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      Release of uranium from highly radiogenic zircon through metamictization: The source of orogenic uranium ores

      , , , , , ,
      Geology
      Geological Society of America

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          Residence of REE, Y, Th and U in Granites and Crustal Protoliths; Implications for the Chemistry of Crustal Melts

          F Bea (1996)
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            Copper systematics in arc magmas and implications for crust-mantle differentiation.

            Arc magmas are important building blocks of the continental crust. Because many arc lavas are oxidized, continent formation is thought to be associated with oxidizing conditions. On the basis of copper's (Cu's) affinity for reduced sulfur phases, we tracked the redox state of arc magmas from mantle source to emplacement in the crust. Primary arc and mid-ocean ridge basalts have identical Cu contents, indicating that the redox states of primitive arc magmas are indistinguishable from that of mid-ocean ridge basalts. During magmatic differentiation, the Cu content of most arc magmas decreases markedly because of sulfide segregation. Because a similar depletion in Cu characterizes global continental crust, the formation of sulfide-bearing cumulates under reducing conditions may be a critical step in continent formation.
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              Radiation damage in zircon and monazite

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                Author and article information

                Journal
                Geology
                Geology
                Geological Society of America
                0091-7613
                1943-2682
                December 23 2015
                January 2016
                January 2016
                November 11 2015
                : 44
                : 1
                : 15-18
                Article
                10.1130/G37238.1
                8a3c85c3-50f5-4681-9b18-d51dcf0fb96b
                © 2015
                History

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