{"id":1154,"date":"2021-06-21T16:57:47","date_gmt":"2021-06-21T19:57:47","guid":{"rendered":"https:\/\/csr.ufmg.br\/ppgamsa\/?p=1154"},"modified":"2024-09-10T16:34:59","modified_gmt":"2024-09-10T19:34:59","slug":"defesa-de-dissertacao-rafael-tarantino","status":"publish","type":"post","link":"https:\/\/csr.ufmg.br\/ppgamsa\/defesa-de-dissertacao-rafael-tarantino\/","title":{"rendered":"Defesa de Disserta\u00e7\u00e3o &#8211; Rafael Tarantino"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;border-width: 0px 0px 0px 0px;border-color:#eae9e9;border-style:solid;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start\" style=\"max-width:1248px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\"><div class=\"fusion-column-wrapper fusion-flex-justify-content-flex-start fusion-content-layout-column\" style=\"background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;padding: 0px 0px 0px 0px;\"><style type=\"text\/css\">@media only screen and (max-width:1024px) {.fusion-title.fusion-title-1{margin-top:10px!important;margin-bottom:30px!important;}}<\/style><div class=\"fusion-title title fusion-title-1 fusion-title-text fusion-title-size-one\" style=\"margin-top:10px;margin-bottom:30px;\"><div class=\"title-sep-container title-sep-container-left fusion-no-large-visibility fusion-no-medium-visibility fusion-no-small-visibility\"><div class=\"title-sep sep-\" style=\"border-color:#ae895d;\"><\/div><\/div><h1 class=\"title-heading-left\" style=\"margin:0;\">Not\u00edcias<\/h1><div class=\"title-sep-container title-sep-container-right\"><div class=\"title-sep sep-\" style=\"border-color:#ae895d;\"><\/div><\/div><\/div><div class=\"fusion-text fusion-text-1\"><h2 class=\"fusion-responsive-typography-calculated\" style=\"--fontsize: 26; line-height: 1.07;\" data-fontsize=\"26\" data-lineheight=\"27.82px\">defesa de disserta\u00e7\u00e3o &#8211; rafael tarantino<\/h2>\n<p>O Programa de P\u00f3s-gradua\u00e7\u00e3o em An\u00e1lise e Modelagem de Sistemas Ambientais do Instituto de Geoci\u00eancias da UFMG convida para a seguinte apresenta\u00e7\u00e3o:<\/p>\n<p>DEFESA DE DISSERTA\u00c7\u00c3O<\/p>\n<p>Discente: Rafael Tarantino Amarante<\/p>\n<p>Orientadora: Profa. Dra. \u00darsula Ruchkys de Azevedo<\/p>\n<p>T\u00edtulo: Mapeamento Geoqu\u00edmico por Sedimentos de Corrente na borda do Cr\u00e1ton S\u00e3o Francisco e Cintur\u00e3o Bras\u00edlia, Minas Gerais: defini\u00e7\u00e3o de background geoqu\u00edmico e aplica\u00e7\u00e3o de an\u00e1lise estat\u00edstica multivariada<\/p>\n<p>Resumo:<\/p>\n<p>O impacto ambiental sobre ambientes fluviais possui crescente aten\u00e7\u00e3o p\u00fablica com as trag\u00e9dias de rompimentos de barragens que promoveram a dispers\u00e3o de elementos potencialmente t\u00f3xicos em cursos d\u2019\u00e1gua dos Rio Doce e Paraopebas, fatos que expuseram a necessidade de aplica\u00e7\u00e3o de ferramentas de monitoramento regional dos recursos h\u00eddricos. Entretanto a an\u00e1lise ambiental que aborda concentra\u00e7\u00f5es qu\u00edmicas an\u00f4malas em sedimentos, possui como fator limitante as defini\u00e7\u00f5es dos valores que s\u00e3o naturais e quais possuem influ\u00eancia antr\u00f3pica. Para tanto a defini\u00e7\u00e3o de background aliada ao mapeamento geoqu\u00edmico possibilitam a regionaliza\u00e7\u00e3o cartogr\u00e1fica de dados para representar da rela\u00e7\u00e3o espacial da dispers\u00e3o qu\u00edmica, bem como definir as prov\u00e1veis fontes litol\u00f3gicas e sob influ\u00eancia antr\u00f3pica.<\/p>\n<p>Este projeto visa definir valores de background em conjunto com t\u00e9cnicas de mapeamento geoqu\u00edmico para estabelecer as concentra\u00e7\u00f5es naturalmente an\u00f4malas e quais podem ser considerados influ\u00eancia antr\u00f3pica em sedimentos das bacias dos rios S\u00e3o Francisco e Parana\u00edba, sob o contexto geotect\u00f4nico da borda do Cr\u00e1ton S\u00e3o Francisco com o Cintur\u00e3o Bras\u00edlia, em Minas Gerais. As an\u00e1lises foram aplicadas sobre dados de concentra\u00e7\u00e3o qu\u00edmica de sedimentos do projeto Vazante-Paracatu do Servi\u00e7o Geol\u00f3gico do Brasil \u2013 CPRM. As amostras foram analisadas em ICP-OES e ICP-MS para elementos maiores, menores e tra\u00e7os, totalizando 53 elementos. O background foi calculado por diversos m\u00e9todos amplamente utilizados na literatura, a saber: mediana + 2x MAD, TIF e baseada em percentis. Foram gerados de sum\u00e1rios estat\u00edsticos, boxplots e teste de normalidade para avaliar a distribui\u00e7\u00e3o espacial das anomalias geoqu\u00edmicas. Enquanto a an\u00e1lise bivariada, atrav\u00e9s da matriz de correla\u00e7\u00e3o, permite obter as principais associa\u00e7\u00f5es geoqu\u00edmicas utilizadas como pr\u00e9-requisito para aplica\u00e7\u00e3o da An\u00e1lise Fatorial, esta por sua vez foi realizada atrav\u00e9s do m\u00e9todo de extra\u00e7\u00e3o dos fatores principais, com pr\u00e9via transforma\u00e7\u00e3o do dado pela raz\u00e3o logar\u00edtmica CLR.<\/p>\n<p>O resultado do background geoqu\u00edmico, definido por unidades litol\u00f3gicas principais, possibilitou avaliar o enriquecimento natural de certos elementos presentes nestas rochas, bem como permitir a defini\u00e7\u00e3o dos limiares de concentra\u00e7\u00f5es naturais segundo o contexto regional da \u00e1rea de estudo. Foi poss\u00edvel espacializar e identificar anomalias para Fe (&gt;14,59%), Al (&gt;7,37%), Mg(&gt;0,82%), P (&gt;1567 mg\/kg), Zn (&gt;206 mg\/kg), Pb, Cd (&gt;0,47 mg\/kg), Cu (&gt;89 mg\/kg), Ni (&gt;94,90 mg\/kg), Cr (&gt;170 mg\/kg), As (&gt;38 mg\/kg), Ba (&gt;295 mg\/kg), Co (&gt;155,10 mg\/kg), ETRL(&gt;312,00 mg\/kg), Th (&gt;21,01 mg\/kg), U (&gt;3,25 mg\/kg), V (214 mg\/kg). A an\u00e1lise fatorial resultou em 6 fatores principais que representam 8 principais associa\u00e7\u00f5es geoqu\u00edmicas da \u00e1rea de estudo, s\u00e3o elas: (1) Co, Mg, Ni e Zn; (2) Al, Cs, Ga, Sn e V; (3) Cr, Ni e V; (4) Cs, K e Rb; (5) As e Fe; (6) Cd, Pb e Zn; (7) ETRL, Th e U; (8) Ba, P e Sr.<\/p>\n<p>Data: 30 de junho de 2021<\/p>\n<p>Hor\u00e1rio: 14:00<\/p>\n<p>Link: <a href=\"https:\/\/meet.google.com\/nda-jzbp-eso\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/meet.google.com\/nda-jzbp-eso<\/a><\/p>\n<\/div><\/div><\/div><style type=\"text\/css\">.fusion-body .fusion-builder-column-0{width:100% !important;margin-top : 0px;margin-bottom : 20px;}.fusion-builder-column-0 > .fusion-column-wrapper {padding-top : 0px !important;padding-right : 0px !important;margin-right : 1.92%;padding-bottom : 0px !important;padding-left : 0px !important;margin-left : 3.552%;}@media only screen and (max-width:1024px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}@media only screen and (max-width:640px) {.fusion-body .fusion-builder-column-0{width:100% !important;order : 0;}.fusion-builder-column-0 > .fusion-column-wrapper {margin-right : 1.92%;margin-left : 1.92%;}}<\/style><\/div><style type=\"text\/css\">.fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link) , .fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link):before, .fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link):after {color: #00b29d;}.fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link):hover, .fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link):hover:before, .fusion-fullwidth.fusion-builder-row-1 a:not(.fusion-button):not(.fusion-builder-module-control):not(.fusion-social-network-icon):not(.fb-icon-element):not(.fusion-countdown-link):not(.fusion-rollover-link):not(.fusion-rollover-gallery):not(.fusion-button-bar):not(.add_to_cart_button):not(.show_details_button):not(.product_type_external):not(.fusion-view-cart):not(.fusion-quick-view):not(.fusion-rollover-title-link):not(.fusion-breadcrumb-link):hover:after {color: #00b29d;}.fusion-fullwidth.fusion-builder-row-1 .pagination a.inactive:hover, .fusion-fullwidth.fusion-builder-row-1 .fusion-filters .fusion-filter.fusion-active a {border-color: #00b29d;}.fusion-fullwidth.fusion-builder-row-1 .pagination .current {border-color: #00b29d; 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