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The Northeast Japan arc hosts a number of hydrothermal vein‐type copper deposits associated with Neogene felsic intrusions. The Arakawa area is underlain by Cretaceous granites and Tertiary sedimentary rocks, which were intruded by the Miocene Ushizawamata dacite. Zircon grains from the dacite intrusion yield a 206Pb/238U intercept age (laser ablation inductively coupled plasma mass spectrometry)...
There are a number of epithermal Au‐Ag deposits in the Tohoku region of the Northeast Japan arc; however, these deposits have undergone limited exploration for over the past seven decades. This reconnaissance research study of the Bosawa deposit in Akita Prefecture was conducted to support future gold exploration in the Tohoku region. The Bosawa deposit is a vein‐type Au‐Ag deposit, with a production...
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