The role of basement-involved normal faults in the recent tectonics of western Taiwan

Kenn Ming Yang, Ruey Juin Rau, Hao Yun Chang, Ching Yun Hsieh, Hsin Hsiu Ting, Shiuh Tsann Huang, Jong Chang Wu, Yi Jin Tang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In the foreland area ofwestern Taiwan, some of the pre-orogenic basement-involved normal faults were reactivated during the subsequent compressional tectonics. The main purpose of this paper is to investigate the role played by the pre-existing normal faults in the recent tectonics of western Taiwan. In NW Taiwan, reactivated normal faults with a strike-slip component have developed by linkage of reactivated single pre-existing normal faults in the foreland basin and acted as transverse structures for low-angle thrusts in the outer fold-and-thrust belt. In the later stage of their development, the transverse structures were thrusted and appear underneath the low-angle thrusts or became tear faults in the inner fold-and-thrust belt. In SW Taiwan, where the foreland basin is lacking normal fault reactivation, the pre-existing normal faults passively acted as ramp for the low-angle thrusts in the inner fold-and-thrust belt. Some of the active faults in western Taiwan may also be related to reactivated normal faults with right-lateral slip component. Some main earthquake shocks related to either strike-slip or thrust fault plane solution occurred on reactivated normal faults, implying a relationship between the pre-existing normal fault and the triggering of the recent major earthquakes. Along-strike contrast in structural style of normal fault reactivation gives rise to different characteristics of the deformation front for different parts of the foreland area in western Taiwan. Variations in the degree of normal fault reactivation also provide some insights into the way the crust embedding the pre-existing normal faults deformed in response to orogenic contraction.

Original languageEnglish
Pages (from-to)1166-1191
Number of pages26
JournalGeological Magazine
Volume153
Issue number5-6
DOIs
Publication statusPublished - 2016 Sep 1

Fingerprint

normal fault
tectonics
fold and thrust belt
reactivation
thrust
foreland basin
earthquake
thrust fault
active fault
fault plane
strike-slip fault
contraction
crust

All Science Journal Classification (ASJC) codes

  • Geology

Cite this

Yang, Kenn Ming ; Rau, Ruey Juin ; Chang, Hao Yun ; Hsieh, Ching Yun ; Ting, Hsin Hsiu ; Huang, Shiuh Tsann ; Wu, Jong Chang ; Tang, Yi Jin. / The role of basement-involved normal faults in the recent tectonics of western Taiwan. In: Geological Magazine. 2016 ; Vol. 153, No. 5-6. pp. 1166-1191.
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Yang, KM, Rau, RJ, Chang, HY, Hsieh, CY, Ting, HH, Huang, ST, Wu, JC & Tang, YJ 2016, 'The role of basement-involved normal faults in the recent tectonics of western Taiwan', Geological Magazine, vol. 153, no. 5-6, pp. 1166-1191. https://doi.org/10.1017/S0016756816000637

The role of basement-involved normal faults in the recent tectonics of western Taiwan. / Yang, Kenn Ming; Rau, Ruey Juin; Chang, Hao Yun; Hsieh, Ching Yun; Ting, Hsin Hsiu; Huang, Shiuh Tsann; Wu, Jong Chang; Tang, Yi Jin.

In: Geological Magazine, Vol. 153, No. 5-6, 01.09.2016, p. 1166-1191.

Research output: Contribution to journalArticle

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