The first find of kimberlitic accessory minerals in mafic-ultramafic dikes in Spitsbergen

Евдокимов, А. Н.; Burnaeva, M. Yu.; Radina, E. S.; Sirotkin, A. N.

doi:10.1134/s1028334x06020280

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Another argument corroborating these data is the involvement in folding of Carboniferous picritic dykes dated at ca. 357 Ma (Evdokimov et al, 2006;monchiquite dykes in Gayer et al, 1966 andLyberis, 1996) intruding Lower Devonian sedimentary rocks at Krosspynten (see location in Figure 1).…”

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confidence: 97%

The timing of the Ellesmerian Orogeny in Svalbard: A review

Koehl

Marshall

Lopes

2022

Preprint

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Abstract. In the Late Devonian–earliest Mississippian, Svalbard was affected by a short-lived episode of deformation named the Ellesmerian (Svalbardian) Orogeny. This event resulted in intense folding and thrusting in Devonian sedimentary successions. Deformation stopped prior to the deposition of Carboniferous–Permian sedimentary strata of the Billefjorden and Gipsdalen groups, which lie unconformably over folded Devonian strata. Later on, presumed Ellesmerian structures were reworked during Eurekan tectonism in the early Cenozoic and partly eroded. At present, record of Ellesmerian deformation is only preserved in narrow N–S-trending belts in central–northern, western and southern Spitsbergen. Despite extensive field studies, the timing of the Ellesmerian Orogeny is poorly constrained, and remains a matter of debate in places because of conflicting ages and because of the complex tectonic history of Svalbard. The present contribution aims at reviewing and discussing all available age constraints for Ellesmerian tectonism in Svalbard, which has great implications for the plate tectonic reconstructions of Arctic regions and for the tectonic history of Svalbard.

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confidence: 97%

The timing of the Ellesmerian Orogeny in Svalbard: A review

Koehl

Marshall

Lopes

2022

Preprint

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Structural setting and geochemistry of Devonian dikes in the Kola Peninsula

2012

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Lamprophyres of the Southern Coast of Novaya Zemlya: Composition, Tectonomagmatic Position, and New Age Data

Korago

Stolbov

Burnaeva

et al. 2023

Russian Geology and Geophysics

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—The Novaya Zemlya Archipelago is an early Cimmerian folded structure located on the northern periphery of the Ural–Mongolian fold belt. The geologic development of the archipelago is well-studied and serves as a benchmark for interpolating its features to the shelf of the surrounding water areas, whose sedimentary cover contains large accumulations of hydrocarbon raw materials. In addition to the stratified section of essentially sedimentary rocks, it is of interest to study igneous formations, which clearly mark tectonic events in the geologic history of the archipelago. In the light of this, the age of these formations remains important. The age of some magmatic complexes of the archipelago is still debatable. This paper focuses upon a lamprophyre complex in the extreme south of Novaya Zemlya, which has been dated at the Late Proterozoic or Late Proterozoic–early Paleozoic(?) until recently. The results obtained for the U–Pb age of apatites contained in the rocks of this complex confirm the Devonian age of the lamprophyres, and it is suggested by estimates based on the presented data that the emplacement time lies in a range from 360 to 398 Ma. This means that they might be associated with riftogenic processes on Novaya Zemlya since the second half of the Early Devonian, when the stage of short-term stable carbonate sedimentation (in the first half of the Devonian Period) was replaced by the initiation of a new structural–formational zonal sequence.

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The first find of kimberlitic accessory minerals in mafic-ultramafic dikes in Spitsbergen

Cited by 5 publications

References 4 publications

The timing of the Ellesmerian Orogeny in Svalbard: A review

The timing of the Ellesmerian Orogeny in Svalbard: A review

Structural setting and geochemistry of Devonian dikes in the Kola Peninsula

Lamprophyres of the Southern Coast of Novaya Zemlya: Composition, Tectonomagmatic Position, and New Age Data

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