| Ikehata, Kei, Chida, Kohsuke, Tsunogae, Toshiaki, Bornhorst, Theodore J. (2016) HYDROTHERMAL NATIVE COPPER IN OCEAN ISLAND ALKALI BASALT FROM THE MINEOKA BELT, BOSO PENINSULA, CENTRAL JAPAN. Economic Geology, 111 (3) 783-794 doi:10.2113/econgeo.111.3.783 | Journal (article/letter/editorial) | HYDROTHERMAL NATIVE COPPER IN OCEAN ISLAND ALKALI BASALT FROM THE MINEOKA BELT, BOSO PENINSULA, CENTRAL...copper grains are found in aphyric amygdaloidal basalt of early Miocene age (ca. 20 Ma) in the southern...host rock of the Mineoka native copper is alkali basalt of oceanic island affinity. Native copper is well...tholeiitic basalts, and continental tholeiitic basalt, but this is the first detailed description of...of an occurrence in ocean island alkali basalt. Introduction Copper commonly occurs as sulfide and oxide |
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