Subvolcanic vein deposits

Subvolcanic vein deposits, located in Bolivia, USA, and Japan. 

The other important deposit types of the Neogene age are polymetallic (Cu, Pb, Zn, Sn, W, Au, Ag) (xenothermal or subvolcanic type deposits) vein-type deposits, hypo/mesothermal Au vein-type deposits, disseminated-type (hot spring type) Au deposits, and Hg-Sb disseminated and vein-type deposits. 

During the Miocene age, polymetallic vein-type (xenothermal-type, subvolcanic-type) and gold-quartz vein-type (mesothermal-hypothermal-type) mineralizations occurred mainly in middle to western part of Japan. They are described in section 1.6.1. In section 1.6.2, Hg and Sb vein-type deposits are described. 

Raw basalt deposits can be found in many parts of the world with varying external characteristics and mineralogical compositions. For example, the raw basalt deposits out of the tertiary era are subvolcanic rock and occur in the form of cylindrical plugs or bedded veins. 

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See also in sourсe #XX -- [ ]

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