Search results for: Yue-Gau Chen

Items from 1 to 20 out of 67 results

article

Improved analytical techniques of sulfur isotopic composition in nanomole quantities by MC-ICP-MS

Tsai-Luen Yu, Bo-Shian Wang, Chuan-Chou Shen, Pei-Ling Wang, more

Analytica Chimica Acta > 2017 > 988 > C > 34-40

We propose an improved method for precise sulfur isotopic measurements by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS) in conjunction with a membrane desolvation nebulization system. The problems of sulfur loss through the membrane desolvation apparatus are carefully quantified and resolved. The method overcomes low intrinsic sulfur transmission through the instrument,...

article

Erosion rates across space and timescales from a multi-proxy study of rivers of eastern Taiwan

Maria Giuditta Fellin, Chia-Yu Chen, Sean D. Willett, Marcus Christl, more

Global and Planetary Change > 2017 > 157 > C > 174-193

We derive erosion rates from detrital zircon fission-track ages and cosmogenic nuclide concentrations from sediments from the modern rivers of eastern Taiwan in order to investigate how surface erosional processes vary in space and time across the young arc-continent collisional orogen of Taiwan. Taiwan is characterized by rapid rates of exhumation, a fluvial and landslide-dominated landscape, high...

article

Reconstructing surface ocean circulation with 129I time series records from corals

Ching-Chih Chang, George S. Burr, A.J. Timothy Jull, Joellen L. Russell, more

Journal of Environmental Radioactivity > 2016 > 165 > C > 144-150

The long-lived radionuclide ¹²⁹I (half-life: 15.7 × 10⁶ yr) is well-known as a useful environmental tracer. At present, the global ¹²⁹I in surface water is about 1–2 orders of magnitude higher than pre-1960 levels. Since the 1990s, anthropogenic ¹²⁹I produced from industrial nuclear fuels reprocessing plants has been the primary source of ¹²⁹I in marine surface waters of the Atlantic and around the...

article

Luminescence characteristics of quartz from Hsuehshan Range (Central Taiwan) and implications for thermochronometry

Tzu-Shuan Wu, Mayank Jain, Benny Guralnik, Andrew S. Murray, more

Radiation Measurements > 2015 > 81 > Complete > 104-109

The mountain building processes in Taiwan are currently among the most rapid in the world. However, the spatial and temporal dynamics of this orogen are still poorly resolved within the <0.5 Ma timescale, reflecting methodological gaps in addressing young and rapid bedrock cooling by erosion. Optically Stimulated Luminescence (OSL) from quartz is an emerging thermochronometer that could potentially...

article

Geochemical effects of biomass burning and land degradation on Lanyu Islet, Taiwan

Tsai–Luen Yu, Bo–Shian Wang, Chen–Feng You, George S. Burr, more

Limnology and Oceanography > 60 > 2 > 411 - 418

Reconstructed coral skeletal Pb : Ca and Ba : Ca ratios from the Northern Coast of Lanyu Islet are shown to be sensitive indicators of land–use practices which took place on the islet during the past 30 years. Coral skeletal Pb : Ca and Ba : Ca both increased dramatically. Pb : Ca ratios are very sensitive to biomass burning on Lanyu Islet while Ba : Ca generally respond to rainfall variations except...

article

Paleohydrological changes in northeastern Taiwan over the past 2ky inferred from biological proxies in the sediment record of a floodplain lake

Tien-Nan Yang, Teh-Quei Lee, Meng-Yang Lee, Chih-An Huh, more

Palaeogeography, Palaeoclimatology, Palaeoecology > 2014 > 410 > Complete > 401-411

Taiwan is particularly sensitive to changes in monsoonal precipitation and to the frequency of typhoon-induced heavy precipitation events. Many parts of this mountainous subtropical island have high erosion rates that produce high sedimentation rates in lakes and offshore ocean basins, and evidence suggests that these rates have varied in the past. A high-resolution 2ky record of changes in sediment...

article

Late Pleistocene sedimentary history of multiple glacially dammed lake episodes along the Yarlung-Tsangpo river, southeast Tibet

Shao-Yi Huang, Yue-Gau Chen, George S. Burr, Manoj K. Jaiswal, more

Quaternary Research > 2014 > 82 > 2 > 430-440

We present a reconstructed lithologic column compiled from a series of lacustrine outcrops along a tributary of the Nyang River, a major tributary of the Yarlung-Tsangpo in southeast Tibet. The deposits were preserved between terraces at altitudes of 2950–3100m asl. The stratigraphic record features at least two sets of coarsening-upward sequences depicting episodic aggradation and progradation of...

article

Optically stimulated luminescence dating of young fluvial deposits of the Middle Elbe River Flood Plains using different age models

Alexander Kunz, Dorthe Pflanz, Tobias Weniger, Brigitte Urban, more

Geochronometria > 2014 > 41 > 1 > 36-56

In the last few decades optically stimulated luminescence (OSL) dating has become an important tool in geochronological studies. The great advantage of the method, i.e. dating the depositional age of sediments directly, can be impaired by incomplete bleaching of grains. This can result in a scattered distribution of equivalent doses (D_E), leading to incorrect estimation of the depositional age. Thoroughly...

article

Estimation of rupture processes of the 2008 Wenchuan Earthquake from joint analyses of two regional seismic arrays

Bor-Shouh Huang, Jiu-Hui Chen, Qi-Yuan Liu, Yue-Gau Chen, more

Tectonophysics > 2012 > 578 > Complete > 87-97

We estimated the source rupture of the 2008 Wenchuan Earthquake (Ms 8), China, based on a back-projection of seismic waves to their source plane, using data from regional broadband arrays in Taiwan and northern Vietnam. Observations from these arrays, located at different azimuths, were processed to evaluate the spatio-temporal rupture behavior of the fault. The seismic energy spot converted from...

article

Pliocene-to-present morphotectonics of the Dien Bien Phu fault in northwest Vietnam

Kuang-Yin Lai, Yue-Gau Chen, Doãn Đình Lâm

Geomorphology > 2012 > 173-174 > Complete > 52-68

The north- to northeast-trending Dien Bien Phu fault (DBPF) zone appears to the south of the Red River fault (RRF) zone, sharing the spatial alignment of the Xianshuihe–Xiaojiang fault (XXF) and extending over a distance of 150km from Yunnan, China, through northwest Vietnam into Laos. Although the DBPF is one of the most conspicuous active fault systems in Indochina, it is less studied than the RRF...

article

The seismic velocity and attenuation structure beneath the Tatun volcanic area, Taiwan

Strong Wen, Yi-Zen Chang, Chau-Huei Chen, Yue-Gau Chen, more

Journal of Asian Earth Sciences > 2012 > 54-55 > Complete > 182-191

We have investigated the structure beneath the Tatun volcanic zone north of Taipei metropolitan area of Taiwan, area of five million people. We used the data collected from a seismic network deployed for 5years over the volcanic zone. This plus another data from Taiwan regional networks allow us to carry out tomographic inversions for V _p , V _p /V _s and Q _p structures...

article

A feasibility study on the application of luminescence dating for quartz from different rock types as a thermochronometer

Tzu-Shuan Wu, Alexander Kunz, Manoj K. Jaiswal, Yue-Gau Chen

Quaternary Geochronology > 2012 > 10 > Complete > 340-344

Thermal ages (e.g. fission track, Ar/Ar and U–Th/He ages) are important to understand mountain building activities within the upper crust. In order to understand the uplift history of Taiwan, researchers are looking for the applicability of thermal ages from fairly low cooling temperatures by using luminescence dating methods. The low-temperature-involved recent past is an area of great interest....

article

Late pleistocene evolution of Lake Manas in western China with constraints of OSL ages of lacustrine sediments

Anchuan Fan, Sheng-Hua Li, Yue-Gau Chen

Quaternary Geochronology > 2012 > 10 > Complete > 143-149

Lake Manas, located in northwestern China, has been formed in a structure depression since early Quaternary. Optically stimulated luminescence (OSL) dating is applied to the lacustrine and aeolian deposits collected from the lake to construct a chronological frame for lake level fluctuations since the last inter-glacial period. The results yielded two stages of high lake stands (∼20 m above the present...

article

Late Cenozoic metamorphism and mountain building in Taiwan: A review

Martine Simoes, Olivier Beyssac, Yue-Gau Chen

Journal of Asian Earth Sciences > 2012 > 46 > Complete > 92-119

The orogenic wedge of Taiwan results from the late Miocene collision of the Chinese passive margin and the Luzon volcanic arc. Because of the southward propagation of the collision over time, and because of its extreme rates of deformation and erosion, it has appeared as an ideal place to investigate mountain building processes. Here, we review existing metamorphic and thermochronological data on...

article

Ontogenetic vertical migration of grenadiers revealed by otolith microstructures and stable isotopic composition

Hsien-Yung Lin, Jen-Chieh Shiao, Yue-Gau Chen, Yoshiyuki Iizuka

Deep-Sea Research Part I > 2012 > 61 > Complete > 123-130

Otolith δ ¹⁸ O and δ ¹³ C of six species grenadiers were analyzed to reconstruct the historical residing depths and metabolic activity. During the larval to juvenile stage, Spicomacrurus kuronumai, Hymenocephalus lethonemus, and Bathygadus nipponicus gradually migrated from the mixed layer to the thermocline downward over a vertical distance >140m after which they moved within a...

article

Variations in monsoonal rainfall over the last 21 kyr inferred from sedimentary organic matter in Tung-Yuan Pond, southern Taiwan

Tien-Nan Yang, Teh-Quei Lee, Philip A. Meyers, Sheng-Rong Song, more

Quaternary Science Reviews > 2011 > 30 > 23-24 > 3413-3422

Changes in paleorainfall intensity linked to the strength of the East Asian (EA) summer monsoon since 21cal kyr BP are inferred from the organic matter contents of a 15-m sediment core from Tung-Yuan Pond in southern Taiwan. High total organic carbon/total nitrogen (TOC/TN) values in association with increased TOC content suggest that more soil-derived material containing terrestrial organic matter...

article

Variations of methane induced pyrite formation in the accretionary wedge sediments offshore southwestern Taiwan

Yee Cheng Lim, Saulwood Lin, Tsanyao Frank Yang, Yue-Gau Chen, more

Marine and Petroleum Geology > 2011 > 28 > 10 > 1829-1837

The accretionary wedge of offshore southwestern Taiwan contains abundant deposits of gas hydrate beneath the sea floor. High concentrations of methane in pore waters are observed at several locations with little data concerning historical methane venting available. To understand temporal variation of methane venting in sediments over geologic time, a 23-m-long Calypso piston core (MD05-2911) was collected...

article

Groundwater–seawater interactions off the coast of southern Taiwan: Evidence from environmental isotopes

In-Tian Lin, Chung-Ho Wang, Saulwood Lin, Yue-Gau Chen

Journal of Asian Earth Sciences > 2011 > 41 > 3 > 250-262

We have conducted detailed hydrochemical surveys off the Pingtung Plain coast, SW Taiwan, using environmental isotope compositions (δD, δ ¹⁸ O, δ ¹³ C _DIC , tritium, and Δ ¹⁴ C) as the main tracers to investigate groundwater–seawater interactions in the region.The δ ¹⁸ O values of seawater in this area show significant variability with heavy isotope enrichment...

article

Prolonged seismically induced erosion and the mass balance of a large earthquake

Niels Hovius, Patrick Meunier, Ching-Weei Lin, Hongey Chen, more

Earth and Planetary Science Letters > 2011 > 304 > 3-4 > 347-355

Large earthquakes deform the Earth's surface and drive topographic growth in the frontal zones of mountain belts. They also induce widespread mass wasting, reducing relief. The sum of these two opposing effects is unknown. Using a time series of landslide maps and suspended sediment transport data, we show that the M _W 7.6 Chi-Chi earthquake in Taiwan was followed by a period of enhanced mass...

article

The effect of typhoon induced rainfall on settling fluxes of particles and organic carbon in Yuanyang Lake, subtropical Taiwan

Tien-Nan Yang, Teh-Quei Lee, Philip A. Meyers, Cheng-Wei Fan, more

Journal of Asian Earth Sciences > 2011 > 40 > 6 > 1171-1179

A sediment-trap monitoring program measured the fluxes of settling particles and organic carbon in Yuanyang Lake, northern Taiwan, from July 2004 to July 2006 and assessed their relations to the amounts of normal monthly and typhoon-event precipitation. The flux of settling particles varied from 0.7mgcm ⁻² month ⁻¹ to 14.7mgcm ⁻² month ⁻¹ , and the monthly precipitation...

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Search results for: Yue-Gau Chen

Improved analytical techniques of sulfur isotopic composition in nanomole quantities by MC-ICP-MS

Erosion rates across space and timescales from a multi-proxy study of rivers of eastern Taiwan

Reconstructing surface ocean circulation with 129I time series records from corals

Luminescence characteristics of quartz from Hsuehshan Range (Central Taiwan) and implications for thermochronometry

Geochemical effects of biomass burning and land degradation on Lanyu Islet, Taiwan

Paleohydrological changes in northeastern Taiwan over the past 2ky inferred from biological proxies in the sediment record of a floodplain lake

Late Pleistocene sedimentary history of multiple glacially dammed lake episodes along the Yarlung-Tsangpo river, southeast Tibet

Optically stimulated luminescence dating of young fluvial deposits of the Middle Elbe River Flood Plains using different age models

Estimation of rupture processes of the 2008 Wenchuan Earthquake from joint analyses of two regional seismic arrays

Pliocene-to-present morphotectonics of the Dien Bien Phu fault in northwest Vietnam

The seismic velocity and attenuation structure beneath the Tatun volcanic area, Taiwan

A feasibility study on the application of luminescence dating for quartz from different rock types as a thermochronometer

Late pleistocene evolution of Lake Manas in western China with constraints of OSL ages of lacustrine sediments

Late Cenozoic metamorphism and mountain building in Taiwan: A review

Ontogenetic vertical migration of grenadiers revealed by otolith microstructures and stable isotopic composition

Variations in monsoonal rainfall over the last 21 kyr inferred from sedimentary organic matter in Tung-Yuan Pond, southern Taiwan

Variations of methane induced pyrite formation in the accretionary wedge sediments offshore southwestern Taiwan

Groundwater–seawater interactions off the coast of southern Taiwan: Evidence from environmental isotopes

Prolonged seismically induced erosion and the mass balance of a large earthquake

The effect of typhoon induced rainfall on settling fluxes of particles and organic carbon in Yuanyang Lake, subtropical Taiwan

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