Deciphering the 3D density structure using gravity data in the Vitória-Trindade Ridge, South Atlantic-Brazil

IF 1.7 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Journal of South American Earth Sciences Pub Date : 2024-08-28 DOI:10.1016/j.jsames.2024.105117

Onofre H.D.J. das Flores , Alanna C. Dutra , Radheshyam Yadav , Eduardo R.V. Rocha-Júnior , Anderson Costa dos Santos

引用次数: 0

Abstract

The Vitória-Trindade Ridge, situated in the central South Atlantic Ocean, is the longest aseismic ridge. The ridge comprises alkaline volcanic formations, including seamounts such as Davis, Colúmbia, Congress banks, Jaseur, Montague, and Vitória. The VTR resulted from a mantle plume, making it structurally complex. A study was conducted to investigate the structure of the VTR using gravity anomalies and bathymetric data. The study revealed the 3D structure of seamounts in terms of their density, depth, and volume. The results showed that the volume of seamounts with depth of VTR ranges from 10 to 14 km. Additionally, the uneven distribution of density contrast indicates the complex structure of the VTR region.

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利用巴西南大西洋维托里亚-特林达德海脊的重力数据破译三维密度结构

维托里亚-特林达德海脊位于南大西洋中部，是最长的无地震海脊。该海脊由碱性火山岩组成，包括戴维斯、科伦比亚、国会银行、贾瑟尔、蒙塔古和维托里亚等海山。VTR 由地幔羽流形成，因此结构复杂。一项研究利用重力异常和测深数据调查了 VTR 的结构。研究从密度、深度和体积方面揭示了海山的三维结构。结果表明，海山的体积随 VTR 深度的变化范围在 10 至 14 千米之间。此外，密度对比分布不均表明 VTR 区域结构复杂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of South American Earth Sciences 地学-地球科学综合

CiteScore

3.70

自引率

22.20%

发文量

364

审稿时长

6-12 weeks

期刊介绍： Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts, within the following research fields: -Economic geology, metallogenesis and hydrocarbon genesis and reservoirs. -Geophysics, geochemistry, volcanology, igneous and metamorphic petrology. -Tectonics, neo- and seismotectonics and geodynamic modeling. -Geomorphology, geological hazards, environmental geology, climate change in America and Antarctica, and soil research. -Stratigraphy, sedimentology, structure and basin evolution. -Paleontology, paleoecology, paleoclimatology and Quaternary geology. New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant.