New data on U-Pb dating of basic and ultrabasic metamorphosed intrusions in the north Ny-Friesland Peninsula (West Spitsbergen)
Abstract
Geology of the north Ny-Friesland Peninsula (Spitsbergen Archipelago) are discussed based on data of geological surveys at a scale of 1:100,000. In the paper presented are new data on two metamagmatite complexes: ultrabasite and gabbroid, whose numerous bodies intrude the Early Proterozoic gneiss, quartzite, and amphibolite of the Atomfjella series. The ages of these metamagmatites (1471 ± 13 and 1349 ± 11 Ma, respectively) were first determined by the U-Pb zircon method that indicates endogenous processes of later stages of the old craton thermal activation.
Keywords
About the Authors
A. N. Sirotkin
Stock Venture «Polar Marine Geosurvey Expedition» (Stock Venture «PMGE»)
Russian Federation
Russian Federation
Doctor of Geological and Mineralogical Sciences, Chief Geologist, Spitsbergen exploration party
A. N. Evdokimov
St.-Petersburg Mining University (SPMU)
Russian Federation
Russian Federation
Doctor of Geological and Mineralogical Sciences, Professor
References
1. Gavrilenko B. V., Kamenskiy I. L. Isochronous K-Ar age and Helium isotopes in a hyperbasite dike on the Mossel Peninsula, Ny Friesland (Spitsbergen). Geokhimiya. 1993. No. 4, pp. 584–589 (In Russian).
2. Krasilʼshchikov A. A. Stratigrafiya i paleotektonika dokembriya – rannego paleozoya Shpitsbergena [Stratigraphy and paleotectonics of the Precambrian – Early Paleozoic of Spitsbergen]. Leningrad: Nedra. 1973. 120 p.
3. Sirotkin A. N. Early Proterozoic sedimentary and volcanogenic complexes of Ny Frisland Peninsula (Spitsbergen Archipelago). Paleovulkanologiya, volcanogenic and sedimentary lithogenesis, hydrothermal metamorphism and ore formation of the Precambrian. Petrozavodsk. 2001. Pp. 87–88. (In Russian).
4. Sirotkin A. N., Еvdokimov A. N. Endogennyye rezhimy i evolyutsiya metamorfizma skladchatykh kompleksov fundamenta arkhipelaga Shpitsbergen (na primere poluostrova Nyu Frisland) [Endogenous regimes and evolution of metamorphism of folded complexes of the Spitsbergen Archipelago basement (on the example of the Ny Friesland Peninsula)]. St. Petersburg: VNIIOkeangeologiya. 2011. 270 p.
5. Sirotkin A. N., Nikitin D. V. Features of geodynamic development of the Devonian graben of Spitsbergen. Zapiski Gornogo instituta. 2011. Vol. 194. Pp. 104–111. (In Russian).
6. Tebenʼkov A. M., Dzhi D. G., Yokhanssen U. et al. A History of tectonic development of the base of Spitsbergen (according to geochronological data). Complex researches of the nature of Spitsbergen. Apatity. 2004. Iss. 4. Pp. 90–100. (In Russian).
7. Balashov, Ju. A. 1993: An Early Proterozoic U-Pb zircon age from an Eskolabreen Formation gneiss in southern Ny Friesland, Spitsbergen. In Balashov, Ju. A., Larionov, A. N., Gannibal, L. F., Sirotkin, A. N., Tebenkov, A. M., Ryungenen, G. I., Ohta, Y. (eds.): Polar Research. 12. 2. 147–152.
8. Gayer, R. A. 1969: The geology of the Femmilsjoen region of the north-west of Ny Friesland, Spitsbergen. Norsk Polarinstitutt Skrifter. 145. 45.
9. Gee, D. G. 1992: New evidence of basement in the Svalbard Caledonides: Early Proterozoic zircon ages from Ny Friesland granites. In Gee, D. G., Schouenborg, B., Peucat, J. J, Abakumov, S. A., Krasil’shchikov, A. A., Tebenkov, A. M. (eds.): Norsk Geologisk Tidsskrift. 72. 81–190.
10. Harland, W. B. 1997: The geology of Svalbard. Geological Society, London, Memoirs. 17. 521.
11. Larionov, A. N., Johansson, A., Tebenkov, A. M. & Sirotkin, A. N. 1995: U-Pb ages from the Eskolabreen Formation, southern Ny Friesland, Svalbard. Norsk Geologisk Tidsskrif. 75. 247–257.
12. McDonough, W. F., Sun, S.-S. 1995: The composition of the Earth. Chemical Geology. 120. 223–253.
13. Soviet geological research in Svalbard 1962–1992. 1996: Extended abstracts of unpublished reports. Meddelelser NR 139. Oslo. 103.
14. Tebenkov, A. M., Ohta, Y., Balashov, Ju. A., Sirotkin, A. N. 1996: Newtontoppen granitoid rocks, their geology, chemistry and Rb-Sr age. Polar Research. 15. 1. 67–80.
15. Williams, I. S. 1998: U-Th-Pb geochronology by ion microprobe. In McKibbe, M. A., Shanks, W. C., Ridley, W. I. (eds.): Reviews in Economic Geology. 7. 1–35.
16. Witt-Nilsson, P. 1998: The West Ny Friesland Terrane: an exhumed mid-crustal obliquely convergent orogen. Doctoral Thesis, Uppsala Universit. 28.
17. Whitney, D. L., Evans, B. W. 2010: Abbreviations for names of rock-forming minerals. American Mineralogist. 95. 185–187.
Review
For citations:
Sirotkin A.N., Evdokimov A.N. New data on U-Pb dating of basic and ultrabasic metamorphosed intrusions in the north Ny-Friesland Peninsula (West Spitsbergen). Regional Geology and Metallogeny. 2020;(81):45–59. (In Russ.)
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