in the Early Permian (Artinskian; ca. 288 Ma). Ar-Ar dating of micas and amphiboles indicates that Late Palaeozoic tectonic activity in northern Taimyr ceased during the Middle Permian (Roadian; ca. 272 Ma). Rb/Sr and Sm/Nd isotopic data from the same intrusions, show initial (87Sr/86Sr)i ratios of between 0.70288 and 0.71027, with εNd(t) values range between −3.3 and +3.1. The combined geochemical and isotopic compositions of the granites describe an affinity to peraluminous I-type granites, probably formed in an Andean-type active continental margin setting. Our new geochemical, isotopic, and geochronological data indicate the existence of a long-lived (ca. 56 Myr) Andean-type active continental margin along the southern edge of the Kara Terrane during the Late Palaeozoic. Furthermore, our study reveals a causal relationship between Late Palaeozoic magmatism across northern Taimyr and closure of the Uralian Ocean.

AB - We report new results of a comprehensive study into Carboniferous–Early Permian granite magmatism of the northern Taimyr Peninsula, Russia (southern part of the Kara Terrane). U-Pb zircon ages (SHRIMP and LA–ICP–MS) represent the crystallization ages of these intrusions and range from ca. 344.5 to 288.4 Ma, defining the onset of granite magmatism during the Early Carboniferous (Visean; ca. 344 Ma) and its termination in the Early Permian (Artinskian; ca. 288 Ma). Ar-Ar dating of micas and amphiboles indicates that Late Palaeozoic tectonic activity in northern Taimyr ceased during the Middle Permian (Roadian; ca. 272 Ma). Rb/Sr and Sm/Nd isotopic data from the same intrusions, show initial (87Sr/86Sr)i ratios of between 0.70288 and 0.71027, with εNd(t) values range between −3.3 and +3.1. The combined geochemical and isotopic compositions of the granites describe an affinity to peraluminous I-type granites, probably formed in an Andean-type active continental margin setting. Our new geochemical, isotopic, and geochronological data indicate the existence of a long-lived (ca. 56 Myr) Andean-type active continental margin along the southern edge of the Kara Terrane during the Late Palaeozoic. Furthermore, our study reveals a causal relationship between Late Palaeozoic magmatism across northern Taimyr and closure of the Uralian Ocean.

KW - active margin

KW - granites

KW - I-type granite

KW - Kara Terrane

KW - Northern Taimyr

KW - SEVERNAYA-ZEMLYA-ARCHIPELAGO

KW - DETRITAL ZIRCON AGES

KW - U-PB

KW - DEFORMATION

KW - TRACE-ELEMENT

KW - BELT

KW - DISCRIMINATION

KW - ND

KW - GRANITES

KW - SR

UR - http://www.scopus.com/inward/record.url?scp=85091304470&partnerID=8YFLogxK

U2 - 10.1080/00206814.2020.1818300

DO - 10.1080/00206814.2020.1818300

M3 - Article

AN - SCOPUS:85091304470

VL - 63

SP - 1990

EP - 2012

JO - International Geology Review

JF - International Geology Review

SN - 0020-6814

IS - 16

ER -