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• W2364579080 abstract "Abstract The Itataia phosphate-uranium deposit is located in Santa Quiteria, in central Ceara State, northeastern Brazil. Mineralization has occurred in different stages and involves quartz leaching (episyenitization), brecciation and microcrystalline phase formation of concretionary apatite. The last constitutes the main mineral of Itatiaia uranium ore, namely collophane. Collophanite ore occurs in massive bodies, lenses, breccia zones, veins or episyenite in marble layers, calc-silicate rocks and gneisses of the Itataia Group. There are two accepted theories on the origin of the earliest mineralization phase of Itataia ore: syngenetic (primary) – where the ore is derived from a continental source and then deposited in marine and coastal environments; and epigenetic (secondary) – whereby the fluids are of magmatic, metamorphic and meteoric origin. The characterization of pre- or post-deformational mineralization is controversial, since the features of the ore are interpreted as deformation. This investigation conducted isotopic studies and chemical analyses of minerals in marbles and calc-silicate rocks of the Alcantil and Barrigas Formations (Itataia Group), as well as petrographic and structural studies. Analysis of the thin sections shows at least three phosphate mineral phases associated with uranium mineralizaton: (1) A prismatic fluorapatite phase associated with chess-board albite, arfvedsonite and ferro-eckermannite; (2) a second fluorapatite phase with fibrous radial or colloform habits that replaces calcium carbonate in marble, especially along fractures, with minerals such as quartz, chlorite and zeolite also identified in calc-silicate rocks; and (3) an younger phosphate phase of botryoidal apatite (fluorapatite and hydroxyapatite) related with clay minerals and probably others calcium and aluminum phosphates. Detailed isotopic analysis carried out perpendicularly to the mineralized levels and veins in the marble revealed significant variation in isotopic ratios. Mineralized zones exhibit a decrease in δ13C and δ18O isotope values and a higher 87Sr/86Sr ratio toward the center of the vein. In conjunction with petrographic studies, these changes contesting the hypothesis of a sedimentary origin for uranium and suggest a radiogenic Sr input by alkaline to peralkaline fluids from fertile granites of the end of Brasiliano/Pan-African orogeny, located outside the deposit. The origin of the phosphorous is associated with phosphorite deposits in the same depositional environment of the neoproterozoic supracrustal quartz-pelite-carbonate sediments of the Itataia Group. Considering the studies conducted here and available geological data, three main mineralizing events can be identified in Itataia: (1) an initial high temperature event connected with a sodium metasomatism-related uranium episode, taking place in Borborema Province and its African counterpart; (2) a second lower temperature stage, consisting of a multiphase cataclastic/hydrothermal event limited to fault and paleokarst zones; and (3) a third and final event, developed in frankly oxidizing conditions. The last two involving mixing of hydrothermal and meteoric fluids." @default.
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• W2364579080 date "2016-10-01" @default.
• W2364579080 modified "2023-09-25" @default.
• W2364579080 title "The Itataia phosphate-uranium deposit (Ceará, Brazil) new petrographic, geochemistry and isotope studies" @default.
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• W2364579080 cites W1970759705 @default.
• W2364579080 cites W1971788413 @default.
• W2364579080 cites W1988540193 @default.
• W2364579080 cites W1991146774 @default.
• W2364579080 cites W1991373514 @default.
• W2364579080 cites W1992587729 @default.
• W2364579080 cites W1995472076 @default.
• W2364579080 cites W1995706097 @default.
• W2364579080 cites W2002399322 @default.
• W2364579080 cites W2004427321 @default.
• W2364579080 cites W2004701115 @default.
• W2364579080 cites W2006320599 @default.
• W2364579080 cites W2009702942 @default.
• W2364579080 cites W2012332575 @default.
• W2364579080 cites W2013003698 @default.
• W2364579080 cites W2014591189 @default.
• W2364579080 cites W2014917631 @default.
• W2364579080 cites W2019665383 @default.
• W2364579080 cites W2028299312 @default.
• W2364579080 cites W2031636099 @default.
• W2364579080 cites W2032387116 @default.
• W2364579080 cites W2040377046 @default.
• W2364579080 cites W2041132999 @default.
• W2364579080 cites W2044875761 @default.
• W2364579080 cites W2045886413 @default.
• W2364579080 cites W2048072603 @default.
• W2364579080 cites W2048722474 @default.
• W2364579080 cites W2050885917 @default.
• W2364579080 cites W2051207945 @default.
• W2364579080 cites W2055083480 @default.
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• W2364579080 cites W2057935873 @default.
• W2364579080 cites W2062039471 @default.
• W2364579080 cites W2067491838 @default.
• W2364579080 cites W2073852054 @default.
• W2364579080 cites W2074572259 @default.
• W2364579080 cites W2084860511 @default.
• W2364579080 cites W2084976632 @default.
• W2364579080 cites W2088586000 @default.
• W2364579080 cites W2090406412 @default.
• W2364579080 cites W2112828658 @default.
• W2364579080 cites W2113384994 @default.
• W2364579080 cites W2118503429 @default.
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• W2364579080 cites W2129377536 @default.
• W2364579080 cites W2132916360 @default.
• W2364579080 cites W2156529959 @default.
• W2364579080 cites W2166049480 @default.
• W2364579080 cites W2167470702 @default.
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• W2364579080 cites W2313404418 @default.
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• W2364579080 doi "https://doi.org/10.1016/j.jsames.2016.05.002" @default.
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