Field Geophysics at SAGE Strategies for Effective Education

Field Geophysics at SAGE: Strategies for Effective Education BRAILE, Lawrence W. ; BALDRIDGE, W. Scott; JIRACEK, George R. ; BIEHLER, Shawn; FERGUSON, John F. ; PELLERIN, Louise; MCPHEE, Darcy K. ; BEDROSIAN, ; Paul A. ; SNELSON, Catherine M. ; and HASTEROK, Derrick P. Larry Braile braile@purdue. edu http: //web. ics. purdue/~braile SAGE website: http: //www. sage. lanl. gov/ Science for Planet Earth

A Brief History of SAGE (Summer of Applied Geophysical Experience) 2012 – Our 30 th Year! SAGE is a unique program of education and research in geophysical field methods for undergraduate and graduate students from any university and for selected professionals. The core program is held for four weeks each summer in New Mexico and for an additional week in the following academic year at San Diego State University for U. S. undergraduates supported by NSF. Each year 25 -30 students participate in SAGE after being selected from a wide range of large and small colleges and universities. Since SAGE was initiated in 1983, 730 students have participated in the program. NSF Research Experience for Undergraduates (REU) funding for SAGE began in 1990 and 319 REU students have completed SAGE through 2011.

Main Objectives of SAGE Teach the Major Geophysical Exploration Methods (Seismic, Gravity, Magnetics, Electromagnetics) Apply the Methods to the Solution of Specific Problems (Environmental, Archaeological, Hydrologic, Geologic Structure and Stratigraphy) Integration of Methods, and Geology Present Career Options in Geophysics Student Professional Development Research in the Rio Grande Rift Area

SAGE Program Schedule Summary Summer (~4 weeks, Rio Grande rift area, New Mexico) Exploration geophysics theory and applications, classroom/lab/discussion (7 days). Geophysical field work (1 day – near-surface archaeological site, 5 days – basin scale field area). Geology field trips (3 days). Data processing, analysis, interpretation, preparation of oral and written reports – interpretation and method teams (5 days). Student presentations and written reports (2 days). Presentations by visitors – industry, government, academia (mostly evening talks, equivalent of 2 days). R & R days (2 days). Follow-up workshop for REU students in January Additional analysis and interpretation of the data from summer and preparation of abstracts for presentation at professional meetings (5 days).

Geophysical Exploration Methods Near-surface Archaeological geophysics – seismic refraction, electromagnetics (EM), magnetics, GPR Basin scale field area – Gravity/GPS Seismic refraction CMP seismic reflection profiling Magnetics Magnetotellurics (MT) Seismics Transient Electromagnetics (TEM) Magnetics GPR EM

Gravity/GPS Gravity Stations and Map

Archaeological Site - GPR Image Kiva? Magnetics 1 m

Seismic Reflection and Refraction Vibroseis Truck “Flagging”

Driving the Vibe Truck – “Priceless”

SAGE Student Driver – Whoa!!!

Seismic Reflection and Refraction Fault Refraction Reflection shot gathers

Seismic Reflection and Refraction Processed and Stacked CMP Reflection Seismic data acquisition in the “doghouse”

Electromagnetics

Electromagnetics N 2 -D Model of TEM Soundings SBlue is resistive 1700 m 0 Elev. 1800 m Ohm. m 200 1600 m Red is conductive 1500 m 0 m Distance 3400 m

SAGE 2010 Geophysics Highlights Blue is resistive MT sounding indicating midcrustal conductor at ~ 20 km depth. West-East CMP stacked seismic reflection record section. La Bajada fault plane reflections on right.

Successful Strategies (developed and refined over the years) 1. Learning by doing; immersion (intense program/schedule). 2. Mix of lecture/discussion; field work; data processing and analysis; modeling and interpretation; presentation of results. 3. Two tier team approach (interpretation/integration teams – each team includes person representing different methods; technique oriented teams). Provides focus, indepth study, opportunity for innovation (technique oriented teams), and promotes teamwork and multidisciplinary approach (interpretation/integration teams). 4. Emphasis on presentations (discussion on how to prepare and deliver a 12 minute talk) – teams (all team members) make presentation; each student completes a written report (SEG expanded abstract format); professional development.

Successful Strategies (developed and refined over the years) 5. Experiment Design Discussion – safety, constraints, data quality/quantity, research objective, educational experience, set parameters for survey, why multidisciplinary? , etc. Students drive discussion. 6. Multiple methods (each student gains experience with all methods), and information on careers (students really appreciate); networking. 7. Student experiences and interactions (many of the students become friends for life). 8. Measures of success - High rate of continuation to graduate school (about 75% of SAGE undergraduates), support and feedback from industry participants and visitors, student evaluations at end of program, presentations at professional meetings, publications, faculty evaluation of student work.

SAGE Students – Geology Field Trip SAGE website: http: //www. sage. lanl. gov/

Additional SAGE Information: 8: 00 AM – 12: 20 PM, Tuesday, Dec. 6, MCS Halls A-C T 21 A-2316. Seismic and Gravity Investigation of the Eastern Boundary of the Santo Domingo Basin, Rio Grande Rift, New Mexico (Poster) 8: 00 AM – 12: 20 PM, Tuesday, Dec. 6, MCS Halls A-C H 21 E-1170. Geophysical Characterization by the SAGE Program of a Newly Proposed, Low Temperature-EGS Prospect in the Central Rio Grande Rift, New Mexico (Poster) SAGE 2012 Information: http: //web. ics. purdue. edu/~braile/sage/SAGE 2012. pdf SAGE website: http: //www. sage. lanl. gov/ This PPT: http: //web. ics. purdue. edu/~braile/sage/Field. Geophysics. ppt

Challenges for the Future Maintaining funding Program is expensive (low student/faculty ratio, all offcampus, geophysical equipment and field work). Support for SAGE (funds and “in-kind” support): NSF REU program, Los Alamos Natl. Lab, US DOE, USGS, Industry, Society of Exploration Geophysicists, participating universities. Recruitment We continue to have many excellent student applicants However, we have had limited success in increasing the diversity of SAGE students. Added a component of SAGE to involve Native American students from New Mexico Pueblos. Maintaining momentum and continuously enhancing program Requires significant commitment of faculty. Enhancements each year based on student feedback and faculty consideration of successes and failures.