Title Composition of zircons and monazites from the glaciofluvial sediments in Ukraine (East European Platform) and the Antarctic Peninsula (West Antarctica); comparison and interpretation [Geokhimiia tsirkonov i monatsitov iz allyuvnal'nykh i lednikovykh otlozhenii Ukrainy (Vostochno-Evropeiskaia platforma) i Antarkticheskogo Poluostrova (Zapadnaia Antarktika); sopostavlenie i vozmozhnaia interpretatsiia]
Author Savenok, S.P.; Shnyukov, S.E.; Andreev, A.V.; Morozenko, V.R.
Author Affil Savenok, S.P., Taras Shevchenko National University, Department of Geology, Kiev, Ukraine
Source Ukrayins'kii Antarktichnii Zhurnal = Ukrainian Antarctic Journal, 2005(3), p.57- 66, . Publisher: Ukrayins'kii Antarktichnii Tsentr, Kiev, Ukraine. ISSN: 1727- 7485
Publication Date 2005
Notes In Russian with English and Ukrainian summaries. 24 refs. Ant. Acc. No: 87756
Index Terms Antarctica--Antarctic Peninsula; polar regions; Ukraine--Russian Platform; Antarctica--West Antarctica; absolute age; actinides; alluvium; Antarctic Peninsula; Antarctica; Archean; chemical composition; clastic sediments; Commonwealth of Independent States; crust; detritus; Europe; fluvial sedimentation; glacial sedimentation; glaciofluvial sedimentation; hafnium; International Polar Year 2007-08; IPY 2007-08 Research Publications; lead; metals; monazite; nesosilicates; orthosilicates; phosphates; Precambrian; rare earths; Russian Platform; sedimentation; sediments; silicates; single-crystal method; spectra; statistical analysis; thorium; trace elements; U/Th/Pb; Ukraine; West Antarctica; X-ray fluorescence spectra; yttrium; zircon; zircon group
Abstract The results of single-grain geochemical study of zircon (n = 2684) and monazite (n = 937) large detrital populations from glacial and alluvial sediments that reflect provenance within (1) the southern part of East-European Platform (EEP), including Ukrainian Shield, and (2) the subglacial area of Antarctic Peninsula (AP) in West Antarctica are presented in the paper. Trace element (Hf, Y, Th, U, Pb etc.) content in both minerals was determined by means of special "single-grain" version of milliprobe X-rai fluorescence analysis (XRF- MP/SG). "Total lead" method was used for zircon and monazite single-grain approximate age dating. Geochemical grouping of zircon grains as well as their parent rock type identification were realized on the basis of earlier suggested Hf-Y discriminant diagram. This new data set may be regarded as a representative contribution to present-day information about the crustal evolution within the both EEP and AP regions. For example a new unknown earlier stage of significant formation of monazite (~0.5-0.7 Ga) was discovered. Numerous data on zircon single-grain geochemistry resulted in regional-scale models of progressive growth of the Earth's crust. Taking into account that subglacial terranes of Antarctica are inaccessible for direct study, such approach is proposed for their investigation within the project "Circum Antarctic Zircon Census" (CAZIC) in the framework of IPY 2007/2008 program.
Publication Type journal article
Record ID 298436