Geodynamic formation settings of Ordovician and Devonian dike complexes in ophiolitic sections of the Southern Urals and Mugodzhary

Ryazantsev, A. V.; Белова, Анна; Razumovsky, A. A.; Кузнецов, Н. Б.

doi:10.1134/s0016852112020045

Cited by 14 publications

(2 citation statements)

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“…It has been reliably established that certain statistical trends and appreciable differences in the trace-elements contents are recorded for zircons from certain types of rocks [14,15,[21][22][23][24][25][26]. Thus, in general, REE contents in zircons increase from the basic rocks (gabbroids and basaltoids), where the total content of REE are (5)(6)(7)(8)(9)(10)x100ppm up to (1-2)x1000ppm, to felsic rocks (granitoids and their effusive analogs), where the total content of REE are (2)(3)(4)(5) x1000ppm and more, and in zircons from pegmatites can reach (1-3)x10000 of ppm (1-3%). For such rocks as kimberlites, the typical total content of REE in zircons is usually less than 50ppm.…”

Section: Analysis Of the Trace-elements Contents In Zirconsmentioning

confidence: 99%

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Geochemical and Lu-Hf Isotope Systematic of Detrital Zircons from the Ordovician Sandstones of the Sol-Iletsk Arch (Russia, Northern Caspian, Borehole Ordovician-2)

Belousova

Romanyuk

2018

AAOA

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The Sol-Iletsk arch is located at the south eastern edge of the East European platform (EEP), where EEP adjoins with the Southern Urals. The results of the integrated (U-Pb age, Lu-Hf isotopic system and trace-elements) study of detrital zircons (dZr) from the Ordovician sandstones (within Sol-Iletsk arch) reached by borehole Ordovician-2 are presented. The primary sources of Early Precambrian dZr were most likely the crystalline complexes of the Late Proterozoic Volgo-Sarmatian and Taratash orogens and Archean Volga-Uralia basement. However, for numerous dZr with ages younger 1.65Ga, it is not possible presently to unambiguously identify primary sources. Crystalline complexes with such ages are absolutely atypical for the south-eastern part of the EEP, but they occurred within parts EEP very remote from Sol-Iletsk arch and beyond EEP.

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Section: Analysis Of the Trace-elements Contents In Zirconsmentioning

confidence: 99%

“…The Ordovician is the time of maximal opening of the paleoceanic basins, the relicts of which are represented in the present-day structure of the Southern Urals [1][2][3][4]. It is assumed that the accumulations of Ordovician sequences of Sol-Iletsk arch were formed in grabens during the opening of the Paleo-Uralian ocean [5,6].…”

Section: Introductionmentioning

confidence: 99%