New magnetic anomaly map of the east asia with some preliminary tectonic interpretations

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Title:	New magnetic anomaly map of the east asia with some preliminary tectonic interpretations
Authors:	杜文斌;Doo, Wen-Bin;Hsu, Shu-Kun;Armada, Leo
Contributors:	環境研究中心
Keywords:	atmospheric science;Continental shelves;Cruises;Data;Data acquisition;Fracture zones;geology;Geophysics;hydrology;Magnetic anomalies;Magnetic data;Magnetic fields;Magnetization;Ocean floor;oceanic science;Oceanic trenches;Orientation;Plateaus;Seafloor spreading;space science;Subduction (geology);Surveying
Date:	2015-01-01
Issue Date:	2026-04-23 15:02:24 (UTC+8)
Publisher:	Chinese Geoscience Union;Taiwan: Springer Nature B.V
Abstract:	摘要： Magnetic data provides basic information for geological and geophysical interpretation. In this study we compile recently collected (57 cruises survey) and old (published and open access) magnetic data. This compilation includes land, marine and aeromagnetic data acquired in the East Asia region. The newly acquired magnetic data are mainly concentrated mainly in the South China Sea (SCS) (especially in the northern continental shelf), the northwestern part of the West Philippine Basin (WPB), and the East China Sea. The updated magnetic dataset is gridded with a spacing of one arc-minute. The new mag- netic map provides new insights into the tectonic setting of East Asia. Analysis of the compiled data reveals several regional anomaly patterns: (1) the NE-SW trending high positive magnetic anomaly zone extending from southwest Taiwan to the area about 114.5°E and 22°N is pronounced; but it is less continuous southwest of the Penghu islands. In addition, the orientation of this high linear magnetic zone changes slightly in 118.5°E, 22.5°N from N60°E - N50°E. (2) Between the Gagua Ridge (GR) and the Luzon-Okinawa Fracture Zone (LOFZ) the marine magnetic stripes of the WPB exhibit a NW-SE orientation. This suggests that the seafloor spreading could be related to the first stage of the WPB east of the LOFZ. (3) The Urdaneta and Amami plateaus are associated with high magnetization zones. These high magnetization zones extend northwestward and are subducting beneath the Ryukyu Trench. 出版者： Taiwan: Springer Nature B.V 出版日期： 2015-02-01 出處： TAO : Terrestrial, atmospheric, and oceanic sciences, 2015-02, Vol.26 (1), p.73 資源來源： DOAJ (Directory of Open Access Journals) eJournal Collection 版權： 2015. This work is licensed under https://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1017-0839 識別號： ISSN: 2223-8964 識別號： ISSN: 2311-7680 識別號： EISSN: 2311-7680 識別號： DOI: 10.3319/TAO.2014.08.19.07(GRT)
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