NSFGEO-NERC: Transforming understanding of paleomagnetic recording: Insights from experimental observations and numerical predictions

NSFGEO-NERC：转变对古地磁记录的理解：实验观察和数值预测的见解

• 批准号: NE/S011978/1
• 负责人: Wyn Williams
• 金额: $ 22.1万
• 依托单位: University of Edinburgh
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FS011978%2F1
• 关键词: NSFGEO; NERC; Transforming; understanding; paleomagnetic

Our understanding of the way in which rocks record the geomagnetic field is based on an analyticaltheory which makes the assumption that particles are uniformly magnetized (i.e., they are single domain,SD). But, it has long been known that most rocks contain grains referred to as pseudo-single-domain(PSD); these are too big to be uniformly magnetized, and are unsuited for analytical theory.Recent breakthroughs in numerical modeling have opened new avenues for understanding the nature ofPSD grains. Making it possible to estimate the temporal and thermal stability of PSD particles. Thisapproach has gained new urgency given recent results on PSD samples which call into question theirreliability for paleointensity research. The opportunity now exists to combine experimental and numericalapproaches for a radical new understanding of paleomagnetic recording, with the potential to transformhow paleointensity research is done.

我们对岩石记录地磁场的方式的理解是基于一种分析理论，该理论假设粒子是均匀磁化的（即，它们是单畴的，SD）。但是，人们早就知道，大多数岩石含有被称为伪单畴（PSD）的颗粒；它们太大了，不能均匀磁化，也不适合分析理论。数值模拟的最新突破为理解psd颗粒的性质开辟了新的途径。使估计PSD粒子的时间和热稳定性成为可能。鉴于最近对PSD样品的结果，这种方法获得了新的紧迫性，这些结果对它们在古强度研究中的可靠性提出了质疑。现在有机会将实验和数值方法结合起来，对古地磁记录有一个全新的认识，有可能改变古地磁强度研究的方式。

项目成果

Clay minerals and continental-scale remagnetisation: a case study of South American Neoproterozoic carbonates

粘土矿物和大陆规模的再磁化：南美新元古代碳酸盐岩的案例研究

• DOI: 10.22541/essoar.170365187.73154915/v1
• 发表时间: 2023
• 作者: Bellon U

Area law for magnetic domain walls in bent cylindrical nanowires

• DOI: 10.1103/physrevb.106.094410
• 发表时间: 2022-09
• 期刊: Physical Review B
• 影响因子: 3.7
• 作者: G. Bittencourt;O. Chubykalo-Fesenko;D. Altbir;V. Carvalho-Santos;R. Moreno

Collective magnetotaxis of microbial holobionts is optimized by the three-dimensional organization and magnetic properties of ectosymbionts.

• DOI: 10.1073/pnas.2216975120
• 发表时间: 2023-03-07
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Chevrier, Daniel M.;Juhin, Amelie;Menguy, Nicolas;Bolzoni, Romain;Soto-Rodriguez, Paul E. D.;Kojadinovic-Sirinelli, Mila;Paterson, Greig A.;Belkhou, Rachid;Williams, Wyn;Skouri-Panet, Feriel;Kosta, Artemis;Le Guenno, Hugo;Pereiro, Eva;Faivre, Damien;Benzerara, Karim;Monteil, Caroline L.;Lefevre, Christopher T.
• 通讯作者: Lefevre, Christopher T.

Unmixing of magnetic hysteresis loops through a modified Gamma-Cauchy exponential model

通过改进的伽玛-柯西指数模型分离磁滞回线

• DOI: 10.22541/essoar.168500308.80861228/v1
• 发表时间: 2023
• 作者: Bellon U

From Disorder to Order: Inheritance of Magnetic Remanence in Tetrataenite-Bearing Meteorites From Multi-Phase Micromagnetic Modeling

从无序到有序：多相微磁模型中含辉长岩陨石中剩磁的继承

• DOI: 10.22541/essoar.170365210.02652655/v1
• 发表时间: 2023
• 作者: Devienne J