Magnetic anomaly lineations in the Northeastern South China Sea and their implications for initial seafloor spreading
نویسندگان
چکیده
Ridge jumps occurred during the spreading process of South China Sea. Recent research on lower crustal reflectors event seismic profiles found at least two southward ridge jumps, but only one has been confirmed by geomagnetic data. Based magnetic anomalies in northern Sea and “two jumps” model, this study identified that an early jump anomaly C10n (28.3 Ma), with a 20 km. According to lineation distribution Sea, initial was dominated local punctiform break-up oldest anomaly, C12n (∼30.8 appeared turns COB. In IODP Expedition 367&368 drilling area, continuity from A C enhanced gradually, representing transition magmatism before final stable igneous oceanic crust. The earliest seafloor Northwestern Sub-basin is Ma) corresponding fossil C10r (∼29 Ma). average half-spreading rate ∼27.2 mm/yr. opening appears have rotated around fixed point west, fault eastern end formed trajectory conjugate moving spreading.
منابع مشابه
Updated Interpretation of Magnetic Anomalies and Seafloor Spreading Stages in the South China Sea : Implications for the Tertiary Tectonics of Southeast Asia
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ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2023
ISSN: ['2296-6463']
DOI: https://doi.org/10.3389/feart.2022.1015856