ON THE GEOCHEMISTRY OF NIOBIUM AND TANTALUM IN THE LOVOZERO ALKALINE MASSIF

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Geokhimiya (U.S.S.R.) For English translation 1956-63 see Geochemistry (USSR)

OSTI ID:4208399

Gerasimovskii, V I; Kakhana, M M; Rodionova, L M; Venkina, V A

In the nepheline syenites of the Lovozero massif (Kola peninsula), niobrum and tantalum are concentrated in mrnerals which contain titanium and zircomum and isomorphously replace these elements in them, In the formation process of rocks of the massif which, compared to other types of magroatic rocks, is enriched in niobium and tantalum, a separation of niobium from tantalum does not occur. The niobium/tantalum ratio for nepheline syenites is the same ( approximately 121 for different intrusive phases. An increase of tantalum with regard to niobiura is even not observed in rocks being considerably enriched in zirconium. Towards the end of the magmatic process an accumulation of niobium and tantalum takes place; their relative concentration compared to titanium increases simultaneously. (auth)

• Research Organization: Vernadskii Inst. of Geochemistry and Analytical Chemistry, Moscow
• NSA Number: NSA-14-006514
• OSTI ID: 4208399
• Journal Information: Geokhimiya (U.S.S.R.) For English translation 1956-63 see Geochemistry (USSR), Journal Name: Geokhimiya (U.S.S.R.) For English translation 1956-63 see Geochemistry (USSR) Vol. Vol: No. 7; ISSN GEOKA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ALUMINUM SILICATES
DISTRIBUTION
GEOCHEMISTRY
GEOLOGY
GEOLOGY, MINERALOGY, AND METEOROLOGY
IGNEOUS ROCKS
MINERALS
NEPHELITE
NIOBIUM
POTASSIUM SILICATES
QUANTITY RATIO
ROCKS
SODIUM SILICATES
SYENITES
TANTALUM
TITANIUM
ZIRCONIUM