A thermomechanical wedge model of Taiwan constrained by fission-track thermochronometry

Fuller, C. W.; Willett, Sean D.; Fisher, Donald M.; Chang-yi, LU

doi:10.1016/j.tecto.2006.05.018

Cited by 123 publications

(189 citation statements)

References 59 publications

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“…[14] Erosion rates in active fold and thrust belts vary from <1 mm/a (e.g., eastern Southern Alps, New Zealand [Hicks et al, 1996]; Antiplano, Bolivia [Ege et al, 2007;Safran et al, 2006]; and European Alps [Bernet et al, 2001]) to >5 mm/a (e.g., Alpine Fault, New Zealand [Hovius et al, 1997], and eastern Taiwan [Galewsky et al, 2006]; Fuller et al, 2006;Dadson et al, 2003]) and in extreme cases >10 mm/a (St Elias Mountains, Alaska [Spotila et al, 2004;Berger and Spotila, 2008]). Erosion is often asymmetric and for our models we use a generic scheme that seeks to mimic the asymmetric exhumation of many two-sided orogens, such as the Southern Alps of New Zealand [Hicks et al, 1996;Hovius et al, 1997], central Taiwan [Liu et al, 2001;Galewsky et al, 2006;Fuller et al, 2006], the St Elias Mountains [Sheaf et al, 2003;Spotila et al, 2004], and the Andes [Masek et al, 1994;Ege et al, 2007;Safran et al, 2006].…”

Section: Erosional Boundary Conditionsmentioning

confidence: 99%

“…Erosion is often asymmetric and for our models we use a generic scheme that seeks to mimic the asymmetric exhumation of many two-sided orogens, such as the Southern Alps of New Zealand [Hicks et al, 1996;Hovius et al, 1997], central Taiwan [Liu et al, 2001;Galewsky et al, 2006;Fuller et al, 2006], the St Elias Mountains [Sheaf et al, 2003;Spotila et al, 2004], and the Andes [Masek et al, 1994;Ege et al, 2007;Safran et al, 2006].…”

Section: Erosional Boundary Conditionsmentioning

confidence: 99%

“…Taiwan lies in the path of strong typhoons, averaging four per year, has a subtropical climate and a mean precipitation of 2.5 m/a [Wu and Kuo, 1999]. High rainfall and relief, easily eroded sediments or their weakly metamorphosed equivalents all contribute to high erosion rates recorded in Taiwan [e.g., Willett et al, 2003;Dadson et al, 2003;Fuller et al, 2006].…”

Section: The Puli Embayment Taiwan: An Example?mentioning

confidence: 99%

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Three‐dimensional numerical models with varied material properties and erosion rates: Implications for the mechanics and kinematics of compressive wedges

2009

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[1] We develop three-dimensional mechanical models of a compressive wedge and investigate how the form and kinematics of the outboard wedge are affected by variation in initial topography, material properties, and erosion rate. Inclusion into the wedge of weaker, less dense material affects the form of the wedge, producing a region of steeper average slopes and higher topography while depriving the region further inboard of material. Enhanced erosion has a similar effect. The wedge attempts to replace the eroded material by focusing deformation. The result is a stepped region of lower topography within the outboard of the orogen. We observe that uplift velocities at three points in the orogen vary cyclically from near zero to $3 times the average uplift rate over cycles lasting on the order of 15-200,000 model years. Our models, along with analog models and some well-dated examples from active orogens, suggest that transient accommodation of strain may be common. The cycles observed responded rapidly to changes in the amount of erosion imposed. Our models suggest that orogens may be driven by strong coupling between erosion and strain on temporal scales of 10 4 -10 5 years and spatial scales comparable to the scale of the erosional perturbation. We compare our models to the Puli Embayment of west central Taiwan, a region of anomalous low topography and suggest that it presence may reflect the presence of weaker and more erodible sediments than those present along strike in the orogen.Citation: Upton, P., K. Mueller, and Y.-G. Chen (2009), Three-dimensional numerical models with varied material properties and erosion rates: Implications for the mechanics and kinematics of compressive wedges,

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Section: Erosional Boundary Conditionsmentioning

confidence: 99%

Section: Erosional Boundary Conditionsmentioning

confidence: 99%

Section: The Puli Embayment Taiwan: An Example?mentioning

confidence: 99%

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Three‐dimensional numerical models with varied material properties and erosion rates: Implications for the mechanics and kinematics of compressive wedges

2009

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“…The silica heat flows are estimated between 120 -190 mW m -2 and increase from the advanced to initial arc-continent collision zones. In addition, the zircon and apatite fission track dating display partial annealing and total reset zones in Southern Taiwan (Fuller et al 2006). According to the fission track partial and total reset zones, cooling (the tectonic zones of advance and initial arc-continent collision) and accretionary ages (accretionary wedge deformation zone) (Huang et al 2000;Fuller et al 2006) can be distinguished.…”

Section: The Silica Heat Flow Map Variation and Its Interpretationmentioning

confidence: 99%

“…In addition, the zircon and apatite fission track dating display partial annealing and total reset zones in Southern Taiwan (Fuller et al 2006). According to the fission track partial and total reset zones, cooling (the tectonic zones of advance and initial arc-continent collision) and accretionary ages (accretionary wedge deformation zone) (Huang et al 2000;Fuller et al 2006) can be distinguished. The estimated geothermal gradient values are about 55, 71, and 39°C km -1 in the advanced, initial arc-continent collision, and accretionary wedge deformation tectonic zones using the silica heat flow, respectively.…”

Section: The Silica Heat Flow Map Variation and Its Interpretationmentioning

confidence: 99%

Silica Geothermometry Applications in the Taiwan Orogenic Belt

Liu¹,

Song²,

Kuo³

2015

Terr. Atmos. Ocean. Sci.

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The silica concentrations from 130 hot spring measurements were calculated and used to indicate the heat flow distribution in the active Taiwan orgenic belt. The heat flow spatial distribution seems to be controlled by the Taiwan arc-continent collision zone tectonic development. Two abnormally high silica heat flow regions, 160 and 190 mW m -2 , are identified in northeastern and southeastern Taiwan, respectively. In northeastern Taiwan, the Chingshui area, the data suggests that the anomalous heat flow distribution may be controlled mainly by hot fluids and faults. The highest heat flow in southeastern Taiwan may be generated by heat advection caused by a rapidly uplifting hot crust with a decreasing mature arc-continent collision zone exhumation rate. In addition, we estimated the exhumation rate in different tectonic zones in Southern Taiwan by applying fission track ages and silica heat flow values. The exhumation rates are 1.33, 1.72 -3.87, and 0.51 -1.74 mm yr -1 in the tectonic zones around Taiwan for advanced, initial arc-continent collision and accretionary wedge deformation, respectively.

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Crustal‐scale seismic profiles across the Manila subduction zone: The transition from intraoceanic subduction to incipient collision

et al. 2014

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[1] We use offshore multichannel seismic (MCS) reflection and wide-angle seismic data sets to model the velocity structure of the incipient arc-continent collision along two trench perpendicular transects in the Bashi Strait between Taiwan and Luzon. This area represents a transition from a tectonic regime dominated by subduction of oceanic crust of the South China Sea, west of the Philippines, to one dominated by subduction and eventual collision of rifted Chinese continental crust with the Luzon volcanic arc culminating in the Taiwan orogeny. The new seismic velocity models show evidence for extended to hyperextended continental crust,~10-15 km thick, subducting along the Manila trench at 20.5°N along transect T1, as well as evidence indicating that this thinned continental crust is being structurally underplated to the accretionary prism at 21.5°N along transect T2, but not along T1 to the south. Coincident MCS reflection imaging shows highly stretched and faulted crust west of the trench along both transects and what appears to be a midcrustal detachment along transect T2, a potential zone of weakness that may be exploited by accretionary processes during subduction. An additional seismic reflection transect south of T1 shows subduction of normal ocean crust at the Manila trench.

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A thermomechanical wedge model of Taiwan constrained by fission-track thermochronometry

Cited by 123 publications

References 59 publications

Three‐dimensional numerical models with varied material properties and erosion rates: Implications for the mechanics and kinematics of compressive wedges

Three‐dimensional numerical models with varied material properties and erosion rates: Implications for the mechanics and kinematics of compressive wedges

Silica Geothermometry Applications in the Taiwan Orogenic Belt

Crustal‐scale seismic profiles across the Manila subduction zone: The transition from intraoceanic subduction to incipient collision

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