Lisna I.M.1, Kasianenko K.O.2
1.M.P. Semenenko Institute of geochemistry, mineralogy and ore formation NAS of Ukraine
2.Taras Shevchenko National University of KyivInstitute of Geology
Language: Russian
Geochemistry and ore formation 2015, 35: 29–36
https://doi.org/10.15407/gof.2015.35.029
Lityn block consists mostly enderbites, with relicts of pyroxene crystalline schists. The structure is bordering by granitoid Berdichev complex- granites with relics of garnet-biotite gneisses and crystalline schists hypersthene. Enderbites of Lityn dome structure studied in the Lityn and Malinovka quarries, the distance between which is 7 km away, while the size of the Lityn structure is 20–30 km. For enderbite of these ancient quarries set Sm-Nd age of (DM), equal to 3,65 Ga. This suggests that these quarries are enderbites projection ancient basement rocks, converted by subsequent tectonic and magmatic events, one of which is fixed by the isotope uranium lead method (on zircon) in the 2,8–2,9 Ga. In the study of rocks from these quarries it turned out that they differ both in the chemical composition and on the appearance of accessory zircons. Enderbites Malinovka quarriy more ferruginous (F = 66–78 % compared with 50–61 % in Lityn quarry, less magnesian). In enderbites of Lityn observed heredity main characteristics of zircons from zircons enderbite- gneisses of gaivoronsky complex, well-studied in quarries Odessa and Kossack Yar, uranium-lead dating more than 3,65 Ga. In a Malinovka quarry zircons morphology and internal structure different from zircons of enderbite Lityn quarry, that show more in favor of a substrate for them the volcanic mid-acid composition
Кеу words: zircon, isotopic age, Lityn block.
Reference
1. Bybykova E.V. Drevneishye porod y Zemly: yzotopnaia heokhronolohyia y heokhymyia yzotopov. Mineral. journ. 2004, 26, No 3, pp. 13-20.
2. Bybykova E.V., Klaesson S., Fedotova A.A. y dr. Yzotopno-heokhronolohycheskoe (U – Th – Pb, Lu – Hf) yzuchenye tsyrkonov arkheiskykh mahmatycheskykh y metaosadochn ykh porod Podolskoho domena Ukraynskoho shchyta. Heokhymyia. 2013, No 2, pp. 99-121.
3. Bybykova E.V. Ranniaia kora Zemly v svete yzotopno-heokhymycheskykh y yzotopno-heokhronolohycheskykh dannykh. Mineral. journ. 2014, 36, No 2, pp. 18-26.
4. Kasianenko K.O., Ponomarenko O.M., Vyshnevskyi O.A. Petroloho-heokhimichna kharakterystyka charnokitoidiv Litynskoi kupolopodibnoi struktury (Dnistersko-Buzkyi mehablok Ukrainskoho shchyta). Mineralohichnyi zbirnyk. 2014, Vyp. 2, No 64, pp. 115-124.
5. Kyryliuk V.P. Pobuzhskyi hranulytovyi kompleks. Hranulytovye strukturno-formatsyonnye kompleksy Ukraynskoho shchyta. Putevodytel heolohycheskoi ekskursyy. Lvov, 2010, pp. 8-63.
6. Krochuk V.N., Lesnaia Y.M. Krystallohenezys tsyrkona yz enderbytov Pobuzhia. Dokl. AN USSR, ser.B. 1986, No 5, pp. 8-10.
7. Letnykov F.A., Leontev A.N., Hantymurova T.P. Hranytoydy hlybovykh oblastei. Novosybyrsk. Nauka, 1975, 213 p.
8. Lesnaia Y.M. Heokhronolohyia charnokytoydov Pobuzhia. Kyiv. Nauk. dumka, 1988, 133 p.
9. Lesnaia Y.M., Ponomarenko A.N., Levkovskaia N.Iu. Tsyrkon – yndykator drevneishykh porod protokontynentalnoi kory. Mineral. journ. 2000, 22, No 4, pp. 31-36.
10. Lesnaia Y.M., Kasianenko E.O., Somka L.V. Dannye yzotopnoho vozrasta porod tyvrovskoiy bereznynskoi tolshch dnestrovsko-buhskoi seryy Verkhneho Pobuzhzhia (Ukraynskyi shchyt). Heokhronolohyia y heodynamyka ranneho dokembryia (3,6-1,6 mlrd let) Evrazyiskoho kontynenta. Tez. dokl. mezhdunarod. nauchn. Konf. Kyiv. 2014, pp. 80-81.
11. Lobach -Zhuchenko S.B., Stepaniuk L.M., Ponomarenko A.N. y dr. Vozrast tsyrkonov yz enderbyto –hneisov Sredneho Pobuzhzhia (Dnestrovsko-Buhskyi mehablok Ukraynskoho shchyta). Mineral. journ., 2011, 33, No 1, pp. 3-14.
12. Lobach -Zhuchenko S.B., Balahanskyi V.V., Baltybaev Sh.K. y dr. Etapy formyrovanyia Pobuzhskoho hranulytovoho kompleksa po dannym yzotopno-heokhronolohycheskykh yssledovanyi (Srednee Pobuzhe, Ukraynskyi shchyt). Mineral. journ. 2013, 35, No4, pp. 86-98.
13. Lobach -Zhuchenko S.B., Kaulyna T.V., Hlebovytskyi V.A. y dr. 3,5 mlrd let (SHRIMP II) U – Pb vozrast hranulytov Pobuzhskoho hranulytovoho kompleksa, Ukraynskyi shchyt. Dokl. RAN. 2014, 456, No 5, pp. 581-585. https://doi.org/10.1134/S1028334X14060257
14. Polovynkyna Yu.Yr., Nalyvkyna E.B. Henezys charnokytov Ukrayny. Dokl. sov. heolohov. Problema 13 Charnokyty. Moscow. Nauka, 1964, pp. 7-11.
15. Riabenko V.A. Osnovnye cherty tektonycheskoho stroenyia Ukraynskoho shchyta. K. Nauk. dumka, 1970, 125 p.
16. Syvoronov A.A., Lysak A.M., Pashchenko V.H. Problemy raschlenenyia hranytoydov nyzhneho dokembryia (na prymere Ukraynskoho shchyta). Mezhdunarod. nauch. konf. Heokhronolohyia y heodynamyka ranneho dokembryia (3,6–1,6mlrd let) Evrazyiskoho kontynenta. Tez. dokl. Kyiv., 2014, pp. 110–111.
17. Stepaniuk L.M., Bybykova E.V., Klaisen S., Skobelev V.M. Sm – Nd yzotopnaia systema v dokembryiskykh porodakh Ukraynskoho shchyta. Mineral. journ. 1998, 20, No 5, pp. 72-79.
18. Stepaniuk L.M. Heokhronolohiia dokembriiu zakhidnoi chastyny Ukrainskoho shchyta (arkhei – paleoproterozoi). Avtoref. dys… d -ra heol. nauk. Kyiv., 2000, 34 p.
19. Stepaniuk L.M., Mytrokhyn A.V., Kryvdyk S. H. y dr. Hranytoydy Volynskoho y Dnestrovsko –Buhskoho mehablokov Ukraynskoho shchyta. Putevodytel ekskursyy nauchnoi konferentsyy. Hranytoydy: uslovyia formyrovanyia y rudonosnost. Kyiv. 2013, 38 p.
20. Shumlianskyi L.V. Heokhimiia piroksenovykh plahiohneisiv (enderbitiv) Pobuzhzhia ta izotopnyi sklad hafniiu v tsyrkonakh. Mineral. journ. 2012, 34, No 2, pp. 64-79.
21. Shcherbak N.P., Artemenko H.V., Lesnaia Y.M., Ponomarenko A.N. Heokhronolohyia ranneho dokembryia Ukraynskoho shchyta (arkhei). Kyiv. Nauk. dumka, 2005, 242 p.
22. Krogh T.E. A low contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations. Geochim. Cosmochim. Acta., 1973, 37, pp. 485-494. https://doi.org/10.1016/0016-7037(73)90213-5
23. Ludwig K.R. ISOPLOT for MS -DOS a plotting and regression program for radiogenic -isotope data, for IBM –PC compatible computers, version 2.02. U.S. Geological Survey Open. 1990, File Report, 88-557. 64 pp. https://doi.org/10.3133/ofr91445
24. Ludwig K.R. PbDAT for MSDOS: A computer program for IBM -PC compatibles for processing raw Pb–U–Th isotope data, version 1.06. Ibid. 1989, File Report 88-542. 40 pp. https://doi.org/10.3133/ofr88542
25. SteigerR.H. Subcomission of Geochronology: convension of the use of decay constans in geo- and cosmochronology. Earth Plan. Sci. Let. 1976, 36, pp. 359-362. https://doi.org/10.1016/0012-821X(77)90060-7
26. Stacey J.S. Approximation of terrestriallead isotope evolution by a two stage model. Ibid. 1975, 26, pp. 207-221. https://doi.org/10.1016/0012-821X(75)90088-6