Ashio Mine, Tochigi

Where: Tochigi · Asia · approx. 36.64, 139.44 (vicinity only)

Why this spot: Hydrothermal Cu-polymetallic veins

What turns up: Quartz, chalcopyrite, sphalerite, calcite; historic copper mine

Access: Prohibited / view only.

Closed mine and pollution-remediation area; no collecting

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.