Neogene-Quaternary eustasy and collision tectonism in western Taiwan
- National Taiwan Univ. (China)
Taiwan is an active orogen formed by the collision between the Luzon arc and the Asian continent. Thick late Cenozoic coastal to shallow marine deposits exposed in the western foothills of western Taiwan preserved the sedimentary record of both tectonic and eustatic influences. Relating to the arc-continent collision, the Oligocene-Miocene deposits can be regarded as the pre-collisional continental margin sequence and the Pliocene-Quaternary deposits as the post-collisional foreland basin sequence. Geohistory analysis shows that the rates of sediment accumulation and basin subsidence remained low during the Miocene but increased dramatically during the Pliocene-Quaternary, reflecting the effects of exacerbated loading and unroofing of the growing orogen. In spite of the intense tectonic influence, facies variations in both the continental margin sequence and the foreland basin sequence are chronostratigraphically consistent with global eustatic fluctuations. It appears that eustatic fluctuations were able to leave a distinct signature in stratigraphic records regardless of the effects of collision tectonics.
- OSTI ID:
- 7259592
- Report Number(s):
- CONF-910403--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:3; ISSN AABUD; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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