Crustal analysis of maud rise from combined satellite and near-surface magnetic survey data
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- Kim Hyung Rae
- Goddard Earth Science and Technology, University of Maryland, Baltimore County at Planetary Geodynamics Lab, NASA/GSFC
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- Frese Ralph R. B. von
- Department of Geological Sciences, The Ohio State University
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- Golynsky Alexander V.
- VNII Okeangeologia, St. Petersburg
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- Taylor Patrick T.
- Code 698, Planetary Geodynamics Lab, NASA/GSFC
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- Kim Jeong Woo
- Department of Geoinformatic Engineering, Sejong University
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説明
We produced a crustal magnetization model for the Maud Rise in the southwest Indian Ocean off the coast of East Antarctica using magnetic observations from the @/Os052/@rsted satellite and near-surface surveys complied by the Antarctic Digital Magnetic Anomaly Project (ADMAP). Joint inversion of the two anomaly fields suggests that the magnetic effects due to crustal thickness variations and remanence involving the normal polarity Cretaceous Quiet Zone (KQZ) dominate at satellite altitude (-700 km). The crustal thickness effects were modeled in the @/Os052/@rsted data using crustal thickness variations derived from satellite altitude gravity data. Modeling of the residual @/Os052/@rsted and near-surface magnetic anomalies supports extending the KQZ eastwards to the Astrid Ridge. The remaining near-surface anomalies involve crustal features with relatively high frequency effects that are strongly attenuated at satellite altitudes. The crustal modeling can be extended by the satellite magnetic anomalies across the Indian Ocean Ridge for insight on the crustal properties of the conjugate Agulhas Plateau. The modeling supports the Jurassic reconstruction of Gondwana when the African Limpopo-Zambezi and East Antarctic Princess Astrid coasts were connected as part of a relatively demagnetized crustal block.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 57 (8), 717-726, 2005
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681489534720
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- NII論文ID
- 10017469731
- 130003956531
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 7465034
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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