On the age of white anorthosite of the Novomirgorod massif of the Korsun-Novomirgorod pluton (the Ukrainian Shield)

Автор(и)

  • E. E. Shestopalova Institute of Geophysics of the National Academy of Sciences of Ukraine, Україна
  • L.M. Stepanyuk Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Україна
  • T. I. Dovbush Institute of Geochemistry, Mineralogy and Ore Formation of the NAS of Ukraine, Україна
  • A. V. Kovtun Ukrainian State Geological Prospecting Institute, Україна

DOI:

https://doi.org/10.24028/gzh.0203-3100.v36i2.2014.116130

Ключові слова:

anorthosite, xenolith, zircon, isotopic dating, uranium-lead geochronology method

Анотація

Xenolites of white anorthosites have been found in anorthosites of the main phase of the Novom-irgorod massif of the Korsun-Novomirgorod pluton (the Ukrainian Shield, the Ingul megablock). The age of white anorthosite has been determined by classical uranium-lead method by zircon. Isotopic study of zircon showed considerable dispersion of values that is possibly caused by heterogeneous internal structure zircon crystals and different combination of generations of different ages. The most ancient, practically concordant age has been obtained for two fractions of light rosy zircon (1796-1806 b. y). that is considerably older than the age of zircon from enclosing anorthosites (1750,2 b. y.) and in our opinion characterizes the age of anorthosite. There are several assumptions as to the origin of xenolites of white anorthosites. They can be the earlier phase of basic rocks of the pluton; a fragment of substance of the lower crust transported from the depth and changed by superposed metasomatic and hydrothermal processes, leucocrate variety of «ancient» anorthosite of AMCHG association, represented by white bronsite anorthosites in the Korosten pluton.

Посилання

Verhogljad V. M., 1995. Age stages of magmatism Korostensky Pluto. Geohimija i rudoobrazovanie (21), 34—47 (in Russian).

Geologic time scale Ukrainian Precambrian Shield. (Ed. N. P. Shherbak), 1989. Kiev: Naukova Dumka, 139 p. (in Russian).

Geochronology early dokemriya Ukrainian shield. Proterozoic, (Ed. N. P. Shherbak), 2008. Kiev: Naukova Dumka, 238 p. (in Russian).

Gintov O. B., 2012. Ukrainian Precambrian shield and plate tectonics. Geofizicheskij zhurnal 34(6), 3—21 (in Russian).

Dovbush T. I., Stepanjuk L. M., Shestopalova E. E., 2009. Crystallogenesis and age of zircons from gabbros Korsun-Novomirgorod pluton (Ukrainian shield). Geohimija i rudoobrazovanie, is. 27, 20—24 (in Russian).

Kozlovskaja A. N., Ozhegova M. I., 1958. Explanatory note to the geological and petrographic map Ukrainian crystalline massif. Kiev: KSU Publ., 50 p. (in Russian).

Kononov Ju. V., 1966. Gabbro massifs of the Ukrainian Shield. Kyiv: Naukova Dumka, 99 p. (in Ukrainian).

Krivdik S. G., Dubina O. V., Guravs'kij T. V., 2008. Some mineralogical and petrological characteristics of ore (phosphorus, titanium) gabbros anorthosite- rapakivi granite plutons of the Ukrainian Shield. Mineralogicheskij zhurnal 30(4), 41—57 (in Ukrainian).

Krivdik S. G., Guravs 'kij T V., Dubina O. V., 2009. Material composition of the apatite-ilmenite Nosachivsk field (Korsun-Novomirgorodsky pluton Ukrainian shield). Mineralogicheskij zhurnal 31(3), 55—78 (in Ukrainian).

Lubnina N. V., 2009. East European Craton from Neo- archean to Paleozoic from paleomagnetic data: Dr. geol. sci. diss. Moscow: MSU Publ., 40 p. (in Russian).

Mitrohin O. V., 2011. Anorthosite-rapakivi granite formation of the Ukrainian Shield (geology, material composition and conditions of formation): Dr. geol. sci. diss. Kiev, 36 p. (in Ukrainian).

Mitrohin A. V., Bogdanova S. V., Shumljanskij L. V., 2008. Polybaric crystallization Korosten anorthosite pluton (Ukrainian shield). Mineralogicheskij zhurnal 30(2), 36—56 (in Russian).

SveshnikovK. I., 1981. About age sequence rocks Korsun-Novomirgorod pluton. Geologicheskij zhurnal 41(4), 62—68 (in Russian).

Sobolev V. S., 1974. Petrology of the eastern part of the complex Korosten pluton. Lvov: LSU Publ., 140 p. (in Russian).

##submission.downloads##

Опубліковано

2014-04-01

Як цитувати

Shestopalova, E. E., Stepanyuk, L., Dovbush, T. I., & Kovtun, A. V. (2014). On the age of white anorthosite of the Novomirgorod massif of the Korsun-Novomirgorod pluton (the Ukrainian Shield). Геофізичний журнал, 36(2), 150–160. https://doi.org/10.24028/gzh.0203-3100.v36i2.2014.116130

Номер

Розділ

Наукове повідомлення