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Ïîñòóïèëà â ðåäàêöèþ
13 èþëÿ 2012 ã.
ÓÄÊ 549.66 + 549.63/552.331.1 (470.21) ÇÐÌÎ, ¹ 4, 2013 ã.
Zapiski RMO, N 4, 2013
© Ä. ÷ë. Ë. Ì. Ëÿëèíà,* Ä. Ð. Çîçóëÿ,* ä. ÷ë. Å. Ý. Ñàâ÷åíêî,* Ì. Òàðàñîâ,**
Å. À. Ñåëèâàíîâà,* Å. Òàðàñîâà**
ÔÒÎÐÁÐÈÒÎËÈÒ-(Y) È ÈÒÒÐÈÀËÈÒ-(Y)
ÈÇ ÑÈËÅÊÑÈÒΠÊÅÉÂÑÊÈÕ ÙÅËÎ×ÍÛÕ ÃÐÀÍÈÒÎÂ
ÊÎËÜÑÊÎÃÎ ÏÎËÓÎÑÒÐÎÂÀ
* Ãåîëîãè÷åñêèé èíñòèòóò Êîëüñêîãî íàó÷íîãî öåíòðà ÐÀÍ,
184209, Àïàòèòû, óë. Ôåðñìàíà, 14;
e-mail: lialina@geoksc.apatity.ru
** Èíñòèòóò ìèíåðàëîãèè è êðèñòàëëîãðàôèè ÁÀÍ,
1113, Ñîôèÿ, Áîëãàðèÿ, óë. «Àêàä. Ã. Áîí÷åâ», áë. 107;
e-mail: mptarass@dir.bg
Èçó÷åíû ìîðôîëîãèÿ, àíàòîìèÿ è õèìè÷åñêèé ñîñòàâ ôòîðáðèòîëèòà-(Y) èç ñèëåêñèòîâ
êåéâñêèõ ùåëî÷íûõ ãðàíèòîâ Êîëüñêîãî ïîëóîñòðîâà. Âûÿâëåíû òðè ìîðôîëîãè÷åñêèõ òèïà
ôòîðáðèòîëèòà-(Y): I — ãèïèäèîìîðôíûå êðèñòàëëû è çåðíà, II — êñåíîìîðôíûå çåðíà â ñðàñ-
òàíèÿõ ñ èòòðèàëèòîì-(Y) è III — ïîéêèëèòîâûå êðèñòàëëû è «àæóðíûå» àãðåãàòû. Â êðèñòàë-
ëàõ I ìîðôîòèïà ïðîÿâëåíà âíóòðèôàçîâàÿ íåîäíîðîäíîñòü: îò öåíòðàëüíûõ ê êðàåâûì ó÷àñò-
êàì óìåíüøàåòñÿ ñîäåðæàíèå ôîñôîðà è ïðîèñõîäèò èçáèðàòåëüíîå íàêîïëåíèå òÿæåëûõ ðåä-
êîçåìåëüíûõ ýëåìåíòîâ. Îòëè÷èòåëüíîé îñîáåííîñòüþ õèìè÷åñêîãî ñîñòàâà èòòðèàëèòa-(Y)
èç ñèëåêñèòîâ ùåëî÷íûõ ãðàíèòîâ Êîëüñêîãî ïîëóîñòðîâà ÿâëÿåòñÿ óñòîé÷èâî ïîâûøåííîå ñî-
äåðæàíèå òîðèÿ, îòñóòñòâèå àëþìèíèÿ è ôîñôîðà. Äàííûå ïî èçó÷åíèþ ôòîðáðèòîëèòà-(Y) è
èòòðèàëèòa-(Y) ïîçâîëÿþò ïðåäïîëîæèòü, ÷òî â îáðàçîâàíèè ñèëåêñèòîâ ñóùåñòâåííàÿ ðîëü
ïðèíàäëåæèò ãèäðîòåðìàëüíûì ïðîöåññàì.
Êëþ÷åâûå ñëîâà: ôòîðáðèòîëèò-(Y), èòòðèàëèò-(Y), ñèëåêñèòû, ùåëî÷íûå ãðàíèòû, Êåé-
âû, Êîëüñêèé ïîëóîñòðîâ.
L. M. LYALINA, D. R. ZOZULYA, Ye. E. SAVCHENKO, M. P. TARASOV, E. A. SELIVANOVA,
E. TARASOVA. FLUOROBRITHOLITE-(Y) AND YTTRIALITE-(Y) FROM SILEXITES
OF KEIVY PERALKALINE GRANITES OF KOLA PENINSULA
Investigation of morphology, anatomy and chemical composition of the fluorobritholite-(Y) and
yttrialite-(Y) from silexites related to Keivy peralkaline granite of Kola Peninsula have shown that
these minerals are the main REE concentrators in silexites and their content reaches 10—15 %
vol
.
Britholite and yttrialite are associated there with zircon, aeshynite-(Y), chevkinite-(Ce), fergusoni-
te-(Y), thorite, monazite-(Ce), xenotime-(Y) and bastnaesite-(Ce). Three morphological types of fluo-
robritholite-(Y) have been revealed: I — hypidiomorphic crystals and grains, II — xenomorhic grains
in intergrowths with yttrialite-(Y), III — poikilitic crystals and skeleton aggregates. These different
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