Crustal deformation and block kinematics in transition from collision to subduction

Global positioning system measurements in northern Taiwan, 1995-2005

Ruey-Juin Rau, Kuo-En Ching, Jyr Ching Hu, Jian Cheng Lee

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

We present global positioning system (GPS) measurements for the period 1995-2005 at 125 campaign-surveyed sites in northern Taiwan. Based on elastic, rotating block modeling analyses derived from the GPS data, we describe the transitional tectonics from arc-continent (Luzon-Chinese) collision to the converging Ryukyu trench subduction and back-arc opening along the Chinese continental margin. Station velocities relative to station S01R, in the Chinese stable continental margin, were estimated from coordinate time series of each station by using the weighted least squares technique. We found two distinct deformation patterns in two geological areas, which are basically separated by the surface projection of the NW-trending boundary of the subducting Philippine Sea plate across northern Taiwan: (1) a waning collision area to the west and (2) a transition zone to the east. In the waning collision area, the horizontal velocity field shows vectors of 0.3-7.3 mm/yr toward the NW in the foothills and the Hsuehshan Range of northwestern Taiwan. The tectonic blocks represent a significant NW-SE internal contraction along with a small block rotation rate (<3.0°/Myr). The transition zone can be further divided into an outer range and inner range with distinguishing rotation rates and deformation behaviors. In the outer range of the transition zone, velocities of 1.0-7.8 mm/yr from south to north rotating from 008° to 143° is found in the northernmost foothills and the Hsuehshan Range. The tectonic blocks within the outer range are characterized by a coherent rotation (low internal strain rate of <0.10 μstrain/yr) with an angular velocity of ∼5.1°/Myr, where the Euler pole is located near its southeastern boundary. In the inner range of transition zone, a larger clockwise rotation from west to east, with horizontal velocities of 9.3-41.2 mm/yr from 053° to 146°, are found in the northernmost Central Range. The tectonic blocks of the inner range reveal a remarkable NW-SE internal extension with an ultrarapid clockwise rotation (∼47.3°/Myr) where the Euler pole is near the southern boundary of the range close to the collision corner with the colliding Luzon arc. The trench roll-back together with back-arc opening are interpreted to be substantially superposed on the arc-continent collision-induced rotation in the transition zone with particular regard to the inner range of the northeast Taiwan mountain belt.

Original languageEnglish
Article numberB09404
JournalJournal of Geophysical Research: Solid Earth
Volume113
Issue number9
DOIs
Publication statusPublished - 2008 Sep 4

Fingerprint

Global Positioning System
crustal deformation
Taiwan
transition zone
Global positioning system
Kinematics
kinematics
subduction
GPS
collision
Tectonics
collisions
tectonics
arcs
trench
continental margin
stations
Poles
continental shelves
continents

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geophysics
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

@article{d4089014752841f695ef172fb07fea61,
title = "Crustal deformation and block kinematics in transition from collision to subduction: Global positioning system measurements in northern Taiwan, 1995-2005",
abstract = "We present global positioning system (GPS) measurements for the period 1995-2005 at 125 campaign-surveyed sites in northern Taiwan. Based on elastic, rotating block modeling analyses derived from the GPS data, we describe the transitional tectonics from arc-continent (Luzon-Chinese) collision to the converging Ryukyu trench subduction and back-arc opening along the Chinese continental margin. Station velocities relative to station S01R, in the Chinese stable continental margin, were estimated from coordinate time series of each station by using the weighted least squares technique. We found two distinct deformation patterns in two geological areas, which are basically separated by the surface projection of the NW-trending boundary of the subducting Philippine Sea plate across northern Taiwan: (1) a waning collision area to the west and (2) a transition zone to the east. In the waning collision area, the horizontal velocity field shows vectors of 0.3-7.3 mm/yr toward the NW in the foothills and the Hsuehshan Range of northwestern Taiwan. The tectonic blocks represent a significant NW-SE internal contraction along with a small block rotation rate (<3.0°/Myr). The transition zone can be further divided into an outer range and inner range with distinguishing rotation rates and deformation behaviors. In the outer range of the transition zone, velocities of 1.0-7.8 mm/yr from south to north rotating from 008° to 143° is found in the northernmost foothills and the Hsuehshan Range. The tectonic blocks within the outer range are characterized by a coherent rotation (low internal strain rate of <0.10 μstrain/yr) with an angular velocity of ∼5.1°/Myr, where the Euler pole is located near its southeastern boundary. In the inner range of transition zone, a larger clockwise rotation from west to east, with horizontal velocities of 9.3-41.2 mm/yr from 053° to 146°, are found in the northernmost Central Range. The tectonic blocks of the inner range reveal a remarkable NW-SE internal extension with an ultrarapid clockwise rotation (∼47.3°/Myr) where the Euler pole is near the southern boundary of the range close to the collision corner with the colliding Luzon arc. The trench roll-back together with back-arc opening are interpreted to be substantially superposed on the arc-continent collision-induced rotation in the transition zone with particular regard to the inner range of the northeast Taiwan mountain belt.",
author = "Ruey-Juin Rau and Kuo-En Ching and Hu, {Jyr Ching} and Lee, {Jian Cheng}",
year = "2008",
month = "9",
day = "4",
doi = "10.1029/2007JB005414",
language = "English",
volume = "113",
journal = "Journal of Geophysical Research",
issn = "0148-0227",
publisher = "American Geophysical Union",
number = "9",

}

TY - JOUR

T1 - Crustal deformation and block kinematics in transition from collision to subduction

T2 - Global positioning system measurements in northern Taiwan, 1995-2005

AU - Rau, Ruey-Juin

AU - Ching, Kuo-En

AU - Hu, Jyr Ching

AU - Lee, Jian Cheng

PY - 2008/9/4

Y1 - 2008/9/4

N2 - We present global positioning system (GPS) measurements for the period 1995-2005 at 125 campaign-surveyed sites in northern Taiwan. Based on elastic, rotating block modeling analyses derived from the GPS data, we describe the transitional tectonics from arc-continent (Luzon-Chinese) collision to the converging Ryukyu trench subduction and back-arc opening along the Chinese continental margin. Station velocities relative to station S01R, in the Chinese stable continental margin, were estimated from coordinate time series of each station by using the weighted least squares technique. We found two distinct deformation patterns in two geological areas, which are basically separated by the surface projection of the NW-trending boundary of the subducting Philippine Sea plate across northern Taiwan: (1) a waning collision area to the west and (2) a transition zone to the east. In the waning collision area, the horizontal velocity field shows vectors of 0.3-7.3 mm/yr toward the NW in the foothills and the Hsuehshan Range of northwestern Taiwan. The tectonic blocks represent a significant NW-SE internal contraction along with a small block rotation rate (<3.0°/Myr). The transition zone can be further divided into an outer range and inner range with distinguishing rotation rates and deformation behaviors. In the outer range of the transition zone, velocities of 1.0-7.8 mm/yr from south to north rotating from 008° to 143° is found in the northernmost foothills and the Hsuehshan Range. The tectonic blocks within the outer range are characterized by a coherent rotation (low internal strain rate of <0.10 μstrain/yr) with an angular velocity of ∼5.1°/Myr, where the Euler pole is located near its southeastern boundary. In the inner range of transition zone, a larger clockwise rotation from west to east, with horizontal velocities of 9.3-41.2 mm/yr from 053° to 146°, are found in the northernmost Central Range. The tectonic blocks of the inner range reveal a remarkable NW-SE internal extension with an ultrarapid clockwise rotation (∼47.3°/Myr) where the Euler pole is near the southern boundary of the range close to the collision corner with the colliding Luzon arc. The trench roll-back together with back-arc opening are interpreted to be substantially superposed on the arc-continent collision-induced rotation in the transition zone with particular regard to the inner range of the northeast Taiwan mountain belt.

AB - We present global positioning system (GPS) measurements for the period 1995-2005 at 125 campaign-surveyed sites in northern Taiwan. Based on elastic, rotating block modeling analyses derived from the GPS data, we describe the transitional tectonics from arc-continent (Luzon-Chinese) collision to the converging Ryukyu trench subduction and back-arc opening along the Chinese continental margin. Station velocities relative to station S01R, in the Chinese stable continental margin, were estimated from coordinate time series of each station by using the weighted least squares technique. We found two distinct deformation patterns in two geological areas, which are basically separated by the surface projection of the NW-trending boundary of the subducting Philippine Sea plate across northern Taiwan: (1) a waning collision area to the west and (2) a transition zone to the east. In the waning collision area, the horizontal velocity field shows vectors of 0.3-7.3 mm/yr toward the NW in the foothills and the Hsuehshan Range of northwestern Taiwan. The tectonic blocks represent a significant NW-SE internal contraction along with a small block rotation rate (<3.0°/Myr). The transition zone can be further divided into an outer range and inner range with distinguishing rotation rates and deformation behaviors. In the outer range of the transition zone, velocities of 1.0-7.8 mm/yr from south to north rotating from 008° to 143° is found in the northernmost foothills and the Hsuehshan Range. The tectonic blocks within the outer range are characterized by a coherent rotation (low internal strain rate of <0.10 μstrain/yr) with an angular velocity of ∼5.1°/Myr, where the Euler pole is located near its southeastern boundary. In the inner range of transition zone, a larger clockwise rotation from west to east, with horizontal velocities of 9.3-41.2 mm/yr from 053° to 146°, are found in the northernmost Central Range. The tectonic blocks of the inner range reveal a remarkable NW-SE internal extension with an ultrarapid clockwise rotation (∼47.3°/Myr) where the Euler pole is near the southern boundary of the range close to the collision corner with the colliding Luzon arc. The trench roll-back together with back-arc opening are interpreted to be substantially superposed on the arc-continent collision-induced rotation in the transition zone with particular regard to the inner range of the northeast Taiwan mountain belt.

UR - http://www.scopus.com/inward/record.url?scp=56449120641&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56449120641&partnerID=8YFLogxK

U2 - 10.1029/2007JB005414

DO - 10.1029/2007JB005414

M3 - Article

VL - 113

JO - Journal of Geophysical Research

JF - Journal of Geophysical Research

SN - 0148-0227

IS - 9

M1 - B09404

ER -