Volcanic-associated Besshi-type copper sulfide deposits |
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| Authors: | A L Dergatchev N I Eremin N E Sergeeva |
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| Institution: | 1.Moscow State University,Moscow,Russia |
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| Abstract: | Besshi-type volcanic-associated massive sulfide deposits (VMSD) are associated with undifferentiated basaltic formations.
They form within the mid-ocean ridges near the continental margins, in back-arc spreading zones, and rarely in intracontinental
rift basins. They are characterized by a wide spread of turbidites in ore-bearing strata, Co-rich copper-zinc ores, the predominance
of subvolcanic sills, sheet-like ore bodies, an absence of clear structural control, relatively low Cu, Zn, Ag, and Au grades,
enrichment in Pb, and relatively large ore and metal reserves. |
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