Development of Studying Ultrahigh-Pressure Metamorphic Rocks from China during the Past 15 Years
中国超高压变质岩十五年研究进展

Studies on the ultra-high pressure metamorphic (UHPM) rocks from China started in 1980s. Progresses so far made in the field could be summarized as follows.① The Dabieshan-Su-Lu UHPM belt has been well-known since many new outcrops of UHPM rocks were found；② Mineralogical evidences indicate that the continental crust rocks with low density could subduct down to depth of >200 km and undergo UHPM；③ UHPM rocks from the Dabieshan-Su-Lu area were dated as early Mesozoic when the Yangtze Craton subducted northward beneath the Sino-Korean Craton； ④ Fluids were not active and oxygen isotope composition of meteoric water could be preserved during UHPM process, as is evidenced by O, C, and H isotope data； ⑤Multistage models were suggested to explain the exhumation of the UHPM terrain. Some hotly debated issues were summarized.