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| Titel |
Exhumation History of the Northern Hsuehshan Range and its tectonic implication |
| VerfasserIn |
Hsin-Hsiung Wang, Yuan-Hsi Lee |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250047944
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| Zusammenfassung |
| The northern Hsuehshan Range is situated between the boundary of subduction and collision.
To the northeast, the Philippine Sea Plate is subducting northwardly beneath the Eurasian
Plate; to the south, the Eurasian Plate is colliding with the Philippine Sea Plate.
According to the oblique collision modeling, the Taiwan orogenic belt started to
build from the north and progressively propagated southward at a rate of 60-90
km/my. This model infers that the timing of mountain would be early in the northern
mountain.
In this study we used fission track dating to reveal when the Hsuehshan Ranges
started to exhumation and what deformation mechanism controlled the exhumation
history.
The reset ages of apatite fission track are from 2.6±0.4 Ma to 1.2±0.3 Ma and ages
decreases from west to east that indicates increasing exhumation rate from west to
east. We considered that the variation of the exhumation rate from west to east is
controlled by geometry of the detachment with different ramp-flat structure in depth.
The oldest reset ages of apatite fission track are similar from north to south of the
Hsuehshan Range that indicates the initial timing of exhumation is similar from
north south that indicates there is no southward propagation effect to the Taiwan
Orogenic Belt. The total exhumation amount is less in the northern Hsuehshan
Range that could result from that the slip rate of the detachment is slow and it results
from changing the tectonic setting from collision to subduction in northern Taiwan. |
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