2019-08-292019-08-292010-01SOLEDADE, Gilvana Lima . Estudo de zircões do granito madeira , província estanífera do pitinga (AM), através de microscopia eletrônica de varredura , catodoluminescência e difração de raios - x. Orientador: Claudio Nery Lamarão. 2010. 81 f. Trabalho de Curso (Bacharelado em Geologia) – Faculdade de Geologia, Instituto de Geociências, Universidade Federal do Pará, Belém, 2010. Disponível em:http://bdm.ufpa.br/jspui/handle/prefix/1713. Acesso em:.http://bdm.ufpa.br/jspui/handle/prefix/1713ABSTRACT Zircon is a very common accessory mineral in intermediate to felsic igneous rocks and one of the most resistant mineral to metamorphic, hydrothermal and weathering processes. It´s high chemical stability, associated with the presence of characteristic trace elements in their internal structure, such as Hf, Y, Nb, Th, and U, may be useful in identifying the nature of its original magma and in the characterization of magmatic fractionation processes. Zircon crystals of tin-granites have low Zr/Hf ratios, and are enriched in Y, Th and U towards the more evolved facies. When compared to zircons of no tin-mineralized granitic rocks suggest an effective participation of magmatic differentiation or hydrothermal alteration of their host rocks by F-rich fluids in their genesis. The geochemical signature found in zircon crystals of tin-specialized granites from different provinces of the Amazonian Craton shows that zircon composition can be used as a prospective guide for such type of mineralization. This work identified and characterized zircon crystals and accessory phases (mineral inclusions) found in different facies of the Madeira Granite, Pitinga Province, using backscattered electron (BSE) and cathodoluminescence images, and semiquantitative chemical analysis using a scanning electron microscope (SEM) coupled with an EDS (Energy Dispersive Spectrometry), and X-ray diffractometry (XRD). The morphological characteristics, the amount and type of mineral inclusions, and the chemical composition of zircon crystals belonging to the wallrock rocks differ significantly from those characteristics found in zircon crystals from the mineralized facies of the albite granite, indicating that although semi-quantitative, the used methodology can be a useful tool for the preliminary assessment of the potential of tin-granites.Acesso AbertoCassiteritaZircãoGranito MadeiraProvíncia PitingaCNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::GEOLOGIATrabalho de Curso - Graduação - Monografia