GIST Scholar
College of Engineering
Department of Environment and Energy Engineering
1. Journal Articles
Nature and Origin of Magnetic Lineations Within Valdivia Bank: Ocean Plateau Formation by Complex Seafloor Spreading
- Type
- Article
- Citation
- GEOPHYSICAL RESEARCH LETTERS, v.50, no.13
- Issued Date
- 2023-07
- Abstract
- Valdivia Bank (VB) is a Late Cretaceous oceanic plateau formed by volcanism from the Tristan-Gough hotspot at the Mid-Atlantic Ridge (MAR). To better understand its origin and evolution, magnetic data were used to generate a magnetic anomaly grid, which was inverted to determine crustal magnetization. The magnetization model reveals quasi-linear polarity zones crossing the plateau and following expected MAR paleo-locations, implying formation by seafloor spreading over & SIM;4 Myr during the formation of anomalies C34n-C33r. Paleomagnetism and biostratigraphy data from International Ocean Discovery Program Expedition 391 confirm the magnetic interpretation. Anomaly C33r is split into two negative bands, likely by a westward ridge jump. One of these negative anomalies coincides with deep rift valleys, indicating their age and mechanism of formation. These findings imply that VB originated by seafloor spreading-type volcanism during a plate reorganization, not from a vertical stack of lava flows as expected for a large volcano.
- Publisher
- AMER GEOPHYSICAL UNION
- ISSN
- 0094-8276
- Appears in Collections:
- Department of Environment and Energy Engineering > 1. Journal Articles
- 파일 목록
-
-
Download
Geophysical Research Letters _ 2023 _ Thoram _ Nature and Origin of Magnetic Lineations Within Valdi.pdf
기타 데이터 / 3.23 MB / Adobe PDF
-
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.