Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Igor M. Gorokhov"'
Autor:
I. M. Vasilieva, A. Yu. Kramchaninov, G. V. Konstantinova, A. B. Kuznetsov, N. G. Rizvanova, Igor M. Gorokhov
Publikováno v:
Doklady Earth Sciences. 500:715-719
The first direct Pb–Pb dating of carbonate rocks of the Kamo Group has been carried out. The Pb–Pb age of carbonates of the lower units (the Madra, Jurubchen, Kuyumba, and Vingold formations) of this sedimentary sequence is 1510 ± 50 Ma, while t
Publikováno v:
Petrology. 29:175-194
Comprehensive petrological and isotope-geochemical study of marble was carried out in the upper part of the Sortavala Group of the northeastern lense at the Ruskeala deposit in the Northern Ladoga area. The petrological study showed that the carbonat
Autor:
Igor M. Gorokhov, P. Ya. Azimov, A. B. Kuznetsov, N. G. Rizvanova, I. M. Vasilieva, E. O. Dubinina
Publikováno v:
Stratigraphy and Geological Correlation. 29:121-139
The first Sr isotope data and the new C isotope signatures have been obtained for the metacarbonate rocks of the Sortavala Group in the Fennoscandian Shield. The metacarbonate rocks of the lower carbonate horizon of this group represent the sediments
Autor:
A. B. Kuznetsov, G. V. Konstantinova, T. A. Ivanovskaya, V. M. Gorozhanin, T. S. Zaitseva, Igor M. Gorokhov
Publikováno v:
Stratigraphy and Geological Correlation. 27:573-587
This work presents the results of the mineralogical, crystallochemical, and geochronological study of globular phyllosilicates (GPS) of glauconite–illite series from the Bakeevo Formation. This formation is the basal member of the Vendian Asha Grou
Autor:
Igor M. Gorokhov, G. V. Lipenkov, I. M. Vasil’eva, M. A. Semikhatov, E. O. Dubinina, A. B. Kuznetsov, N. G. Rizvanova
Publikováno v:
Stratigraphy and Geological Correlation. 27:514-528
The U and Pb contents and C, O, and Pb isotopic compositions are determined for dolomites of the Billyakh Group (6 and 15 samples of the Kotuikan and Yusmastakh formations, respectively), which composes the upper part of the Riphean section of the An
Autor:
T. L. Turchenko, V. P. Kovach, Igor M. Gorokhov, T. S. Zaitseva, I. M. Vasil’eva, G. V. Ovchinnikova, G. V. Konstantinova, M. M. Arakelyants, A. B. Kuznetsov
Publikováno v:
Стратиграфия. 27:3-30
The 2–5, 0.6–2, 0.3–0.6, 0.2–0.3 and 0.1–0.2 µm clay subfractions (SFs) separated from two shale samples of the Upper Riphean Inzer Formation, the southern Urals, were studied by the TEM, XRD, and U–Pb, Sm–Nd, Rb–Sr and K–Ar isotop
Autor:
A. B. Kuznetsov, G. V. Konstantinova, M. M. Arakelyants, I. M. Vasil’eva, T. S. Zaitseva, V. P. Kovach, Igor M. Gorokhov, G. V. Ovchinnikova, T. L. Turchenko
Publikováno v:
Stratigraphy and Geological Correlation. 27:133-158
Clay subfractions (SFs) with particles size of 2–5, 0.6–2.0, 0.3–0.6, 0.2–0.3, and 0.1–0.2 μm of two shale samples (Upper Riphean Inzer Formation, South Urals) are studied using transmission electron microscopy, X-ray diffractometry (XRD),
Autor:
T. S. Zaitseva, A. B. Kuznetsov, M. A. Semikhatov, T. A. Ivanovskaya, G. V. Konstantinova, Igor M. Gorokhov, O. V. Dorzhieva
Publikováno v:
Stratigraphy and Geological Correlation. 26:611-633
The complex mineralogical–geochemical and isotope–geochronological study of globular phyllosilicates (GPS) of glauconite–illite series from Upper Proterozoic deposits of the Olenek Uplift (North Siberia) was performed. The Rb–Sr and K–Ar da
Autor:
G. V. Lipenkov, A. B. Kuznetsov, G. V. Konstantinova, Igor M. Gorokhov, I. V. Bigun, E. O. Dubinina
Publikováno v:
Doklady Earth Sciences. 482:1306-1310
New 87Sr/86Sr, δ13C, and δ18О chemostratigraphic data were obtained for carbonate rocks of the Lower Riphean Yusmastakh and the Vendian Starorechenskaya formations. The δ13С values in dolomites of the Yusmastakh Formation varies from–0.6 to–
Publikováno v:
Stratigraphy and Geological Correlation. 26:367-386
The methodical basis, development, and current state of a new method of chronostratigraphic studies, i.e., strontium isotope stratigraphy (SIS), are considered. This method makes it possible to date and correlate geographically distant sedimentary se