A5036497451- earthquake and tectonic studies
- Landslides and related hazards
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Remote Sensing and LiDAR Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Cryospheric studies and observations
- Geological Modeling and Analysis
- Seismic Waves and Analysis
- Geology and Paleoclimatology Research
- Seismology and Earthquake Studies
- 3D Surveying and Cultural Heritage
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Soil erosion and sediment transport
- Remote Sensing and Land Use
- Geological Studies and Exploration
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Fire effects on ecosystems
- Hydrology and Sediment Transport Processes
- Methane Hydrates and Related Phenomena
- Seismic Imaging and Inversion Techniques
- Crystallography and molecular interactions
Institute of Earth Sciences, Academia Sinica
2016-2025
Academia Sinica
2006-2022
National Central University
2020-2022
Centre National de la Recherche Scientifique
2009
Institut national de recherche en informatique et en automatique
2009
California Institute of Technology
2009
Université de Pau et des Pays de l'Adour
2009
University of Connecticut
1996-1999
Central Policy Unit
1994
The Taiwan mountain belt is composed of a Cenozoic slate (Hsuehshan Range units, HR, and Backbone Slates, BS) accreted polymetamorphic basement rocks (Tananao Complex, TC). Ongoing crustal shortening has resulted from the collision between Chinese continental margin Luzon volcanic arc, which initiated ∼6.5 Ma ago. grade age metamorphism exhumation are key record development orogenic wedge. Because mostly by sediments lacking metamorphic index minerals, quantitative constraints on sparse. By...
We combine light detection and ranging (LiDAR) digital terrain model (DTM) data an improved mesh implementation to investigate the effects of highresolution surface topography on seismic ground motion based upon spectralelement method.In general, increases amplitude shaking at mountain tops ridges, whereas valleys usually have reduced motion, as has been observed in both records from past earthquakes numerical simulations.However, realistic not often clearly characterized simulations,...
In this study, six different periods of digital terrain model (DTM) data obtained from various flight vehicles by using the techniques aerial photogrammetry, airborne LiDAR (ALS), and unmanned (UAV) were adopted to discuss errors applications these techniques. Error estimation provides critical information for DTM users. This study conducted error perspective general users mountain/forest areas with poor traffic accessibility limited information, including reports generation process...
Research Article| March 01, 1996 Synorogenic extension and exhumation of the Taiwan hinterland Jean M. Crespi; Crespi 1Department Geology Geophysics, University Connecticut, 354 Mansfield Road, Storrs, Connecticut 06269-2045 Search for other works by this author on: GSW Google Scholar Yu-Chang Chan; Chan Michael S. Swaim Author Article Information Publisher: Geological Society America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print 0091-7613 (1996) 24 (3): 247–250....
Taiwan's Hsüehshan range experienced penetrative coaxial deformation within and near the brittle‐plastic transition between ∼6.5 3 Ma. This recent short‐lasting in an active, well‐studied orogen makes it ideal natural laboratory for studying crustal rheology. Recrystallized grain size piezometry quartz Ti‐in‐quartz thermobarometry yield peak differential stresses of ∼200 MPa at 250–300°C that taper off to ∼80 ∼350°C ∼14 ∼400–500°C. Stress results do not vary with lithology: recrystallized...
Abstract. The accuracy, reliability and best practises of Ti-in-quartz thermobarometry (TitaniQ) in greenschist facies rocks have not been established. To address these issues, we measured Ti concentrations rutile-bearing samples moderately deformed, partially recrystallized quartzite vein quartz from the Hsüehshan range, Taiwan. spread grains correlates with grain size. Recrystallized (grain size ~100–200 μm) that formed during early deformation within biotite stability field shows a marked...
Abstract Studying slow-moving, deep-seated landslides is crucial due to their long-lasting effects on landscapes, infrastructure, and communities. In mountainous regions like Taiwan, understanding these vital for hazard mitigation land-use planning. Over 2500 pre-existing have been cataloged in Taiwan using LiDAR data, with many identified as potential slow-moving landslide zones, including a significant site, the Liugui-D047, near Hsinfa Village southern Taiwan. This study aims understand...
In this study, we conduct a multi-disciplinary including geophysics, geochemistry, and geology, with help of tens previously drilled exploration wells, to reconstruct geothermal geological models at the shallow 3-5 km, for project in Tatun volcano area, northern Taiwan. Our reconstructed profiles show that volcanoes have ~1-2-km thick lava flows pyroclastic deposits, erupted on top 6-8-km-thick fold-and-thrust belt Miocene sedimentary rocks. The seismic velocity imaging indicates likely main...
Taiwan's Tatun Volcanic Group (TVG) is an active tectonic zone that moved from compression zones to crustal expansion. It a graben, or region of thinning structure, favorable magmatic intrusion. This geologic context supplies heat for the formation geothermal and volcanic systems. In addition, TVG suitable location exploration because numerous surface thermal characteristics associated with young rocks. By computing radiative loss based on land temperature (LST) obtained sensors...
Taiwan's geological setting, characterized by rapid tectonic uplift and among the world's most intense precipitation patterns recurring extreme rainfall events, offers a natural laboratory for studying sediment flux erosion rates in mountain river basins. The availability of open-source satellite-derived digital elevation models (DEMs) provides an invaluable opportunity to evaluate their suitability constraining these dynamic environments. Laonong River, one prominent vulnerable watersheds,...
A prominent tectonic feature in northeastern Taiwan, the Ilan Plain, has played a critical role structural evolution of Oligocene and Miocene strata during opening Okinawa Trough. Despite its significance, geological map around this region remains unclear, particularly regarding how backarc extension later stages Taiwan orogeny affected faulting folding these strata. Dense vegetation posed significant challenges to field-based investigations, limiting our understanding region’s...
The thermo-tectonic history of an orogenic belt can be investigated using data on metamorphic grade, thermochronology, and structural geology. However, in the strongly deformed poorly exposed terrains, field observation correlation present challenges that hinder construction large-scale frameworks. Previous studies demonstrate LiDAR-based digital elevation model (LiDAR DEM) reveals geomorphic lineaments caused by interactions between planar geological structures surface processes....
The geological units of Taiwan are traditionally classified into five from east to west: the Coastal Range, Backbone Hsuehshan Range (HR), Western Foothills (WF), and Plain. While boundaries between these tectonic generally associated with major faults, some remain inadequately defined poorly understood. One notable example is boundary WF HR, which has historically been identified as Chuchih Fault. However, biochronological research suggests that Fault does not coincide Paleogene Neogene...
Abstract The Taiwan orogen has been the focus of a number models mountain building processes, but little attention paid to high‐pressure (HP) metamorphic rocks that are found as exotic blocks intermingled within deepest units belt. In this study, we re‐appraise from updated petrological and thermodynamic databases physical conditions HP metamorphism in Taiwan, combine our findings with available geochronological data estimate thermal history these rocks. Our results indicate peak ∼550 °C...
Abstract. Several remote sensing techniques, namely traditional aerial photographs, an unmanned aircraft system (UAS), and airborne lidar, were used in this study to decipher the morphological features of obscure landslides volcanic regions how observed may be for understanding landslide occurrence potential hazard. A reconstruction method was proposed assess morphology based on dome-shaped topography edifice nature its evolution. Two large-scale Tatun volcano group northern Taiwan targeted...
Rapid urbanization and population growth in Hanoi city raise the demand for groundwater risk of land subsidence. This study is first to conduct a long-term interferometric synthetic aperture radar (InSAR) analysis with different SAR sensors including ALOS, COSMO-SkyMed Sentinel-1 evaluate spatiotemporal evolution subsidence between 2007 2018. The results show that Central had been diminishing during these 12 years, while southern western outskirts (Ha Dong Hoai Duc district) become hot spots...
The Pakuashan anticline is an active fault tip fold that constitutes the frontal most zone of deformation along western piedmont Taiwan Range. Assessing seismic hazards associated with this and its contribution to crustal shortening across central requires some understanding structure growth rate. To address this, we surveyed geometry several deformed strata geomorphic surfaces, which recorded different cumulative amounts shortening. These units were dated ages ranging from ∼19 ka ∼340 using...