Unveiling Japan's geological history through volcanogenic massive sulfide deposits
Dating key tectonic events in Japan's geological history has long been often challenging due to poor microfossil preservation from intense heat due to metamorphism. Researchers tackled this by using Re--Os isotope geochronology on Besshi-type volcanogenic massive sulfide deposits (Makimine and Shimokawa deposits) associated with sediment-covered mid-ocean ridges. Their findings revealed the timing of ridge subduction -- when one tectonic plate was forced beneath another -- a process that shaped Japan's landscape and provided new insights into its geological evolution.
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Dating key tectonic events in Japan's geological history has long been often challenging due to poor microfossil preservation from intense heat due to metamorphism. Researchers tackled this by using Re--Os isotope geochronology on Besshi-type volcanogenic massive sulfide deposits (Makimine and Shimokawa deposits) associated with sediment-covered mid-ocean ridges. Their findings revealed the timing of ridge subduction -- when one tectonic plate was forced beneath another -- a process that shaped Japan's landscape and provided new insights into its geological evolution.
