Welcome to Andrea Regina Biedermann's Research Page

I have been fascinated by minerals and rocks for as long as I can remember. When I was a little girl, I smuggled tons of them into my dad’s backpack during family hikes. A few years later, and after having studied geophysics, I am now privileged to work with minerals or rocks on a daily basis – be it during field work or in the lab.

My research uses a variety of magnetic and other methods to better understand geologic processes on our planet. A large part of my work deals with the characterization of mineral or material magnetic properties (e.g. ability to carry magnetization, anisotropy), mineral identification, and using magnetic proxies as efficient tools to describe e.g. mineral fabrics, or environmental conditions. I passionately teach geophysics, rock and paleomagnetism.

 

Interested? Want to collaborate?

Join me and discover more on these pages. Or send a message to: andrea (dot) regina (dot) biedermann (at) gmail (dot) com

 

 

News

Presentations at the 12th IRM Conference on Rock Magnetism (online, June 2021):

  • Biedermann, A.R. (Invited): Characterizing anisotropy of ferromagnetic grains: methods and challenges
  • Biedermann, A.R.: What we need to know when interpreting magnetic pore fabrics
  • Zamanialavijeh, N., Ferré, E.C., Hacker, D.B., Biederman, A.R., Biek, R.F.: Magnetic fabric and kinematics of frictional melts: Example from the Markagunt gravity slide, southwest Utah

 

Presentations at the 2021 virtual EGU General Assembly

  • Ali, A., Biedermann, A.R., Berg, J., Lever, M., Vogel, H.: Environmental magnetism study of Lake Cadagno, Switzerland
  • Biedermann, A.R., Zhou, Y., Pugnetti, M.: Finding explanations for the large variability in empirical relationships between magnetic pore fabrics and pore space properties
  • Pugnetti, M., Zhou, Y., Biedermann, A.R.: Experimental improvements for ferrofluid impregnation of rocks using directional forced impregnation methods: results on natural and synthetic samples
  • Zhou, Y., Pugnetti, M., Foubert, A., Lanari, P., Neururer, C., Biedermann, A.R.: Correlations of magnetic pore fabrics with pore fabrics derived from high-resolution X-ray computed tomography and with permeability anisotropy in sedimentary rocks and synthetic samples

 

Congratulations to Erik Poloni for the publication of his paper 'Tough metal-ceramic composites with multifunctional nacre-like architecture' >>

 

New paper on modelling shape and distribution anisotropy >>  The code is open-source and freely available here >>

 

Presentations at the 2020 online AGU Fall Meeting:

  • Biedermann, A.R., Pugnetti, M., Zhou, Y.: Towards a quantitative interpretation of magnetic pore fabrics
  • Pugnetti, M., Zhou, Y., Biedermann, A.R.: Testing ferrofluid impregnation efficiency in artificial samples and transparent polymers with magnetic and optical methods: Implications for magnetic pore fabric studies
  • Zhou, Y., Pugnetti, M., Foubert, A., Neururer, C., Biedermann, A.R.: Quantitative comparison of magnetic pore fabric and pore fabric characterization based on high-resolution X-ray computed tomography in synthetic samples and sedimentary rocks

 

Invited review on 'Current challenges and future developments in magnetic fabric research' is published in Tectonophysics >>

 

Our study on complex non-second-order tensor anisotropy due to needle-shaped magnetite exsolutions is now published: Biedermann, A.R., Jackson, M., Chadima, M., Hirt, A.M., and Feinberg, J.M., Beyond the second order magnetic anisotropy tensor: Higher-order components due to oriented magnetite exsolutions in pyroxenes, and implications for paleomagnetic and structural interpretations >> (free access with this link)

 

Presentations at the 2020 EGU Sharing Geoscience Online conference:

  • Biedermann, A.R.: Shape and distribution anisotropy of irregular arrangements of diverse bodies – a 3D computational model.
  • Pugnetti, M., Zhou, Y., Biedermann, A.R.: Testing the efficiency of ferrofluid impregnation in porous media - recommendations for future magnetic pore fabric studies.
  • Zhou, Y., Pugnetti, M., Foubert, A., Neururer, C., Biedermann, A.R.: Comparison of pore fabric based on high-resolution X-ray computed tomography and magnetic pore fabric in sedimentary rocks.

 

Our study on the correlation between magnetic and seismic anisotropy in the Finero peridotite is now published: Biedermann, A.R., Kunze, K., and Zappone, A.S., Crystallographic preferred orientation, magnetic and seismic anisotropy in rocks from the Finero peridotite, Ivrea-Verbano Zone, Northern Italy – interplay of anisotropy contributions from different minerals. Tectonophysics >> (free access until June 13th, 2020)

 

2 papers on partial anhysteretic remanence anisotropy are published:

  • Biedermann, A.R., Jackson, M., Stillinger, M.D., Bilardello, D., and Feinberg, J.M., Anisotropy of full and partial anhysteretic remanence across different rock types: 1. Are partial anhysteretic remanence anisotropy tensors additive? Tectonics
  • Biedermann, A.R., Jackson, M., Bilardello, D., and Feinberg, J.M., Anisotropy of full and partial anhysteretic remanence across different rock types: 2. Coercivity-dependence of remanence anisotropy. Tectonics

 

Public lecture on magnetic stripes at the ocean floor on Jan 17th, 2020 (in German) - Öffentlicher Vortrag zu magnetischen Streifen am Ozeanboden, für die Mineralien-und Fossilienfreunde Bern, am 17. Jan 2020 um 19.30 im Naturhistorischen Museum Bern: Streifenmuster am Ozeanboden: Was magnetische Mineralien über die Bewegung der Kontinente erzählen >>

 

Upcoming presentations at the AGU Fall Meeting 2019:

  • Biedermann., A.R. (Invited): Current challenges and future developments in magnetic fabric research
  • Biedermann., A.R., Pugnetti, M., Zhou, Y.: Shape and distribution anisotropy contributions to magnetic pore fabrics
  • Ferré, E.C., Biedermann., A.R., Teyssier, C.: The long alteration history of peridotites in the New Caledonia ophiolite: from ocean ridge to obduction and beyond

 

My paper on 'Magnetic pore fabrics: the role of shape and distribution anisotropy in defining the magnetic anisotropy of ferrofluid-impregnated samples' is published >>