Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on...

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Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details

Transcript of Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on...

Page 1: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Teaching Near-Surface Geophysics in the Field

Sarah KruseUniversity of South Florida

*see notes on Powerpoint file for details

Page 2: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Learning Goalsfor USF B.S. and M.S. students

and workshops in Latin America

Hands-on experience

Using physical intuitionbasic underlying physics

Forward modeling and processing toolbox

Science communicationwriting reportsdiscussing posters

Page 3: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics field opportunities at USF1. Principles of Applied Geophysics

Field project

Page 4: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsLogistics

Page 5: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsLogistics

Page 6: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsLogistics

Page 7: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsLogistics

Page 8: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsLogistics

Page 9: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsAssessment

toolbox

Page 10: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Principles of Applied GeophysicsData archive

Page 11: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics field opportunities at USF2. Geophysics Field Camp

Page 12: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Learning GoalsHands-on experience

Using physical intuitionbasic underlying physics

Forward modeling and processing toolbox

Science communication writing reports, combined analysis of multiple methods on site

Page 13: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field CampLogistics

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Geophysics Field CampLogistics

$

Page 15: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field CampLogistics

Page 16: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field CampLogistics

Page 17: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field CampLogistics

Page 18: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field Camp

Section heading Sample contentIntroduction Why this site?

Purpose of resistivity/conductivity measurements:Expect to see freshwater/saltwater interface (describe expected conductivity contrast)May see tar mats, buried tar mats (describe expected conductivity contrast)Ground truthing

Methods Equipment: AGI Supersting R8 resistivity meterField geometries: 28 electrodes, 1-m spacingAcquisition parameters: dipole-dipole and inverse Schlumberger array geometries, 2 cycles/readingProcessing software: Res2dinvProcessing steps: Editing data (what % removed, why?), inversion parameters, number of iterations,…

Results Map, position informationDescribe data volume, data qualityRaw data (if appropriate) = pseudosectionProcessed data = inversion Xsection(s)

Discussion On processed data image (preferably second copy), add notations with geologic interpretationsComparisons with ground truthingComparisons with other methods (if available)If appropriate, what didn’t work and why

Strengths and Limitations (of this method)

Finer spatial resolution than EM-31 or EM-34 (be quantitative if possible)Labor-intensive (xx hrs for xx meters of profile)

Assessment

Page 19: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field CampAssessment

Page 20: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics Field Camp

Page 21: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Geophysics field opportunities at USF3. Field Geophysics

Page 22: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field GeophysicsLogistics

Page 23: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field Geophysics

Section heading Sample contentIntroduction Why this site?

Purpose of resistivity/conductivity measurements:Expect to see freshwater/saltwater interface (describe expected conductivity contrast)May see tar mats, buried tar mats (describe expected conductivity contrast)Ground truthing

Methods Equipment: AGI Supersting R8 resistivity meterField geometries: 28 electrodes, 1-m spacingAcquisition parameters: dipole-dipole and inverse Schlumberger array geometries, 2 cycles/readingProcessing software: Res2dinvProcessing steps: Editing data (what % removed, why?), inversion parameters, number of iterations,…

Results Map, position informationDescribe data volume, data qualityRaw data (if appropriate) = pseudosectionProcessed data = inversion Xsection(s)

Discussion On processed data image (preferably second copy), add notations with geologic interpretationsComparisons with ground truthingComparisons with other methods (if available)If appropriate, what didn’t work and why

Strengths and Limitations (of this method)

Finer spatial resolution than EM-31 or EM-34 (be quantitative if possible)Labor-intensive (xx hrs for xx meters of profile)

Assessment

Page 24: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field Geophysics WorkshopsLatin America

Page 25: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field Geophysics Workshops Case studies for subsequent students with access

to site but not to equipment

Critical to find sites with some ground-truthing

Page 26: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field Geophysics Workshops

Page 27: Teaching Near-Surface Geophysics in the Field Sarah Kruse University of South Florida *see notes on Powerpoint file for details.

Field Geophysics Workshops