https://scholars.lib.ntu.edu.tw/handle/123456789/571921
標題: | Igneous activity and structural development of the mianhua terrace, offshore North Taiwan | 作者: | Chang J.-H Yang E.Y.-C Hsu H.-H Chen T.-T Liu C.-S CHAR-SHINE LIU JIH-HSIN CHANG HO-HAN HSU |
關鍵字: | Fault; Lava; MCS; Mianhua Islet; Northern Taiwan; Sill; Volcanic edifice | 公開日期: | 2021 | 卷: | 11 | 期: | 3 | 起(迄)頁: | 1-19 | 來源出版物: | Minerals | 摘要: | Using bathymetric and multichannel seismic (MCS) data, we explored the volcanic influence on the bathymetric and stratigraphic features of the Mianhua Terrace. The Mianhua Terrace occupies the marine counterpart of the Northern Taiwan Volcanic Zone (NTVZ) along the collapsed Taiwan orogenic wedge and is dominated by post-collisional magmatism and extensional structures. The bathymetric data showed several semicircular-shaped features near the shelf break. The MCS profiles showed that the Pleistocene unconformity buried beneath the Mianhua Terrace is partly difficult to observe due to seafloor multiples, suggesting that the seafloor is dominated by physically hard lithology, probably volcanic lavas. We interpreted the high-amplitude reflectors and their projected seafloor relief as intrusive sills and associated extrusive edifice. Similarly, we interpreted high-amplitude reflectors in the vicinity of normal faults as intrusive sills emplaced and facilitated by fault structures. A volcanic or hydrothermal mound was also recognized. We propose that the Mianhua Terrace is a breached ramp in a transfer zone between the tips of two successive normal faults along the shelf break. Once the fault tips reactivate and extend toward each other, the Mianhua Terrace may continue to collapse, leading to catastrophic volcanic or associated hydrothermal events. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85102495576&doi=10.3390%2fmin11030303&partnerID=40&md5=4459fe5c583f0d56649c826ca8055531 https://scholars.lib.ntu.edu.tw/handle/123456789/571921 |
ISSN: | 2075163X | DOI: | 10.3390/min11030303 |
顯示於: | 海洋中心 |
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