由綜合岩石歷史解密造山運動：拉曼分析為基礎之地質溫壓計結合地質年代學(1/3)

Rock history of the sedimentary cover wrapping the subducted oceanic and continental margin basement is crucial to unravel the architecture and evolution of resultant orogenic belts, while that of the oceanic and continental basement is key to illuminate the oceanic to continental subduction processes which brought in the subsequent collision. This proposal intends to integrate the RSCM (raman spectroscopy of carbonaceous material) geothermometer for maximum T in meta-sediments and QuiG (quartz-in-garnet) geobarometer for pressure estimates in suitable medium-high grade metamorphic rocks, along with in-situ laser microprobe 40Ar/39Ar dating of syn-kinematic mineral growths. Such comprehensive approach will quantitatively resolve the growth mechanism and structural evolution of the current mountain building system of Taiwan, including vital and debated issues on extent of oceanic and continental subduction, detachment fault geometry, significance of basal accretion, and rock exhumation processes; where meta-sediment rock cycles are well-established with sufficient field structural data, LiDAR-derived high-resolution topographic models may assist advanced detailed geologic mapping in areas of important structures. The techniques and knowledge from Taiwan orogen will be applied to major East Asia mountain belts, and preliminary investigations are planned for a large active orogenic system – eastern margin of Tibetan Plateau, and an ancient orogen – the NW Vietnam region. 3 years of research work is devised for field and lab analysis in areas along the Lishan Fault, northernmost and eastern and southern parts of the slate terrane, the eastern part of the Tananao Complex including both Tailuko and Yuli belts; field and lab analyses in the East Asia comparative studies will be carried out in parallel.