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		<isbn>978-85-17-00088-1</isbn>
		<label>59786</label>
		<citationkey>MendesPerCosBruAlm:2017:EsReRo</citationkey>
		<title>Espectroscopia de reflectância de rochas da Suíte Alcalina Juquiá, sudeste do Estado de São Paulo</title>
		<format>Internet</format>
		<year>2017</year>
		<secondarytype>PRE CN</secondarytype>
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		<author>Mendes, Deborah,</author>
		<author>Perrotta, Monica Mazzini,</author>
		<author>Costa, Manoel Augusto Correa da,</author>
		<author>Brumatti, Mariane,</author>
		<author>Almeida, Vidyã Vieira de,</author>
		<electronicmailaddress>deborah.mendes@cprm.gov.br</electronicmailaddress>
		<editor>Gherardi, Douglas Francisco Marcolino,</editor>
		<editor>Aragão, Luiz Eduardo Oliveira e Cruz de,</editor>
		<e-mailaddress>daniela.seki@inpe.br</e-mailaddress>
		<conferencename>Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)</conferencename>
		<conferencelocation>Santos</conferencelocation>
		<date>28-31 maio 2017</date>
		<publisher>Instituto Nacional de Pesquisas Espaciais (INPE)</publisher>
		<publisheraddress>São José dos Campos</publisheraddress>
		<pages>5257-5264</pages>
		<booktitle>Anais</booktitle>
		<organization>Instituto Nacional de Pesquisas Espaciais (INPE)</organization>
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		<abstract>The Juquiá Alkaline Suite occurs in the southern portion of the Ribeira Belt. It constitutes a circular zoned intrusion, with actually exposed area about 14 km², seated in partially fenitized gneisses. In this region occur olivine-pyroxenites and pyroxenites, followed by nefeline-syenites, ijolites, melteijites and urtites, besides central carbonatite occupying around 2.5 km², forming subanelar concentric pattern. Carbonatite Alkaline intrusions located in the Vale do Ribeira (SP-PR) have great significance on the national scene and have been exploited for phosphate for over 50 years. Reflectance spectroscopy data of rock and soil samples of carbonatite, mainly weathered, and barite from veins were acquired in laboratory by the ASD-FieldSpec-3 Hi-Resolution spectrometer. The reflectance spectroscopy has proved to be a relevant tool to the investigation of the Juquiá Alkaline Suite, including the carbonatite rocks and the products of weathering. It was possible to obtain through the technique, the qualitative composition of the main carbonate phase (Fe-dolomite), the identification of neoformed minerals, such as hydroxyapatite in isalterite. The technique has also proved to be a fast and low cost alternative to the identification of rare earth elements. The new data can help the discovery and delimitation of new carbonatite occurrences through multispectral optical remote sensing.</abstract>
		<area>SRE</area>
		<type>Geologia</type>
		<language>pt</language>
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