Home Publications Courses Research

____________________________________________________________________________

$Description: C:\C\Shahnas\FaceBook\MHFB01.jpg$

LIST OF PUBLICATIONS

Shahnas, M.H., & R.N. Pysklywec (2023), Penetrative superplumes in the mantle of large super-Earth planets:

A possible mechanism for active tectonics in the massive super-Earths, Geochemistry, Geophysics, Geosystems,

24, e2022GC010678. https://doi. org/10.1029/2022GC010678

Shahnas, M.H., & R.N. Pysklywec (2021), Focused penetrative plumes: A possible consequence of the dissociation

transition of postperovskite at ∼0.9 TPa in massive rocky super-Earths, Geochemistry, Geophysics, Geosystems,

22, e2021GC009910. https://doi.org/10.1029/2021GC009910

Shahnas, M.H., & R.N. Pysklywec (2020), Toward a Unified Model for the Thermal State of the Planetary Mantle:

Estimations From Mean Field Deep Learning, Earth and Space Science, 7, e2019EA000881.

https://doi.org/10.1029/2019EA000881

Shahnas, M.H., R.N. Pysklywec & D. A. Yuen (2018), Penetrative Convection in Super‐Earth Planets: Consequences

of MgSiO3 Postperovskite Dissociation Transition and Implications for Super‐Earth GJ 876 d, Journal of Geophysical

Research: Planets, 123. https://doi.org/10.1029/2018JE005633.

Shahnas, M.H., D. A. Yuen, & R.N. Pysklywec (2018), Inverse Problems in Geodynamics Using Machine Learning,

Journal of Geophysical Research-Solid Earth, DOI: 10.1002/2017JB014846.

Shahnas, M.H., R.N. Pysklywec, J.F. Justo, D. A. Yuen, and (2017), Spin transition-induced anomalies in the lower mantle:

implications for mid-mantle partial layering, Geophys. J. Int., 210, 765–773, doi: 10.1093/gji/ggx198.

Shahnas, M.H., D. A. Yuen, and R.N. Pysklywec (2017), Mid-mantle heterogeneities and iron spin transition in the lower

mantle: Implications for mid-mantle slab stagnation, EPSL, 458, 293-304, dx.doi.org/10.1016/j.epsl.2016.10.052.

Shahnas, M.H., R.N. Pysklywec and D.A. Yuen (2016), Spawning superplumes from the mid-mantle: the impact of spin

transitions in the mantle, Geochemistry, Geophysics, Geosystems, 17, 10.1002/2016GC006509.

Shahnas, M.H., W. R. Peltier, (2015), The impacts of mantle phase transitions and the iron spin crossover in ferropericlase

on convective mixing—is the evidence for compositional convection definitive? New results from a Yin-Yang overset grid-based

control volume model, Journal of Geophysical Research-Solid Earth, 10.1002/2015JB012064.

Shahnas, M.H., R. Pysklywec and W. R. Peltier, (2013), Layered Intra-lithospheric Small-I Scale Convection in the Ionian

Asthenosphere: Implications for Short-Range Surface Topography and Heat Flow, ICARUS, 225, 15-27.

Shahnas, M.H., W. R. Peltier, Z. Wu, and R.Wentzcovitch, (2011), The High Pressure Electronic Spin Transition in Iron:

Potential Impacts upon Mantle Mixing, Journal of Geophysical Research, Vol. 116, B08205, doi:10.1029/2010JB007965.

Shahnas, M.H. et al., (2011), The High Pressure Electronic Spin Transition in Iron:

Potential Impacts upon Mantle Mixing, Research Highlights, Nature Geoscience, Vol. 4.

Shahnas, M.H., and W. R. Peltier, (2010) Layered convection and the impacts of the perovskite-postperovskite phase

transition on mantle dynamics under isochemical conditions, Journal of Geophysical Research, Vol. 115, B11408,

doi:10.1029/2009JB007199, 2010.

Shahnas, M.H., J.P. Lowman, Gary Jarvis, and H-.P Bunge, (2008), Convection in a Spherical Shell Heated by an Isothermal Core

and Internal Sources: Implications for the Thermal State of Planetary Mantle, Physics of the Earth and Planetary Interiors

168, 6–15.

Lowman, J.P. and M.H. Shahnas, (2007), The Influence of the Lithosphere on the Core: 3D Mantle Convection Modeling on

Planetary Scales, Canadian Society for Exploration Geophysics, Vol. 32, No. 5, 25-30.

Lowman, J.P., L.T.Pinero-Feliciangeli,J.M. Kendall,and M.H. Shahnas, (2007), The influence of convergent plate boundaries

on upper mantle flow and implications for seismic anisotropy in the regions surrounding subducted slabs, Geochem. Geophys.

Geosyst., Vol. 8, No. 8, doi:10.1029/2007GC001627.

Shahnas, M.H., and Gary T. Jarvis, (2007), On the Relative Importance of Mineral Phase Transitions and Viscosity Stratification

in Controlling the Sinking Rates of Detached Slab Remnants, GRL Vol. 34, L11302, doi:10.1029/2007GL029463.

Shahnas, M.H., and Jafar Arkani-Hamed, (2007), Viscous and Impact Demagnetization of the Martian Crust,

JGR Planets Vol. 112, E02009, doi:10.1029/2005JE002424.

Shahnas, M.H., and R. Pysklywec, (2004), Anomalous topography in the western Atlantic caused by edge-driven convection,

GRL, Vol 31 L18611.

Pysklywec, R. and M.H. Shahnas, (2003), Time-dependent surface topography in a coupled crust-mantle convection model,

Geophys. J. Int. 154, 278-288.

Shahnas, M.H., and F. Taskini, (2001), Saddle Point Variational Method for Dirac Confinement, J OS, Vol. 12, No. 3, 271.

Shahnas M.H., and H. Hosseinkhani, (2000), The Spinless Salpeter Equation and Meson Dynamics, JOS, Vol. 11, No. 4, 335.

Shahnas, M.H., (1994), Charge Symmetry Breaking and Nolen-Schiffer Anomaly in Mirror Nuclei, Phys. Rev. C, 50, 2346.

Shahnas, M.H., (1993), Charge Symmetry Breaking in Nucleon-Nucleon Interactions, Doga, TR, Vol. 17, No. 12, 966.

MANUSCRIPTS IN PROGRESS

· Chen Yang (Bobby), Shahnas, M.H., Cecilia Cordero-Oviedo, R. N. Pysklywec & Sarah A. Finkelstein, Identifying Wetland

Type from Pollen Assemblages by Supervised Classification of Biomes Using a Collection of Published Modern Pollen

· Alilie Owens, Shahnas, M.H. & R.N. Pysklywec, The Application of Generative Adversarial Networks (GAN) in Electrical

Resistivity Inversion.

· Santimano, Taska, Shahnas, M.H. , Fannie Yiu & R.N. Pysklywec, Fault Detection in Analogue Accretionary Wedges: Results

from Deep Convolutional Models

· Shahnas, M.H. & R.N. Pysklywec, Thermal State of a Planetary Mantle - Estimations from Generative Adversarial Networks (GAN)

· Shahnas, M.H. & R.N. Pysklywec, Towards Earthquake Forecasting – Estimations from Mean Field Recurrent Neural Networks.

· Shahnas, M.H. & R.N. Pysklywec, P-wave Arrival Time and Phase Determination - Estimations from Convolutional Neural

Networks.

· Shahnas, M.H. & R.N. Pysklywec, The impacts of the crustal strength variations on the dynamics of the Tibetan plateau.

CONFRENCE CONTRIBUTIONS

· Shahnas, M. H., & R..N. Pysklywec, Plate Tectonics in the Massive Rocky Super-Earth Planets: A Consequence of

Dissociation Transition of Post-Perovskite at ~0.9, (AGU Fall , 2022).

· Shahnas, M. H., & R..N. Pysklywec, Focused Penetrative Super-Plumes in the mantle of Super-Earths, (CGU, June 22, 2021).

· Shahnas, M. H., & R..N. Pysklywec, Machine Learning and Deep Learning Predictor Models in Estimation of the Thermal State

of a Planetary Mantle, AGU Fall, 2020; P004-0011).

· Shahnas, M. H., R.N. Pysklywec & D.A. Yuen, Thermal Evolution of the Planetary Interior – Impacts from Big Data, (AGU Fall, 2019;

P53A-05, Invited).

· Shahnas, M. H., R.N. Pysklywec & D.A. Yuen, Estimations for the Thermal State of the Planetary Mantle from Mean Field Deep

Learning, (AGU Fall, 2019, DI33C-0045).

· Pysklywec, R.N. & Shahnas, M.H., Earthquake Forecasting from Mean Field Recurrent Neural Networks, (AGU Fall, 2019, S52A-03).

· Tasca Santimano, Shahnas, M.H., R.N. Pysklywec & D.A. Yuen, Spin Transition at Mid-mantle and Spawning Superplumes, (AGU Fall,

2019, DI33C-0056).

· Shahnas, M. H., Machine Learning and Deep Learning in Geodynamics and Earth Sciences, ((Applications of Big Data and

High-Performance Computing in Earth Sciences - AGU Fall, 2019, SCIWS3 - Workshop).

· Janbakhsh, Payman Russell Pysklywec, & Shahnas, M.H., Earthquake Magnitude, Distance, First Motion Polarity, and Noise/Event

Determination Using AE, CNN1D, RNN Networks, (AGU Fall, 2019, S43E-0696).

· Janbakhsh, Payman Russell Pysklywec, & Shahnas, M. H., Final magnitude and source-distance estimation using Autoencoders and

Recurrent Neural Networks, (Geophysical Research Abstracts Vol. 21, EGU2019-4486-2, 2019 EGU General Assembly 2019).

· Shahnas, M. H., R.N. Pysklywec & D.A. Yuen &, Elaborating Inverse Problems in Geodynamics using Machine Learning Algorithms,

(CGU, 2018).

· Chen, Bo, Russell N. Pysklywec., Shahnas, M.H. Ebru S. Uluocak, Jianxin Liu, Dynamics of lithospheric extension and anomalous

topography in southern Tibet: A case for mantle flow driving crustal tectonics (CGU, 2018).

· Shahnas, M. H., D.A. Yuen & R.N. Pysklywec, Machine Learning and Applications in Geodynamics and Inverse Problems,

(Big Data Workshop, Wuhan, China, December 2017).

· Shahnas, M.H., D.A. Yuen and R.N. Pysklywec, Machine Learning and Inverse Problem in Geodynamics, (242503, AGU Fall

meeting, 2017).

· Pysklywec, R.N., Shahnas, M.H. and D.A. Yuen and, Deep Mantle Layering by post-Perovskite Dissociation at ~0.9 TPa in GJ876d

Super Earth, (240941, AGU Fall meeting, 2017).

· E.Sengul Uluocak, Shahnas, M.H., R.N. Pysklywec, O. Gogus and Tuna Eken, Multidimensional Mantle Convection Models in Eastern

Anatolia, the North Arabian Platform, and Caucasus Region (257366, AGU Fall meeting, 2017).

· Chen, B., Shahnas, M.H., and R.N. Pysklywec, Dynamics of Lithospheric Extension and Residual Topography in Southern Tibet,

(248237, AGU Fall meeting, 2017).

· Shahnas, M.H., R.N. Pysklywec and D.A. Yuen, The Impact of the Iron Spin transition on Seismic Signatures in Bullen's C-Layer,

(JpGU May, 2017).

· Shahnas, M.H., D.A. Yuen, R.N. Pysklywec and Maarten. V. De Hoop, Spin Transition in the Lower Mantle: Deep Learning and

Pattern Recognition of Superplumes from the Mid-mantle and Mid-mantle Slab Stagnation, (GP12A-02, AGU Fall meeting, 2016).

Shahnas, M.H., R.N. Pysklywec and D.A. Yuen, Spin Transition in the Lower Mantle Minerals: A Single Solution for Two Enigmatic

Problems-Superplumes and Mid-mantle Slab Stagnation, (DI41B-2628, AGU Fall meeting, 2016).

· Shahnas, M.H., D.A. Yuen, R.N. Pysklywec and W.R. Peltier, The impacts of mantle phase transitions and the iron spin crossover in

ferropericlase on convective mixing-is the evidence for compositional convection definitive?: New results from a Yin-Yang overset grid-based

control volume model, Central Asian Tectonics and Western Pacific Geodynamics International Conference, (Wuhan, June, 2015).

· Shahnas, M. H. and William R. Peltier, The Impact of Superplasticity on Mantle Layering and Plate Velocities,

(AGU Fall, 2012).

· Cai Durbin, M. H. Shahnas, and William R. Peltier, The Time Dependence of Dynamic Topography: Mantle Dynamic Contributions

to Local and Global Sea-Level Histories, (AGU Fall, 2012).

· Cai Durbin, M. H. Shahnas, William R. Peltier, and John H. Woodhouse, Mantle Convection Models Constrained by

Seismic Tomography, EGU2011-8312 (2011).

· Shahnas, M.H. and W.R. Peltier, Z. Wu, and R.Wentzcovitch, The High Pressure Electronic Spin Transition in Iron: Impacts

upon Mantle Mixing (AGU, Fall 2010).

· Shahnas, M.H. and W.R. Peltier, The Impact of Superplasticity and the Iron Spin Transition on Mantle Dynamics (GRC, June 2009).

· Shahnas, M.H. and W.R. Peltier, The Influence of the Perovskite-post Perovskite Phase Transition and the Spin Transition in Iron on

Layered Mantle Convection (AGU, Fall 2008).

· W.R. Peltier and M.H. Shahnas, Layered Convection in Earth's Mantle: Results from New Control Volume Based Analyses (AGU, Fall 2007).

· Jarvis, Gary, Julian P. Lowman, and M.H. Shahnas, Numerical Models of the Fate of Detached Slabs (IUGG, XXIV, July, 2007).

· Shahnas, M.H., J. Lowman, and H.P. Bunge, The Effect of Mechanical Boundary Conditions on the Secular Cooling of Planetary Mantles

(AGU Fall 2006).

· Shahnas, M.H. and J. Arkani-Hamed, Demagnetization of the Martian Crust (CGU Spring 2005).

· Pysklywec, R. and M.H. Shahnas, Anomalous Topography and Heat Flow in the Western Atlantic Caused by Small-Scale

Convection at the Passive Plate Margin (AGU Fall 2004).

· Ghods, A, M.H. Shahnas, and J. Arkani-Hamed, The formation of the lunar and Martian mascons (AGU Fall 2004).

· Shahnas, M.H. and Gary T. Jarvis, Multiphase Modeling in the Fate of Detached Slabs in the India-Asia Collision (CGU, May 2004).

· Gary T. Jarvis and M. H. Shahnas ,Thermal Signatures and Deformation of Detached Slabs in the Asia-India Collision (AGU, Fall 2003).

· Shahnas, M.H. and R. Pysklywec, Dynamic Topography on the Edge Driven Mantle Convection (AGU Fall 2003).

· Cruden, A.R., R,M, Pysklywec, M. H. Shahnas and L. Thopson, Mantle downwellings and surface topography: A comparison of simple

laboratory and numerical model experiments (CGU, May 2003).

· Shahnas, M.H. and Gary T. Jarvis, Unconstrained Mantle Convection in a Complete Cylindrical Shell (CGU, May 2003).

· Gary T. Jarvis and M. H. Shahnas ,Thermal Signatures of Detached Slabs in a Cylindrical Model of Mantle Convection (CGU, May 2003).

· Cruden, A.R. , R,M, Pysklywec, M. H. Shahnas and L. Thopson, Surface topography response due to mantle gravity instabilities:

A comparison of simple laboratory and numerical model experiments (EGS, April 2003).

· Shahnas, M.H. and R. Pysklywec, Time-dependent surface topography in a free surface crust-mantle convection model, (AGU Fall 2001).

· G.F. West and M.H. Shahnas, Time Evolution of Low Viscous Heterogeneous Medium, (AGU Fall 2000).