Publications

Biofilm on sedimentary pyrite crystals (~1 micrometer in size) from Mosomo Lake, Minnesota.

Peer review articles

2018 – present

22. McLauchlan, K. K., Lascu, I., Mellicant, E. M., Scharping, R. J., Williams, J. J., 2019, Influences of forested and grassland vegetation on Late Quaternary ecosystem development as recorded in lacustrine sediments, Quaternary Research, accepted

21. Myre, J. M., Lascu, I., Lima, E. A., Feinberg, J. M., Saar, M. O., Weiss, B. P., 2019, Using TNT-NN to unlock the fast full spatial inversion of large magnetic microscopy datasets, Earth, Planets and Space, doi:10.1186/s40623-019-0988-8

20. Lascu, I., Einsle, J. F., Ball, M. R., Harrison, R. J., 2018, The vortex state in geologic materials: A micromagnetic perspective, Journal of Geophysical Research, 123, p. 7285–7304, doi:10.1029/2018JB015909

19. Harrison, R. J., Muraszko, J. R., Heslop, D., Lascu, I., Muxworthy, A. R., Roberts, A. P., 2018, An improved algorithm for unmixing first‐order reversal curve diagrams using principal component analysis, Geochemistry Geophysics Geosystems, 19, p. 1595-1610, doi:10.1029/2018GC007511 

2016 – 2017 (Cambridge postdoc – the job market years)

18. Schiemer, J. A., Lascu, I., Harrison, R. J., Kumar, A., Katiyar, R. S., Sanchez, D. A., Ortega, N., Salazar Mejia C., Schnelle, W., Echizen, M., Shinohara, H., Heap, A. J. F., Nagaratnam, R., Dutton, S. E., Scott, J. F., Nair, B., Mathur, N. D., Carpenter, M. A., 2017, Elastic and anelastic relaxation behaviour of perovskite multiferroics II: PbZr0.53Ti0.47O3 (PZT) – PbFe0.5Ta0.5O3 (PFT), Journal of Materials Science, 52, p. 285-304, doi: 10.1007/s10853-016-0330-9

17. Lascu, I., Feinberg, J. M., Dorale, J. A., Cheng, H. and Edwards, R. L., 2016, Age of the Laschamp excursion determined by U-Th dating of a speleothem geomagnetic record from North America, Geology 44, p. 139-142, doi:10.1130/G37490.1toll-free full text

16. Channell, J. E. T., Harrison, R. J., Lascu, I., McCave, I. N., Hibbert, F. D. and Austin, W. E. N., 2016, Magnetic record of deglaciation using FORC-PCA, sortable-silt grain size, and magnetic excursion at 26 ka, from the Rockall Trough (NE Atlantic), Geochemistry Geophysics Geosystems 17, p. 18231841, doi: 10.1002/2016GC006300NanoPaleoMag news post

15. Schiemer, J. A., Lascu, I., Harrison, R. J., Kumar, A., Katiyar, R. S., Sanchez, D. A., Ortega, N., Salazar Mejia C., Schnelle, W., Echizen, M., Shinohara, H., Heap, A. J. F., Nagaratnam, R., Dutton, S. E., Scott, J. F. and Carpenter, M. A., 2016, Elastic and anelastic relaxation behaviour of perovskite multiferroics I: PbZr0.53Ti0.47O3 (PZT) – PbFe0.5Nb0.5O3 (PFN), Journal of Materials Science 51, p. 10727-10760, doi: 10.1007/s10853-016-0280-2

2014 – 2015 (Cambridge postdoc – the glory years)

14. Lascu, I., Harrison, R. J., Li, Y. T., Muraszko, J. R., Channell, J. E. T., Piotrowsky, A. M. and Hodell, D. A., 2015, Magnetic unmixing of first-order reversal curve diagrams using principal component analysis, Geochemistry, Geophysics, Geosystems 16, p. 2900-2915, doi:10.1002/2015GC005909software

13. Carpenter, M. A., Schiemer, J. A., Lascu, I., Harrison, R. J., Kumar, A., Katiyar, R. S., Ortega, N., Salazar Mejia C., Schnelle, W., Echizen, M., Shinohara, H., Heap, A. J. F., Nagaratnam, R., Dutton, S. E. and Scott, J. F., 2015, Elastic and magnetoelastic relaxation behaviour of multiferroic (ferromagnetic + ferroelectric + ferroelastic), Pb(Fe0.5Nb0.5)O3 perovskite, Journal of Physics: Condensed Matter 27, 285901, doi:10.1088/0953-8984/27/28/285901

12. Williams, J. J., McLauchlan, K. K., Mueller, J. R., Mellicant, E. M., Myrbo, A. E. and  Lascu, I.,  2015, Ecosystem development following deglaciation: a new sedimentary record from Devils Lake, Wisconsin, USA, Quaternary Science Reviews 125, p. 131-143, doi:10.1016/j.quascirev.2015.08.009

11. Lascu, I., Wohlfarth, B., Onac, B. P., Björck, S. and Kromer, B.,  2014, A Late Glacial paleolake record from an up-dammed river valley in northern Transylvania, Romania, Quaternary International 388, p. 87-96, doi:10.1016/j.quaint.2014.11.041

10. Harrison, R. J. and Lascu, I., 2014, FORCulator: A micromagnetic tool for simulating first-order reversal curve diagrams, Geochemistry, Geophysics, Geosystems 15, p. 4671-4691, doi:10.1002/2014GC005582software

9. Blumentritt, D. J. and Lascu, I., 2014, A comparison of magnetic susceptibility measurement techniques and ferrimagnetic component analysis from recent sediments in Lake Pepin (USA), Geological Society, London, Special Publications 414, p. 197-207, doi:10.1144/SP414.6

2012 – 2013 (Minnesota postdoc and dissertation mop-up)

8. Lascu, I. and Plank, C. P., 2013, A new dimension to sediment magnetism: Charting the spatial variability of magnetic properties across lake basins, Global and Planetary Change 110, p. 340-349, doi:10.1016/j.gloplacha.2013.03.013

7. McLauchlan, K. K., Lascu, I., Myrbo, A. and Leavitt, P. R., 2013, Variable ecosystem response to climate change during the Holocene in northern Minnesota, U.S.A., Geological Society of America Bulletin 125, p. 445-452, doi:10.1130/B30737.1

6. Strauss, B. E., Strehlau, J. H., Lascu, I., Dorale, J. A., Penn, R. L. and Feinberg, J. M., 2013, The origin of magnetic remanence in stalagmites: Observations from electron microscopy and rock magnetism, Geochemistry, Geophysics, Geosystems 14, p. 50065025, doi:10.1002/2013GC004950

5. Lascu, I., McLauchlan, K., Myrbo, A., Leavitt, P. R. and Banerjee, S. K., 2012, Sediment-magnetic evidence for last millennium drought conditions at the prairie–forest ecotone of northern United States, Palaeogeography, Palaeoclimatology, Palaeoecology 337-338, p. 99-107, doi:10.1016/j.palaeo.2012.04.001

2007 – 2011 (Grad school publications)

4. Lascu, I. and Feinberg, J. M., 2011, Speleothem magnetism, Quaternary Science Reviews 30, p. 3306-3320, doi:10.1016/j.quascirev.2011.08.004

3. Lascu, I., Banerjee, S. K. and Berquó, T. S., 2010, Quantifying the concentration of ferrimagnetic particles in sediments using rock-magnetic methods, Geochemistry, Geophysics, Geosystems 11, Q08Z19, doi:10.1029/2010GC003182

2. Jackson, M. J., Bowles, J., Lascu, I. and Solheid, P., 2010, Deconvolution of u-channel magnetometer data: Experimental study of accuracy, resolution and stability of different inversion methods, Geochemistry, Geophysics, Geosystems 11, Q07Y10, doi:10.1029/2009GC002991

1. Labourdette, R., Lascu, I., Mylroie, J. E. and Roth, M. J., 2007, Process-like modeling of flank margin caves: From genesis to burial evolution, Journal of Sedimentary Research 77, p. 965-979, doi:10.2110/jsr.2007.086

Invited lectures and conference presentations

2018

Into the vortex: Unlocking geologic mysteries using nano-scale tomography and magnetism, Lascu, I., Department of Geology and Geophysics, University of Utah, Salt Lake City, USA, 18 October.

Biogeomagnetism: Learning about the history of Earth and life from the magnetism of natural materials, Lascu, I., Natural History Research Experiences Seminar, Smithsonian Institution, Washington, D.C., USA, 13 July.

Hunting for magnetofossils in the Precambrian: Were magnetotactic bacteria the first biomineralizers around? Lascu, I., Institute for Rock Magnetism Visiting Fellowship Seminar, University of Minnesota, Minneapolis, USA, 8 March.

2017

Modeling first-order reversal curves, Lascu, I., Harrison, R. J., and Muraszko, J. R., International Conference on Rock Magnetism, Utrecht University, Utrecht, The Netherlands, 10-14 July.

Pseudo single domain remanence carriers in obsidian revealed by rock magnetism, electron microscopy nanotomography and micromagnetic modeling, Lascu, I., Ball, M., Einsle, J. F. and Harrison, R. J., JpGU-AGU Joint Meeting, Chiba, Japan, 20-25 May.

Iron biomineralization by bacteria: A magnetic trek from lakes on Earth to life on Mars, Lascu, I., Smithsonian National Museum of Natural History, Washington, D.C., USA, 14 February.

2016

Research strategies and quantitative methods in environmental magnetism, Lascu, I., Muraszko, J. R., Harrison, R. J. and McLauchlan, K. K., AGU Fall Meeting, San Francisco, USA, 12-16 December.

Processing large FORC diagram datasets applied to Earth-Science research, Lascu, I., Harrison, R. J. and Muraszko, J. R., Second annual first-order reversal curve (FORC) workshop, New Orleans, USA, 30 October.

The magnetism of speleothems: Applications in environmental and geomagnetic studies, Lascu, I., Institut de Physique du Globe, Paris, France, 11 March.

Magnetic sediments: A window into past global change, Lascu, I., Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, USA, 16 February.

Unmixing magnetic domain states in natural and synthetic samples, Lascu, I., Harrison, R. J. and Muraszko, J. R., Magnetic Interactions Conference, Imperial College, London, UK, 7-8 January.

2015

Unmixing multi-component magnetic mixtures in geologic materials using first-order reversal curve diagrams, Lascu, I., Harrison, R. J., Li, Y. T., Muraszko, J. R., Channell, J. E. T., Piotrowsky, A. M., Hodell, D. A., Necula, C. and Panaiotu, C., AGU Fall Meeting, San Francisco, USA, 14-18 December.

Magnetic unmixing of first-order reversal curve diagrams using principal component analysis, Lascu, I., Harrison, R. J., Li, Y. T., Muraszko, J. R., Channell, J. E. T., Piotrowsky, A. M. and Hodell, D. A., European Geosciences Union General Assembly, Vienna, Austria, 12-17 April.

Other recent conference presentations

2018

The vortex state in magnetic minerals revealed by FIB nanotomography and micromagnetic modeling, Lascu, I., Einsle J. F., Ball, M. and Harrison, R. J., AGU Fall Meeting, Washington, D.C., USA, 10-14 December.

Uncovering the origin of magnetism in Early Proterozoic rocks from Lake Superior: A false positive test for magnetofossils, Curry, D., Lascu, I. and Fu, R. R., AGU Fall Meeting, Washington, D.C., USA, 10-14 December.

A micromagnetic perspective on the vortex state in Earth and planetary materials, Lascu, I., Harrison, R. J., Einsle J. F. and Ball, M., Goldschmidt Conference, Boston, USA, 12-17 August.

2017

Pseudo single domain remanence carriers in obsidian revealed by rock magnetism, electron microscopy nanotomography and micromagnetic modelling, Lascu, I., Ball, M., Einsle J. F. and Harrison, R. J, Magnetic Interactions Conference, University of Edinburgh, Edinburgh, UK, 5-6 January.

2016

What does it mean to be pseudo single domain? Demystifying the PSD state, Lascu, I., Harrison, R. J., Einsle J. F. and Ball, M., AGU Fall Meeting, San Francisco, USA, 12-16 December.

Refining the Quaternary Geomagnetic Instability Time Scale: The Laschamp Excursion dated from a speleothem record, Lascu, I., PAGES Central and Eastern Europe Paleoscience Symposium: From Local to Global, Cluj-Napoca, Romania, 23-24 May.

2015

Dating the Laschamp Excursion: Why speleothems are valuable tools for constraining the timing and duration of short-lived geomagnetic events, Lascu, I., Feinberg, J. M., Dorale, J. A., Cheng, H. and Edwards, R. L., AGU Fall Meeting, San Francisco, USA, 14-18 December. 

High-resolution magnetic imaging of geologic samples using scanning magnetic tunnel junction microscopy, Lascu, I., Magnetic Interactions Conference, University of Leeds, Leeds, UK, 7-8 January. 

2014

Scanning magnetic tunnel junction (MTJ) microscopy: High-resolution magnetic imaging of geologic samples, Lascu, I. and Harrison, R. J., American Geophysical Union Fall Meeting, San Francisco, California, USA, 15-19 December. 

Speleothems as geomagnetic recorders, Magnetic Interactions Conference, Lascu, I., University of Cambridge, Cambridge, UK, 8-9 January. 

2013

Toward constraining the age and duration of the Laschamp geomagnetic excursion using a speleothem record from Crevice Cave, Missouri, Lascu, I., Feinberg, J. M., Dorale, J. A., Edwards, R. L. and Cheng, H., Geological Society of America Abstracts with Programs. Vol. 45, No. 7. 

Non peer review articles

Lascu, I., Jackson, M. J. and Solheid, P., 2012, Beyond u-channels: Improving the deconvolution of u-channel magnetometer data for non-standard sample geometries, IRM Quarterly, 22 (3). article

Citations and other metrics