Identyfikatory
Warianty tytułu
Initial recognition of zirconium-hafnium rims around ore minerals in the Fe-Ti-V deposits, Suwałki Anorthosite Massif (NE Poland)
Języki publikacji
Abstrakty
Zirconium-hafnium rims were discovered and described for the first time within the Suwalki Anorthosite Massif (SAM). They are observed at boundaries of Fe-Ti oxides ilmenite, hematitoilmenite and titanomagnetite with plagioclases. The most frequent forms reach 80-250 μm in length and 4-30 μm in width. These are narrow rims covering even up to 70% ore mineral grains. The most spectacular forms were "blown candle flame” structures. Their average width ranges from 20 to 45 μm and the length exceeds 350 μm in . Chemical composition analysis was carried out on the largest clusters of zircon crystals/rims which show high local enrichment in Hf (0.5-0.8% by weight). The boundaries of these crystals are cracked and blurry. This may suggest their participation in later fluids inflow processes within the rocks. The enrichment in hafnium content in zircon grains, is related to significant reduction in the amount of Th, U and Pb and increased amount- sof Ti and Fe in zircon rims. A large variety of forms and variability of their chemical composition point to a complex physical chemical orgin process.
Czasopismo
Rocznik
Tom
Strony
107--110
Opis fizyczny
Bibliogr. 9 poz., rys.
Twórcy
autor
- Instytut Geochemii, Mineralogii i Peterologii, Uniwersytet Warszawski, ul. Żwirki i Wigury 93, 02-089 Warszawa
autor
- Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy, ul. Rakowiecka 4, 00-975 Warszawa
Bibliografia
- 1. CHARLIER B., SKRA 0., KORNELIUSSEN A., DUCHESNE J.C., AUWERA J.V. 2007 - Ilmenite composition in the Tellnes Fe-Ti deposit, SW Norway: fractional crystallization, postcumulus evolution and ilmenite - zircon relation. Contrib Mineral. Petrol., 154: 119-134.
- 2. EICHSTAEDT 1.1973 - Księga Pierwiastków., Wyd. Wiedza Powszechna.
- 3. MORISSET C.E., SCOATES J.S. 2008 - Origin of zircon rims around ilmenite in mafic plutonic rocks of Proterozoic anorthosite suites. The CanadianMineralogist, 46: 289-304.
- 4. NASLUND H.R. 1987 - Lamellae of baddeleyite and Fe-Cr spinel in ilmenite from the Bassistoppen Sill, East Greenland. Can. Mineral., 25: 91-96.
- 5. NICKEL E.H. 1958 - The composition and microtextures of an ulvospinel-magnetite intergrowth. Can. Miner., 6: 702-705.
- 6. SPECZIK S., WISZNIEWSKAJ., DIEDEL R. 1988 - Minerals, exsolution features andgeochemistry of Fe-Ti ores ofthe Suwałki district (North-East Poland). Mineralium Deposita, 23: 200-210.
- 7. TAYLOR R.V. 1964 - Phase equilibrium in the system FeO-Fe2O3-TiO2 at 1300°C. Am. Mineral., 49: 1016-1030.
- 8. WISZNIEWSKA J. 1993 - Mineralizacja kruszcowa w skałach masywu suwalskiego. Przewodnik LXIV Zjazdu Polskiego Towarzystwa Geologicznego, 29-36.
- 9. WISZNIEWSKA J. 2002 - Wiek i geneza rud Fe-Ti-V i skał towarzyszących w suwalskim masywie anortozytowym (północno-wschodnia Polska). Biul. Państ. Inst. Geol., 401.
Uwagi
Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-08e007a0-34fc-4e2a-8187-49b9d0f8a55b