Инд. авторы:	Zaccaria D., Vicentini N., Perna M.G., Rosatelli G., Sharygin V.V., Humphreys-Williams E., Bauthornscombe W., Stoppa F.
Заглавие:	Lamprophyre as the Source of Zircon in the Veneto Region, Italy
Библ. ссылка:	Zaccaria D., Vicentini N., Perna M.G., Rosatelli G., Sharygin V.V., Humphreys-Williams E., Brownscombe W., Stoppa F. Lamprophyre as the Source of Zircon in the Veneto Region, Italy // MINERALS. - 2021. - Vol.11. - Iss. 10. - Art.1081.
Внешние системы:	DOI: 10.3390/min11101081; WoS: 000717074500001;
Реферат:	eng: Discrete zircons, up to 9 mm in length, occur in alluvial deposits from the Veneto area. They are likely derived from the disaggregation of lamprophyric rocks belonging to a regional, pervasive dyke-swarm. Zircon and REE phases occur in both alkaline lamprophyres and connate calcite-bearing felsic lithics and their debris in lamprophyre breccia. We present 36 new complete U-Pb and trace element analyses of zircons and associated inclusions. We used a statistical approach on a larger dataset using new and literature data to evaluate the confidence figure to give an estimation of age of zircons. Inclusions suggest a genetic link with an S-CO2-ZrO-BaO-SrO-CaO-rich fluid/melt possibly associated with carbonate-rich alkaline parental magma and a metasomatised mantle source. This paper confirms the importance of calcite-syenite and lamprophyre genetic link and zircon magmatic origin, in contrast with hydrothermal and metamorphic zircons. U-Pb dating by LA-ICP-MS provides time constrains (40.5-48.4 Ma, Lutetian), consistent with the age of the alkaline magmatic event. Trace element data indicate a link to anorogenic magmatism associated with mantle upwelling. Complex zoning is highlighted by cathodoluminescence images. The Veneto zircons are helpful for regional geological information and may have commercial potential as a critical resource for green technologies.
Ключевые слова:	zircon geochemistry; Veneto region; Italy; TRACE-ELEMENT COMPOSITION; A-TYPE GRANITES; NB-TA; SUBDUCTION; U-Pb dating; BENEATH; PROVINCE; CONSTRAINTS; METASOMATISM; ROCKS; CHEMISTRY; zircon; lamprophyres;
Издано:	2021
Физ. характеристика:	1081