{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,3,30]],"date-time":"2022-03-30T10:16:22Z","timestamp":1648635382555},"reference-count":13,"publisher":"FapUNIFESP (SciELO)","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rem: Rev. Esc. Minas"],"published-print":{"date-parts":[[2010,9]]},"abstract":"<jats:p>Em in\u00fameros dep\u00f3sitos minerais, a distribui\u00e7\u00e3o de teores na transi\u00e7\u00e3o entre as v\u00e1rias forma\u00e7\u00f5es geol\u00f3gicas presentes \u00e9, normalmente, abrupta ou at\u00e9 irregular. Nestes casos, a avalia\u00e7\u00e3o de reservas e a quantifica\u00e7\u00e3o local de par\u00e2metros de qualidade t\u00eam de tomar em conta a exist\u00eancia das heterogeneidades que condicionam as transi\u00e7\u00f5es bruscas de teores da vari\u00e1vel em estudo, no espa\u00e7o. Nesse artigo \u00e9 apresentada uma metodologia de avalia\u00e7\u00e3o de reservas por estima\u00e7\u00e3o geoestat\u00edstica, que tem em conta as zonalidades espaciais resultantes da g\u00eanese dos jazigos e que se traduz por transi\u00e7\u00f5es abruptas de teores entre as diversas forma\u00e7\u00f5es geol\u00f3gicas. Embora o desenvolvimento dessa metodologia seja apresentado para duas fases geol\u00f3gicas, a generaliza\u00e7\u00e3o para uma situa\u00e7\u00e3o multi-fase, do ponto de vista morfol\u00f3gico, \u00e9 imediata. A metodologia proposta \u00e9 ilustrada na avalia\u00e7\u00e3o de reservas de diamantes num jazigo aluvionar, envolvendo a estima\u00e7\u00e3o da possan\u00e7a e acumula\u00e7\u00e3o em duas unidades geol\u00f3gicas (teores superiores a zero e teores iguais a zero).<\/jats:p>","DOI":"10.1590\/s0370-44672010000300021","type":"journal-article","created":{"date-parts":[[2010,9,23]],"date-time":"2010-09-23T00:21:36Z","timestamp":1285201296000},"page":"563-568","source":"Crossref","is-referenced-by-count":0,"title":["Delimita\u00e7\u00e3o e avalia\u00e7\u00e3o de reservas em jazigos aluvionares diamant\u00edferos a partir da acumula\u00e7\u00e3o de teores"],"prefix":"10.1590","volume":"63","author":[{"given":"Jos\u00e9 A.","family":"Almeida","sequence":"first","affiliation":[{"name":"Universidade Nova de Lisboa,  Portugal"}]}],"member":"530","reference":[{"key":"ref1","series-title":"Geostatistics Wollongong'96","first-page":"658","volume-title":"Zonal control to estimate classes of histograms: application to a diamond alluvial deposit","volume":"2","author":"ALMEIDA J.","year":"1997"},{"key":"ref2","series-title":"Geostatistics: modeling spatial uncertainty","author":"CHILES J. 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