IGPP-Sponsored Workshop on Fluid Flow and Transport
through Faulted Ignimbrites and other Porous Media
Posters can be put up between Sunday evening at 5:00 p.m. and Tuesday morning.All posters will be up for the entire workshop.
7:00
PM Reception
7:30-8:15
AM Breakfast
8:30
AM Leave Ghost Ranch for Field
Trip (box lunches will be provided)
Field Trip Topic: Deformation Bands in Nonwelded Ignimbrites: Petrophysical Controls on Fault-Zone Deformation and Evidence of Preferential Vadose-Zone Fluid Flow Jennifer Wilson (New Mexico Tech, NMT), Laurel Goodwin (NMT), and Claudia Lewis (Los Alamos National Lab, LANL)
Presentations on Field Trip:
Analysis of intrinsic and extrinsic controls on fault-zone deformation of poorly lithified materials, and implications for hydrologic studies Laurel Goodwin (NMT), Jennifer Wilson (NMT), and Geoffrey Rawling (New Mexico Bureau of Geology and Mineral Resources, NMBGMR
Deformation-band faults in sand are conduits for vadose-zone fluid flow in arid environments John Sigda (NMBGMR) and John Wilson (NMT)
5:15 PM Return to Ghost Ranch
5:45 PM Banquet
7:30-8:15
AM Breakfast
Oral presentations:
8:20 AM Introductory remarks
8:30 AM Keynote: Mechanical deformation and permeability evolution of porous media Teng-Fong Wong (SUNY, Stonybrook)
9:10 AM A comparative analysis of fault zone architectures in welded tuff at Yucca Mountain, NV, with implications for paleohydrology Mary Beth Gray (Bucknell University), John Stamatakos (Center for Nuclear Waste Regulatory Analyses, CNWRA), David Ferrill (CNWRA) and Mark Evans (Univ. of Pittsburgh)
9:30 AM Internal architecture, permeability structure, and hydrologic significance of contrasting fault-zone types Geoffrey Rawling (NMBGMR), Laurel Goodwin (NMT), and John Wilson (NMT)
Poster Session I:
9:50 AM Authors introduce posters (4 minutes each)
10:15
AM Break to view/discuss
posters, Coffee Break
Preliminary
investigation of microscale fault textures associated with aseismic creep and
coseismic rupture in active fault zones S.M.
Cashman (Humboldt State University), J.N.
Baldwin (Wm. Lettis and Associates), and K.V. Cashman (Univ. of Oregon, Eugene)
Cataclasis and particulate flow in faulted, poorly lithified sediments Geoffrey Rawling (NMBGMR) and Laurel Goodwin (NMT)
Fracture-based
deformation in a non-welded ignimbrite of the Bandelier Tuff Claudia Lewis
(LANL), Alexis Lavine (LANL), Jennifer Wilson (NMT), and Danielle Katcher
(LANL)
Deformation of
non-welded Bishop Tuff: processes and impact on fluid flow in the unsaturated
zone Kelly Keighley
Bradbury (Utah State University) and James Evans (Utah State University)
Characteristics
of brittle distributed deformation zones in Precambrian crystalline rocks of
the central Colorado Front Range Jonathan
Caine (U.S. Geological Survey)
11:30 AM Reconvene for discussion, led by panel including Teng Fong Wong, Mary Beth Gray, Geoffrey Rawling
Potential topics for discussion: 1) Differences between deformation behavior of granular media and fully lithified rock. 2) Extrinsic (e.g., confining pressure, strain rate) versus intrinsic (e.g., porosity, cementation) controls on fault-zone deformation processes: can we predict fault-zone architecture and permeability structure? 3) Effective integration of experimental deformation studies and field research. 4) Large versus small-displacement faults; how do fault zones evolve and what are the implications of that evolution for hydrologic modeling?
12:00 PM Lunch
Oral presentations:
1:30 PM Keynote: Hydrologic impact of faults in granular media John Wilson (NMT)
2:10 PM In situ measurement of nonwelded tuff permeability where heterogeneities are induced by fault zone deformation, Bishop Tuff, Bishop, California Cynthia L. Dinwiddie(CNWRA) and Kelly K. Bradbury (Utah State University)
2:30 PM Simulated Impact of Faults on CO2
Injection for Oil Recovery and CO2
Sequestration Craig Forster (Univ. of Utah, Salt Lake City)
Poster Session II:
2:50 PM Authors introduce posters (4 minutes each)
3:10 PM Break to view/discuss posters,
Coffee
Break
Fault zone properties and potential for compartmentalization of groundwater aquifers in poorly lithified, Rio Grande rift-related, Santa Fe Group sediments, New Mexico Jonathan Saul Caine (U.S.G.S.), Scott M. Minor (U.S.G.S), V. J. S. Grauch (U.S.G.S.), and Mark R. Hudson (U.S.G.S.)
Interpretation of pneumatic
field tests in unsaturated fractured rocks at the Apache Leap Research Site,
Arizona Velimir V. Vesselinov (LANL)
The Role of Diffusive Mass Transfer on Nonreactive Solute Transport in Fractured Volcanic Tuff Timothy J. Callahan (LANL), Paul W. Reimus (LANL), and Robert S. Bowman (NMT)
Investigation of the influence of faults on groundwater movement and contaminant migration in the Pahute Mesa/Oasis Valley flow model domain, Nevada Andrew Wolfsberg (LANL), Ed Kwicklis (LANL), Dave Broxton (LANL), Dave Vaniman (LANL),Wendy Soll (LANL), and Carl Gable (LANL)
4:15 PM Reconvene for discussion, led by panel including John Wilson, Cynthia Dinwiddie, Craig Forster
Potential topics for discussion:
1) Effective incorporation of qualitative geologic data into quantitative hydrologic models.
2) Constraints on saturated and unsaturated fault-zone permeability structure.
3) Upscaling issues.
5:15 PM Break
5:45 PM Dinner
7:30-8:15 AM Breakfast
MORNING
SESSION: Fault-Zone Diagenesis
Oral
Presentations:
8:30 AM Keynote: Fault zone diagenesis - what we see and what we don't in examples from Southern California James Boles (Univ. California, Santa Barbara)
9:30 AM A hydrologic perspective on fault-zone diagenesis John Sigda (NMBGMR)
Poster Session III
9:50 AM Authors introduce posters (4 minutes each)
10:05 AM Break to view/discuss posters, Coffee Break
Petrophysical,
geochemical, and inferred hydrologic characteristics of deformation bands in
nonwelded ignimbrites of Los Alamos, NM, and Busted Butte, NV Jennifer Wilson (NMT), Laurel Goodwin (NMT), and Claudia
Lewis (LANL)
Fault-zone
diagenesis as a record of fluid-rock interaction along the Pen Branch fault
zone, US DOE Savannah River Site, subsurface southern Appalachians Allen Dennis (Univ. of South Carolina, Aiken)
An analysis of the role
of fluids in fracture initiation and propagation using direct simulation of the
coupled fluid-solid system David
Boutt (NMT)
Neutron-CT imaging of
nonwelded Bandelier Tuff, with and without fluids Martin Wilding (UC, Davis) and
Chip Lesher (UC, Davis)
11:00 PM Reconvene for discussion, led by panel including James Boles, Marjorie Chan, and John Sigda
Potential topics for discussion: 1) More effective utilization of fault-zone diagenesis as a record of fluid-rock interactions and paleohydrology. 2) The impact of diagenetic minerals on reactive flow and transport. 3) Using diagenetic history and microstructural analysis to determine relative timing of deformation and lithification.
12:00 PM Lunch
AFTERNOON SESSION
1:30 PM Discussion: Future Directions in Study of Fluid-Fault Interactions in Granular Porous Media. Among other topics, we will discuss approaches to:
2:30 PM Wrap-up and summary of key results of meeting Laurel Goodwin, Claudia Lewis, and Jennifer Wilson
3:00 PM End of formal meeting. Participants are encouraged to continue discussion or explore Santa Fe!