globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2020.116241
论文题名:
Response of remanent magnetization to deformation in geological processes using 3D-printed structures
作者: Liu P.; Gervasoni S.; Madonna C.; Gu H.; Coppo A.; Pané S.; Hirt A.M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 539
语种: 英语
中文关键词: 3D printing ; inclination flattening ; palaeogeographic reconstructions ; rheology
英文关键词: Compaction ; Deformation ; Geomagnetism ; Magnetization ; Rheology ; 3-D printing ; Anhysteretic remanent magnetizations ; Correction factors ; Geological process ; inclination flattening ; Incremental compaction ; Printed structures ; Remanent magnetization ; 3D printers ; analog model ; compaction ; deformation mechanism ; magnetic inclination ; paleogeography ; paleomagnetism ; reconstruction ; remanent magnetization ; rheology
英文摘要: Palaeogeographic reconstructions and construction of apparent polar wander paths are dependent on having reliable palaeomagnetic directions. The importance of inclination flattening in biasing the palaeomagnetic record has been debated for over 60 yrs. Correction for this effect often assumes that the palaeomagnetic vector deforms as a passive line. In a novel approach using 3D printed analogue rocks, we revisit the question of how a palaeomagnetic vector responds to deformation, specifically compaction. Maghaemite nanoparticles were mixed in the printing resin with a concentration of 0.15 wt. %, and five series of cylinders with 1 cm height and diameter were printed with porosities between 0% and 20%. Samples were given an anhysteretic remanent magnetization, and were subjected subsequently to incremental compaction. The magnetic fabric shows an initially weak compaction in the printing plane that becomes larger with increased compaction. The palaeomagnetic inclination changes according to the strain that the sample undergoes, and the amount of deflection is less than predicted by a passive line model of deformation. Our results demonstrate that using a single correction factor for inclination flattening is questionable, and show the need for a method that considers how the rock deforms. Further we demonstrate the usefulness of 3D printed analogue rock, which can inspire more realistic methods to correct for inclination flattening. © 2020 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165127
Appears in Collections:气候变化与战略

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作者单位: Institute of Geophysics, ETH Zürich, Sonneggstrasse 5, Zürich, CH-8092, Switzerland; State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China; Institute of Robotics, Intelligent Systems, ETH Zürich, Sonneggstrasse 5, Zürich, CH-8092, Switzerland; Geological Institute, ETH Zürich, Sonneggstrasse 5, Zürich, CH-8092, Switzerland

Recommended Citation:
Liu P.,Gervasoni S.,Madonna C.,et al. Response of remanent magnetization to deformation in geological processes using 3D-printed structures[J]. Earth and Planetary Science Letters,2020-01-01,539
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