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Ph.D. candidates | Institute of Earth Sciences

Ph.D. candidates

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Hadar Cohen-Sadon

Ph.D. candidate
Advisors: Prof. Alon Amrani and Dr. Yoav Oved Rosenberg
Interests:  Geology, Isotope-Geochemistry, biogiochemical cycles of carbon and sulfur, organic-geochemistry, paleo-environment.
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Yaniv Darvasi

Ph.D candidate
Advisors: Prof. Amotz Agnon.
The Neev Center for Geoinfomatics

Interests: Ground Motions, Seismic hazards, Earthquakes, Site Response, UAV photogrammetry, and Ground penetrating radar (GPR)

 

Dissertation Title: Integration of geophysical methods to study the shallow subsurface

 

chen davidson

Chen Davidson

Ph.D candidate
​​​​​​​Advisors: Prop. Alon Amrani and Prop. Alon Angert

Interests:  Biogeochemical cycles, Carbonyl sulfide, Sulfur isotopes, Gross primary production

Dissertation Title: Carbonyl sulfide Sulfur isotopes ratios in seawater and in the atmosphere

Adar

 Adar Glazer

Ph.D candidate
Advisors: Prop. Dov Avigad and Dr. Navot Morag

 

 

Interests:  Geology, Tectonics, Provenance, Paleo-geographic and tectonic reconstructions, Zircon U-Pb-Hf studies

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Ynon Hefets

Ph.D candidate
Advisors: Prof. Carynelisa Haspel

Interests: PhD - Scattering of electromagnetic radiation by anisotropic particles in the Ocean and Atmosphere, Air and Underwater light polarization.

(MSc – Non-Linear Optics, Physics of Plasma, High-Intensity Lasers)

Yoni Israeli

Yoni Israeli

Ph.D student, supervised by Simon Emmanuel
Room 129 North

Impact of mineral dissolution and precipitation on the wetting behavior of non-aqueous phase liquids in groundwater systems.

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During the past few years the focus of my research has been to develop state-of-the-art microscopy and numerical techniques to study the interaction between minerals and fluids at a macro and nanometer scale. My main study is aimed at exploring a fundamental scientific problem of exploring how mineral alterations influence wetting behavior. My research is aimed to determine the way mineral precipitation, dissolution and replacement impact the wetting behavior of non-aqueous phase liquids (NAPLs) in rocks and soils at the micrometer and nanometer scales. We expect that alteration of wettability at the pore scale will affect field scale phenomena, such as pollutant mobility. Since wetting behavior controls the adhesion of liquid contaminants to minerals, my study is expected to have important practical implications to the quality of groundwater and to the environment.
I am also studying the way in which minerals undergo weathering from the macro to the nanoscale. I developed a numerical model to assess the effect of grain size and rock composition on chemical weathering and grain detachment. The model simulates the weathering of a rock comprising grains with various sizes composed of two different minerals with different reactivities. Our simulations showed that grain detachment represents more than a third of the overall weathering rate. We also found that as grain size increases, the weathering rate initially decreases; however, beyond a critical size, the rate became approximately constant. Our results could help predict the sometimes-complex relationship between rock type and weathering rate (for more details: https://www.earth-surf-dynam.net/6/319/2018/esurf-6-319-2018.html).

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Ilya Kutuzov

Ph.D candidate
Advisors: Prof. Alon Amrani

 

Interests:  Organic-geochemistry, Isotope-Geochemistry, Paleo-environment, Petroleum-geochemistry, Basin-modeling, Speleology

Dissertation Title: Study of the volatile organic sulfur compounds in gas and oil reservoirs

Amit Meltzer

Amit Meltzer

Ph.D candidate
supervised by Ronit Kessel

 

Research interests: experimental petrology, geochemistry of high-pressure high-temperature fluids, thermodynamic modelling.

Research topic: The metasomatism and evolution of high-density fluids.

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Sutapa Patra

Ph.D candidate
Advisors: Prof. Alon Amrani and Dr. Yoav Oved Rosenberg

Interests:  Geology, organic-geochemistry, petroleum geochemistry, biomarkers, compound specific sulfur isotopes, carbon isotopes, paleo-environment