Fast Track Proposal Final

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1. Broad Subject Area

Earth & Atmospheric Sciences

2. Specialization

Structural Geology

3. Title of the proposed project

Mantle-lithosphere mechanical interaction in the formation of large scale tectonic boundaries: an

investigation through numerical simulations

4. Name and address of the Investigator

Shamik Sarkar

Department of Geological Sciences

Jadavpur University, Kolkata - 700032

Email : [email protected],

Ph. 033-24146666 ext. 2364

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5. Detail of the proposed project to be undertaken:

Mantle-lithosphere mechanical interaction in the

formation of large scale tectonic boundaries: an

investigation through numerical simulations

Definition of problem

Using numerical methods this project aims at studying a number of geodynamic phenomena that

are yet to be investigated in detail. An outline of these issues is presented below.

An outstanding problem in plate tectonics is concerned with the subduction process of

lithospheric plates in convergent boundaries. A continuous plate is believed to be fragmented into two

pieces, where one of them subducts beneath the other. This project intends to investigate the nature of

plate deformation taking place just before the event of fragmentation. It is expected that lithospheric

plates undergo localized deformations with some specific patterns, allowing a subduction zone to initiate.

A direction of this study will aim to address a fundamental question- what are the patterns of deformation

localization in plate scale, and how they depend on geological factors, such as rheology, density

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variations etc. and dynamic conditions at the lithosphere-mantle interface. The proposed study will enable

us to develop a concrete model for the mechanics of subduction initiation.

Lithospheric slabs are mechanically stiffer than the underlying mantle. Their average viscosity

(1023 PaS) is about hundred times that of the mantle (1021 PaS). Thus, subducting slabs perturbs the

kinematic state of the ambient mantle region. The pattern of such flow perturbations depends on the

nature of slab movement. There are two issues: 1) characterizing flexural deformations versus downward

movement ratios and 2) how this slab motion influences the pattern of flow perturbation. A direction of

the proposed project will attempt to resolve this problem, considering composite density structure of

lithospheric plates (Ganguly et al. 2008). Flexural lithospheric deformations influence shallower level

geological processes, e.g. development of forebulge in front of orogens, localization of faults and

seismicity. This proposed work intends to investigate the origin of these geological phenomena in

relation to flexural deformations of subducting lithospheric slabs.

The process of subduction in nature occurs in a spherical space. However, existing models mostly

deal with Cartesian space either in three or two dimensions, giving little attention to the problem of space

accommodation in the third dimension. In this project an issue is to resolve a fundamental problem- what

is the mechanism of trench-parallel length shortening of a subducting lithospheric slab in a spherical

space. This poses another problem concerning the modification of three-dimensional plate geometry in

chemically non-equilibrium states of the slabs in the mantle.

Large-scale mantle plumes travel upward with a high velocity, and can finally hit the lithosphere.

This interaction leads to stress localization, resulting in damage of the lithospheric plate. Seismological

studies reveal that lithospheric masses can be strongly mechanically anisotropic in large scale. We do not

have much analysis showing the nature of plume-driven damages in anisotropic plates. A focus of the

proposed study will be to investigate the role of anisotropy in stress distribution in lithospheric plates

overlying plumes. As an extension of this problem, the project will attempt to address the issue of fault

developments along mid-oceanic ridges.

Origin of proposal

The principal investigator of this project proposal has been carrying out studies on subduction-

related phenomena by employing numerical models for the last couples of years. For example, his recent

work shows different patterns of flow perturbation as a function of rotational and translational motion of

subducting slabs. In the course of this study it is felt that a complete picture of the phenomenon demands

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an understanding of the process of subduction initiation. There is a large volume of work available in the

literature on subduction zones. However, they mostly describe the processes associated with a

lithospheric plate subducting beneath another plate, giving little attention to how a mechanically

continuous lithosphere can rupture into two segments along the convergent zones of convecting mantle.

The present proposal will aim to analyze the mode of deformation localization in a lithospheric plate

required for initiation of subduction zones, and physical factors controlling such deformation localization.

In a recent study it has been shown that excess overburden caused by sediment pile can develop localized

deformations under specific rheological conditions (Lavier and Steckler, 1997). However, this model

probably explains the process of subduction initiation in limited tectonic conditions. Present day

observations show oceanic trenches without any association of such huge sediment piles. Furthermore,

they often localize along the ocean-continent boundary, e.g. Andes in South America. We therefore need

to find a mechanical model which can be applied universally to natural subduction zones. Development of

this kind of model would require additional geological factors and dynamic boundary conditions. With

this backdrop, this project is proposed to investigate the pattern of possible deformation localization in

lithosphere, considering the dynamics of underlying mantle.

Understanding the process of subduction initiation provides a first hand clue to the theory of the

plate tectonics (Silver and Behn, 2008). An outstanding controversy in earth science pivots on an issue-

when did plate tectonic start to operate in the history of Earth’s evolution? In order to resolve this

question, many workers have used different cooling models, mainly aiming at generation of lithospheric

plates along divergent zones of convecting mantle. However, the history of plate tectonics must be

constrained with the timing of subduction initiation. Plate tectonics is unlikely to operate unless

subduction processes operate simultaneously. A line of studies in the proposed project will also make an

attempt for exploring the probable nature of plate consuming processes in the Archean time.

The process of lithospheric flexural deformation is a phenomenon virtually ubiquitous in all

subdction zones. Earth scientists look at the phenomenon from different direction. A group of workers

have studied the flexural deformation in order to explain several surface features, such as foreland basins,

foreland bulge in front of mountain belts, like the Himalaya (DeCelles et al, 2001). On other hand, some

workers are concerned with plate motion inside the mantle, where flexural deformation plays a crucial

role. It is now a well-established fact that the density contrast between lithospheric slab and the ambient

mantle is the prime factor controlling the flexural deformation. However, density structures of a slab are

poorly understood, and a subject of great interest in geodynamics (Ganguly et al, 2008). Preliminary

studies by the PI show that the nature of flow perturbations can change dramatically due to varying by

flexural deformations. In continuation of this study, a direction of the proposed study intends to

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investigate the process of flexural deformations in detail. Existing models take into account bending of

lithospheric plates in uniform mantle condition. The present project proposes to study the deformation

behaviour in view of varying density gradients in both subducting lithosphere and mantle.

Divergent tectonics control many geological phenomena, such as rifts and mid-oceanic ridges

(MOR). The proposed work of this project intends to deal with MOR structures. A MOR

characteristically contains transverse disruptions, which are described as transform and transcurrent

faults, a type of strike-slip faults. The origin of these transverse faults is still poorly understood. We

conducted some preliminary experiments, keeping a thin sand layer on a ductile medium. Convection-

type flow was simulated in the ductile medium. The experiments produced extensional ruptures similar to

MOR parallel to the convection axis. However, no fractures developed across the MOR. It appears that

the development of such transverse fractures involves additional physical factors, which need to be

investigated further. According to Anderson’s theory, divergent zones are likely to develop stress fields

that can form normal faults, but not strike-slip faults. There have been scanty attempts, either theoretical

or experiments on this issue. Using physical experiments, backed by numerical models, the proposed

work intends to find the conditions required for formation of transform-like transverse fractures in

divergent regimes.

There are several secondary processes that operate with primary geodynamic processes, e.g.

subduction. A lithospheric plate undergoes internal deformation due stresses acting along the transport

direction. These stresses can develop due several reasons, such flexural bending, density-controlled

stretching or contraction. A lithospheric plate can also undergo lateral deformation during its subduction,

which is not well explored. There have been some numerical studies, which are most concerned with

trench-parallel flow in the mantle. Furthermore, the studies are based on Cartesian space, where the

lateral dimension of lithospheric plates is conserved during subduction. In this proposed project we intend

to study the deformation behaviour of subducting slab in a spherical space, depicting the real case. Using

numerical models the proposed work intends to estimate the lateral stress possible in a lithospheric slab,

undergoing subduction in thermodynamically stable or unstable states.

Generation of thermal plumes is another secondary processe in the convection mantle. Hot

plumes of lesser density rise upward in the mantle of higher density, and sometimes interact with the

uppermost lithospheric layer. The lithosphere behaves like an elastic-plastic layer on the time scale of

plume emplacement. Preliminary numerical experiments show that plumes show complex internal flow.

The proposed study will attempt for analyzing the deformation of such lithospheric slab by taking into

account such internal flow.

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Research work engaged in at present

The author is engaged in analyzing mechanical disturbances in different natural systems. The natural

systems span from human body to geological earth system and the mechanical forces may be an

externally induced impact or may emanate from internal failures, which cause perceptible damages. The

mode of analyses carried out by the author is majorly numerical model technique, but physical

experiments were done sometimes as well.

The PI has done his PhD (2002-2006) in biomechanics by modeling of human head under dynamic

impact conditions. Short term impact forces, caused by traffic/domestic accidents induce mechanical

vibration in skull-brain complex and render traumatic injuries in brain tissues. A four-parameter (spring-

dashpot) visco-elastic material model has been employed to represent brain tissue response under impact

from different directions. Numerical model of structurally realistic skull-brain complex has been created

utilizing CT scan data of human head, and impact situations have been simulated through dynamic Finite

Element codes.

The PI was engaged in Post Doctoral work in Jadavpur University (2006-2007) dealing with strain

localization in viscoelastic rock. The PI also got involved in numerical modeling of deformation analysis

of large scale mountain belts, stress distribution around a fluid mass injecting into a viscoelastic medium,

and deformation of viscoelastic layers embedded in another viscoelastic layer and the phenomenon of

plume growth using computational fluid dynamics. These works helped to make an understanding of the

large scale geological system and mechanical disturbances upon earth.

The PI continued Post Doctoral research in IISER-Kolkata (2007 onward) in Collaboration with

Prof. Nibir Mandal. During this research, perturbation in mantle around a subducting lithospheric slab has

been modeled and studied. Density differential in both lithosphere and surrounding mantle affects the

mantle flow dynamics, which has been studied thoroughly. The initiation of ocean-continent subduction

of lithospheric plate is being modeled keeping isostacy in mind. The author is studying the deformation

localization in coulomb layer and its implication on thrust formation in mountain belts. This author has

also numerically modeled ferroelectric domain formation applying external field as boundary condition,

during this post doctoral work. At present PI is working with the Geodynamic group at Jadavpur

University.

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Recent Publication :

Kumar N., Sarkar S. and N. Mandal (2010) Numerical Modeling of Flow Patterns around Subducting

Slabs in a Viscoelastic Medium and its Implications in the Lithospheric Stress Analysis. Journal of the

Geological Society of India, vol. 75, no. 1 (Special Issue ), pp 98-110.

Nibir Mandal, Atin Kumar Mitra, Shamik Sarkar and Chandan Chakraborty, (2009) Numerical

estimation of the initial hinge-line irregularity required for the development of sheath folds: A pure shear

model, Journal of Structural Geology Volume 31, Issue 10, October 2009, Pages 1161-1173.

Manas Kumar Roy, Shamik Sarkar, and Sushanta Dattagupta (2009) Evolution of 180°, 90°, and vortex

domains in ferroelectric films Appl. Phys. Lett. 95, 192905.

M. Y. Mahmoud, A. K. Mitra, R. Dhar, S. Sarkar and N. Mandal (2007) Repeated emplacement of

syntectonic pegmatites in Precambrian Granite Gneisses: indication of pulsating brittle-ductile rheological

transitions. Published in International Conference Journal on Indian Dykes’07, BHU, Narosa Publishing

House.

Objective of the proposed project

The principal objectives of the proposed project are to investigate the following geophysical

phenomena:

1. Mechanics of subduction initiation in convergent zones, taking into account the effect of mantle-

lithosphere interaction.

2. Characterization of flow patterns around subducting slabs as a function of their kinematic and physical

properties, such density gradient.

3. Mode of lateral deformation of subducting lithosphere in spherical space with both thermodynamically

equilibrium and non-equilibrium conditions.

4. Analysis of 3D stress field across mid-oceanic ridges, and formation of ridge-parallel and –across

ruptures.

5. Patterns of lithospheric deformation due to mantle plumes, considering their internal dynamics.

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Review of R&D in the proposed area

Two broad categories of views are found in literature about the initiation of subduction, one says

that as the lithosphere ages and cools down, it becomes heavier leading to eventual collapse, triggering

subduction. A fault at the lithosphere may determine the place of failure, but the causal phenomenon is

the density difference. This spontaneous initiation of subduction theory has been challenged by arguing

that there must be contribution from the convergence phenomenon. This ‘forced’ subduction theories go

further more, arguing that an externally applied compressive stresses is also needed, and even further, by

exhibiting numerically that the subduction in ocean-continent boundary may be an outcome of external

vertical loading on lithosphere (Lavier and Steckler, 1997). However this argument cannot explain the

subduction at ocean-ocean boundaries. And the ‘forced’ subduction theories need to explain how the

external compressive stress comes into the picture. For the ‘spontaneous’ subduction, the mechanism of

collapse due to density difference is put on question while simulating it numerically, leading to a

conclusion that the initiation of subduction is to be studied from the perspective of mantle-lithosphere

interaction. Actually, subduction initiation [is] probably the least well-understood aspect of plate tectonic

theory (Silver and Behn, 2008).

During subduction, lithospheric plate undergoes flexural deformation causing disturbance in mantle. The

dynamics of the mantle flow field in subduction zones remains poorly understood, though it is necessary

for understanding of subduction. Schelart (2004) carried out some fluid experiments to study subduction

induced flow in upper mantle. Long and Silver (2009) studied mantle flow beneath subducting slabs using

shear wave splitting measurements. Russo (2009) concludes that a trench-parallel, subslab anisotropy

develops when the lithosphere subducts. Kumar (2010) simulated mantle flow around subducting slab

numerically (present author is part of this study).

The lateral deformation of subducting plate is a topic that has drawn little attention of workers. Laravie

(1975) prepared a geometric model of subducting slab and comparing it with the island arc, he predicted

lateral extension at deeper levels.

The rising plume-lithosphere interaction has been studied by very few researchers. Saunders et al (1992)

studied consequences of this interaction and suggested that the successive plume could heat the

lithosphere and reduce the viscosity to the effect of rupturing the plate due to regional plate forces.

However the interaction has not been seen from the perspective of subducting lithosphere.

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Several discontinuities are noticed along the mid-oceanic ridges from high resolution images of the sea

floor resulting a re-view of the oceanic lithospheric plate dynamic (Macdonald 1988). These faults are

closely related to plate spreading (Buck et al 2005). The slow, intermediate and fast spreading rates at

ridges shape the gravity anomalies at transform faults (Gregg et al. 2007). The phenomenon of transform

fault is still not explained.

References:

Buck W. R., L. L. Lavier & Alexei N. B. Poliakov (2005) Modes of faulting at mid-ocean ridges. Modes

of faulting at mid-ocean ridges. Nature 434, 719-723. doi:10.1038/nature03358.

DeCelles, P. G. et al (2001) Stratigraphy, structure, and tectonic evolution of the Himalayan fold-thrust

belt in western Nepal. Tectonics, vol 20; part 4, pages 487-509

Ganguly, J., Freed, A.M. and Saxena, S.K. (2008) Density profiles of oceanic slabs and surrounding

mantle: Integrated thermodynamic and thermal modeling, and implications for the fate of slabs at the 660

km discontinuity. Physics Earth Planet. Int., doi:10.1016/j.pepi.2008.10.005.

Gregg et al. (2007) Spreading rate dependence of gravity anomalies along oceanic transform faults.

Nature 448, 183-187. doi:10.1038/nature05962.

Kumar N., Sarkar S. and N. Mandal (2010) Numerical Modeling of Flow Patterns around Subducting

Slabs in a Viscoelastic Medium and its Implications in the Lithospheric Stress Analysis. Journal of the

Geplogical Society of India, vol. 75, no. 1 (Special Issue on ), pp 98-110.

Lavier Luc L. & Michael S. Steckler (1997) The effect of sedimentary cover on the flexural strength of

continental lithosphere. Nature 389, 476-479. doi:10.1038/39004.

Long, M. D., and P. G. Silver (2009), Mantle flow in subduction systems: The subslab flow field and

implications for mantle dynamics, J. Geophys. Res., 114, B10312, doi:10.1029/2008JB006200.

Macdonald K. C. et al. (1988) A new view of the mid-ocean ridge from the behaviour of ridge-axis

discontinuities. Nature 335, 217 - 225; doi:10.1038/335217a0.

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P. M. Russo (2009) Subducted oceanic asthenosphere and upper mantle flow beneath the Juan de Fuca

slab, Lithosphere , v. 1 no. 4 p. 195-205, doi: 10.1130/L41.1.

Saunders A. D., M. Storey, R. W. Kent & M. J. Norry (1992) Magma Generation and Break-Up

Processes Consequences of plume-lithosphere interactions. Geological Society, London, Special

Publications; 1992; v. 68; p. 41-60; DOI: 10.1144/GSL.SP.1992.068.01.04

Schellart, W. P. (2004), Kinematics of subduction and subduction-induced flow in the upper mantle, J.

Geophys. Res., 109, B07401, doi:10.1029/2004JB002970.

Shemenda, A I., (1994) Subduction: insights from physical modeling, Kluwer Academic Publisher,

Netherland, ISBN 0-7923-3042-0.

Silver, Paul G., Mark D. Behn. 4 January 2008. Intermittent Plate Tectonics? Science, Vol. 319, pp. 85-88

Work plan

The work is proposed to be carried out along three major steps: 1) literature review, preparation

of numerical models with greater geometric details and realistic material properties, 2) Numerical

simulations and validation of numerical results with available data, 3) Designing and running physical

model experiments.

Literature Review The literature review part is almost over by now. Some basic numerical models of

earth surfaces and interiors are already prepared.

Material Model Earth may be considered as viscoelastic, being viscous at tectonic time scale, and behave

like an elastic for shorter duration processes. The numerical models are based on this material

characteristic. The usual practice to model this kind of material behavior is to utilize spring-dashpot

combination to have a constitutive equation. Literature shows that the use of Maxwell viscoelastic models

is predominant in earth science research and present study will start considering earth interior as Maxwell

material. However the relaxation time of different parts of earth interior is different, depending on their

viscosities. The relaxation time may roughly be calculated as the ratio of viscosity and shear modulus of a

material undergoing viscoelastic deformation. The different relaxation behavior paves the way for

material anomaly causing shear at the material interface as well as within the material itself. However,

when the rising plume-lithosphere interaction is concerned, viscous fluid model obeying power law may

be an option to model the mantle.

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Validation Numerical results will be compared with the analogue model experiments and field

observation along with subsequent remodeling, if necessary. Analogue models of subduction initiation

may be developed following Shemenda (1994) who constructed the models of elastoplastic lithosphere

and semi-liquid asthenosphere utilizing a combination of paraffins, ceresins, mineral oils and finely

ground powders.

The whole process is subdivided into the following timeline:

1) Literature Review : 3 months

2) FE model : 2 yrs

3) Validation : 1 yr

Future plans

Knowledge about the tectonic movements, such as subduction initiation is still in very nascent stage. A

better understanding of these phenomena through numerical mantle-lithosphere interaction may open up

newer visions about how earth evolved and the geodynamic of earth system.

Details of the research funding received in the past and/ongoing projects

Following research funding received as fellowships:

1. Research Associate : IISER-Kolkata (From 7 November 2007 to 31 January 2010)

Detail of this work has been provided in the section titled ‘Research Work engaged in at Present’.

2. Research Fellow : Jadavpur University (From 21 June 2006 to 6 November 2007)

Detail of this work has been provided in the section titled ‘Research Work engaged in at Present’

3. CSIR Senior Research Fellow (From 2 June 2003 to 31 March 2006)

Detail of this work has been provided in the section titled ‘Research Work engaged in at Present’

4. Senior Research Fellow of a DST project (From 2nd October 2002 to 1st June 2003)

Ref. No. SR/S3/MECE/32/2002 from DST, Govt. of. India

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Title : Finite Element Analysis of Human Head Under Impact loading

6. Name and address of the institution where the proposal will be/likely to be

executed

Name : Department of Geological Sciences, Jadavpur University

Address : Jadavpur, Kolkata - 700032, West Bengal

7. Facilities provided/to be made available at the host institute

Lab space for physical model based experiments; Software for numerical simulation; Books and Journals

for reference.

8. Name(s) and address(es) of Indian expert(s) in the proposed area

1) Prof. H. B. Srivastava

Department of Geology,

Banaras Hindu University,

Varanasi - 221 005

Ph: 91-542-230-7311

Email: [email protected]

2) Prof. A.K. Dubey

Wadia Institute of Himalayan Geology,

33 General Mahadev Singh Road

Dehradun 248 001

Ph : 91-135-2627387


3) Prof. S. S. Rai,

National geophysical research institute

Uppal Road, Hyderabad-500606.

Andhra Pradesh, India.

Ph : +91-40-23434627, 23434815


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4) Prof. Malay Mukul

Department of Earth Sciences

IIT Bombay

Ph : +91-22-2576 7260


5) Dr. Ajay Manglik

National geophysical research institute

Uppal Road, Hyderabad-500606.

Andhra Pradesh, India

Ph : 91-40-23434684

Email : [email protected]

9. Details of financial requirements for three years (with justifications) and

phasing for each year:

S.No. Head 1st Year 2nd Year 3rd Year Total

1. Fellowship @Rs.20,000/-

p.m.

Rs. 2,40,000 Rs. 2,40,000 Rs. 2,40,000 Rs. 7,20,000

2. Manpower --- --- --- ---

3. Consumables:

Hydro-carbons for

analogue model including

Paraffins, PDMS, ceresins

and mineral oils.

Rs. 40,000 Rs. 40,000

4. Travel (within India) for

field observation, attending

conference, discussions

etc.

Rs. 10,000 Rs. 20,000 Rs. 20,000 Rs. 50,000

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5. Contingency for

purchasing Books,

Journals, small scale

Utensils and Instruments,

Computer Accessories,

Communications etc

Rs. 40,000 Rs. 50,000 Rs. 50,000 Rs. 1,40,000

6. Equipment (Generic Name

with minimum required

accessories, make & model

& Cost in Indian Rupees)

1) Quad-core workstations

for numerical simulations.

Make and Model

IBM IntelliStation® M Pro

(M50) with quad core

technology

Price

@1.2 lakh

Number

2

2) ANSYS 12.1 (R)

Software for Finite

Element Simulation

Make

ANSYS Software Private

Limited

Rs. 7,40,000 Rs. 7,40,000

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Perpetual license

Price

5 lakh

Number

1

7. Overhead Costs (@20% of

project cost)

Rs. 3,38,000

TOTAL Rs. 10,30,000 Rs. 3,50,000 Rs. 3,10,000 Rs. 20,28,000

TOTAL Rs. 20,28,000 (Including overhead of Rs. 3,38,000)

Rs. 16,90,000 excluding overhead

10. Have you ever applied before under this Scheme or Women Scientist

Scheme? If yes, give details (Name of the scheme, Title, subject area,

reference number, if any, year and the decision).

No.

11. Any other information in support of the proposed project:

The author has a working experience with the Structural Geology and Tectonics group led

by Prof Nibir Mandal, Department of Geology, Jadavpur University. This project work

will be pursued with the co-operation of this group.

12. Statement from the Present Employer as per Annexure-I (In respect of

person holding regular position).

Not Applicable.

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Detailed Biodata

1. Name of the Applicant:

Shamik Sarkar

2. Mailing Address :

Department of Geological Sciences

Jadavpur University, Kolkata - 700032

Email : [email protected],

Ph. 033-24146666 ext. 2364

3. Date of Birth & Gender:

10.12.1977, Male

4. Educational Qualifications (Starting from Graduation onwards):

1 Post-

Doc

2007-

2010

IISER-Kolkata Geodynamics

Modelling

2 Post-

Doc

2006-

2007

Jadavpur University Structural Geology

3 PhD 2006 Bengal Engineering and Science

University, Shibpur

Biomechanics

4 M.E. 2001 Jadavpur University 73% Biomedical

Engineering

5 B.E. 1999 Jadavpur University 64% Mechanical

Engineering

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5. Details of professional training and research experience, specifying period.

1. Research Associate : IISER-Kolkata (From 7 November 2007 -)



4. Senior Research Fellow of a DST project (No: SR/S3/MECE/32/2002) from DST,

Govt. of. India)(From 2nd October 2002 to 1st June 2003)

• Details of employment (past & present).

1. Research Associate : IISER-Kolkata (From 7 November 2007 -)



4. Senior Research Fellow of a DST project (No: SR/S3/MECE/32/2002) from DST,

Govt. of. India)(From 2nd October 2002 to 1st June 2003)

• List of publications during last five years

Kumar N., Sarkar S. and N. Mandal (2010) Numerical Modeling of Flow Patterns around

Subducting Slabs in a Viscoelastic Medium and its Implications in the Lithospheric Stress

Analysis. Journal of the Geological Society of India, vol. 75, no. 1 (Special Issue), pp 98-110.

Nibir Mandal, Atin Kumar Mitra, Shamik Sarkar and Chandan Chakraborty (2009) Numerical

estimation of the initial hinge-line irregularity required for the development of sheath folds: A

pure shear model, Journal of Structural Geology Volume 31, Issue 10, October 2009, Pages

1161-1173.

Manas Kumar Roy, Shamik Sarkar, and Sushanta Dattagupta (2009) Evolution of 180°, 90°, and

vortex domains in ferroelectric films Appl. Phys. Lett. 95, 192905.

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Shamik Sarkar, Amit Roychowdhury, Ujjalbhanu Ghosh (2008) Prediction of subdural

haematoma based on a 3D finite element human head model, International Journal of Vehicle

Safety, Vol. 3, No. 3 pp. 276 – 294.

M. Y. Mahmoud, A. K. Mitra, R. Dhar, S. Sarkar and N. Mandal (2007) Repeated emplacement

of syntectonic pegmatites in Precambrian Granite Gneisses: indication of pulsating brittle-ductile

rheological transitions. Published in International Conference Journal on Indian Dykes’07, BHU,

Narosa Publishing House.

6. Professional recognition, awards, fellowships received:

A) CSIR Senior Research Fellow (2003)

B) Qualified GATE-99 and got UGC scholarship during M.E.

C) Ranked 232 in WBJEE-1995

7. Any other information.

Expertise and experience in Finite Element method since 2000 (during M.E.).

Expertise and experience in Image processing during PhD. Expertise and experience

in FE softwares like ANSYS, LSDYNA, mathematical programs like MATLAB and

computer languages like C for 10 years.

Fast Track Proposal Final

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