Atilla Aydin
I am interested in the formation, geometric patterns and fluid flow properties of fractures and faults in a broad range of scales. My students and I are involved in projects which require both modeling and a strong field component. The field component is similar to a detective's work, which aims to establish temporal and spatial relationships among various elements of a structure. The modeling component is like the moral of a story, which enables one to see through the rationale and use it for guidance in the future.

David Pollard
My students and I are using quantitative field data and principles of structural geology, combined with laboratory and computer modeling, to address fundamental questions about processes of faulting, fracturing and rock deformation. Geologic structures play important roles in attempts to utilize nature's gifts wisely and to mitigate natural hazards. Our research aims to understand how faults and fractures affect the flow of magma, groundwater, and hydrocarbons, and the crucial role fractures play in earthquake generation and volcanic eruption.

Graduate Students
Stephan Bergbauer
For my research here at Stanford I propose to modify "traditional" curvature analysis of dome and fold structures with the purpose of quantifying fracturing by calculating strains and stresses directly from the principal curvatures of a bedding surface. In contrast to previous techniques in which various components of "curvature" have been used directly as a measure of fracture density, this technique is based on the fact that fractures form as a result of stress acting across a potential fracture plane, and thus includes calculation of stresses as a result of doming or folding. A field study will be used to evaluate the predictive potential of this approach.

Nick Davatzes
My primary interests concern the evolution of rheologic properties as deformation proceeds in the brittle regime. Specifically, I am interested in understanding how faulting mechanisms (e.g., deformation banding, jointing, pressure solution, tail cracking, brecciation) interact and affect subsequent deformation. Much of my work is field based and involves the mapping of different structures in and around normal fault zones. From these observations I can document the relative geometry, distribution, and timing of specific structures and infer the mechanisms responsible for producing them. These observations are examined in the context of parent lithology, contrast between juxtaposed lithologies, fault offset, and deformation history.

Eric Flodin
I am a second year graduate student working towards a PhD; my primary advisor is Atilla Aydin. Currently, I am working on a project with Manika Prasad (Geophysics Department) and Atilla that attempts to distinguish differing deformation styles in porous sandstone based on differing petrophysical properties (Vp, Vs, porosity, etc.). In the future, my research will focus on characterizing the fluid flow properties of faults in sandstone. This project will utilize a multidisciplinary approach integrating field mapping, field experimentation, geostatistics, and numerical flow modeling.

Juan Mauricio Flores
I am a first year graduate student. I am interested in the role fractures play in petroleum reservoir flow, even in reservoirs that are considered "non-fractured". Specifically I am interested in how we can determine the key factors controlling fracture permeability, quantify and model fracture permebility and porosity, and identify heterogeneity due to fracturing from seismic data.

Brita Graham
I am in my first year of the Ph.D. program here at Stanford University working with Atilla Aydin. I am currently researching different areas of interest in which to focus my studies. Possibilities include carbonate fracture analysis in the Canadian Rockies and Italy. Previously, as an undergraduate at the University of Michigan at Ann Arbor (GO BLUE!) I studied stress/strain patterns in the Appalachian foreland using calcite twinning analysis with Dr. Ben van der Pluijm. After graduating in December 1998 I began working with Jon Hagstrum at the USGS in Menlo Park. While there I worked with paleomagnetics, on an ongoing project to create a secular variation curve for the Pacific Northwest and Hawaii. Now, I begin my journey as a Ph.D. pre-candidate. Only time can tell what brilliant science has yet to be discovered.

Aya Kameda
As one of the 1st year Ph.D student with Dave Pollard, my interest consists of fault mechanics with an emphasis on earthquake hazards. My M.S. thesis in Geophysics from University of Wisconsin-Madison assessed mechanical efficiency of faults under the Los Angeles basin using numerical modeling and constraints from geodetic and geological observations. Currently, as part of the newest member of the Geomechanics Group at Stanford, I am exploring the application of the fault mechanics in earthquake and fault-related deformation problems to tackle on for the next…some years.

Jordan Muller
I am a first-year student interested in the large (M>7) 1999 earthquakes along the North Anatolian fault in northwestern Turkey. It has been shown that earthquakes can cause increased (or decreased) stress on neighboring faults which can promote (or reduce) the l ikelihood for future failure. I plan to investigate the effects of stress transfer due to these recent shocks on faults in the surrounding Marmara Sea region which are in close proximity to Istanbul. I am also interested in topics of engineering geology including slope stability and the role of fractures in engineering design.

Phil Resor
As a First year student I am still "shopping" around for a research project. I am currently investigating gravity-driven extension. Gravity-driven deformation occurs in large deltas, volcanoes, and possibly entire orogens when the topographic load exceeds the internal strength of the body. Gravity-driven extension in deltas is the best chronicled of these phenomena, due to its association with major hydrocarbon reserves. Possible areas for investigation include, Why are the widespread normal faults typically listric and arcuate in plan view? How does this shape effect the surrounding rocks and create structures such as rollover anticlines and subsidiary faults?

Scott Young
I am a fourthyear Ph.D. student. My research uses elastic boundary value modelling to try to constain fault geometries in areas of poor-quality seismic data. The method involves extrapolating interpreted faults and comparing the modelled deformation at a well-mapped horizon to the observed deformation.

Post-docs & Visiting Scientists
Taixu Bai
My research interests fall within the general realm of quantitative structural geology, with emphasis on the application of mechanical theories in the study of rock structures. More specifically, through field, laboratory, analytical and numerical studies, I focus on geometric properties of fractures including their distribution, spacing, linkage and connectivity, and factors controlling their evolution and geometries such as tectonic loading, mechanical properties of rocks and internal fluid pressure. In the past few years, I studied cross joint geometries, and joint spacing and aperture in layered rocks. Presently, I am working on mechanisms for the formation of orthogonal cross joints and trying to build a tool for tectonic stress field recovery using orthogonal cross joints data. Also I am planning to investigate the "abnormal stress field" in the San Andreas area with consideration of fault interaction.

Peter Eichhubl
Visiting Scientist from and Postdoctoral Fellow
Monterey Bay Aquarium Research Institute

My research interests bridge low-temperature geochemistry and structural geology, including the effects of fluids and fluid flow on the rheology of faults, the structural control of subsurface fluid flow, and the interaction between fluid and rock as it affects brittle deformation.

eichhubl@pangea.stanford.edupersonal web page

Herve Jourde
I'm a post doctoral student at Stanford University working with Atilla Aydin. My research is undertaken within the Rock Fracture Project group and financed by the Department of Energy. The focus of my research is on the hydrodynamic of fractured reservoirs in layered sedimentary rocks and on the pressure transfer occurring during pump tests. More recently I dealt with the hydrodynamic properties of strike-slip faults and on the impact of the slip amount on the permeability tensor characteristics (magnitude and direction) resulting of an upscaling procedure.
The innovative products expected from my research, using a combination of numerical analysis and field studies are to: (1) contribute to the understanding of the particular flow behavior in fractured sedimentary reservoirs, (2) provide new ideas on the use of reservoir modeling to analyze flow behavior in weakly developed karstic terrains, (3) create a new methodology to infer fault permeability properties from numerical map analysis and numerical modeling, (4) provide new methods to predict spatial distribution of permeability properties along faults to import into reservoir flow simulation.

Ioannis Koukouvelas
Department of Geology
University of Patras
Patras, Greece

My research interests are in structural geology with an emphasis on brittle tectonics. Specifically, through field mapping of normal faults and fault patterns, morphotectonic analysis, and paleoseismological excavations I am trying to understand, in a quantitative manner, analogies between past and present deformation. Furthermore, I am analyzing granite emplacement processes and the deformation in high-strain shear zones. I am using quartz c-axis analysis, thin-section observations, and detailed field mapping of plutons, to understand the spatial and temporal evolution of crustal scale structures.

Lidia Lonergan
Royal Society University Research Fellow
Imperial College, UK

While at Stanford I am working on two projects: (1) the growth of polygonal faults in mudrock sequences. and (2) the mechanics of clastic injection and remobilisation. In the polygonal fault project I intend to use Poly3D to investigate linkage mechanisms in polygonal fault arrays and compare modelled displacements with displacments measured on North Sea 3D seismic datasets. My other research interests include the quantification of fracture patterns, late orogenic extension in the Western Mediterranean and the thermal modelling of sedimentary basins.

ldial@pangea.stanford.edupersonal web page

Frantz Maerten
I am working with Dave Pollard as a visiting researcher specializing in computer programming. I am optimizing and parallelizing the existing Poly3D code in order to develop new functions to treat the influence of topography, multi-layer effects, and dynamic fracture propagation in three dimensions. Parallel to this development in C++, I developed a new multi-platform graphic interface (in Java, C++ and Python), which enables one to control Poly3D parameters, such as the creation of models (importing/constructing/modifying faults), the three-dimensional visualization of computed data, the creation of import/export filters, etc. This multi-platform and evolutionary component-software will be intended for use by the petroleum industry.