Crustal Geophysics and Geochemistry Science Center

Integrated Methods Development Project

Integrated Research Studies - East Antarctic Geophysical Surveys (Fire and Ice)

Subtask Objectives

This subtask addresses studies of volcanoes and ice-covered environments. The volcano studies link helicopter magnetic and electromagnetic data with lahar history, mineralogy, gas geochemistry and isotopic data to evaluate volcano hazards from landslides in altered rocks and from phreatomagmatic eruptions and to learn about the hydrothermal system. For the ice-covered environments, airborne gravity, magnetic, and radar data will be used with glaciological and geologic studies to help constrain models of ice sheet dynamics and climate history.

The goals of this task are to help determine the 3-dimensional distribution of alteration and fluids with magnetic and electromagnetic data in volcanoes to aid in hazards, water resource and mineral studies and to use airborne geophysical data to map Precambrian sub-ice geology that may host mineral deposits.

Airborne radar and potential-field imaging are the most cost-effective approach to explore ice sheet history and tectonic origin of the Gamburtsev Subglacial Mountains. The Gamburtsev Aerogeophysical Mapping of Bedrock and Ice Targets (GAMBIT team will address four fundamental questions: What role does topography play in the nucleation of continental ice sheets? How are major elevated continental massifs formed within intraplate settings but without a straightforward plate tectonic mechanism? How do tectonic processes control the formation, distribution, and stability of subglacial lakes? Where is the oldest climate record in the Antarctic ice sheet? We will acquire a major new airborne data set including: gravity; magnetics; ice thickness; Synthetic Aperture RADAR (SAR) images of the icebed interface; near-surface and deep internal layers; and ice surface elevation.

This study uses airborne geophysical data to derive links to lahar history, mineralogy, gas geochemistry, isotope data, ice sheet dynamics, and climate change associated with volcanoes and ice-covered environments.

Products

In Press

Finn, Carol A., Deszcz-Pan, Maryla, and Bedrosian, Paul, in review, Helicopter electromagnetic data map ice thickness at Mount Adams and Mount Baker, Washington: Journal of Glaciology, 32 p., in press.

Reports and Articles

Ferraccioli, Fausto , Carol A. Finn, Tom A. Jordan, Robin E. Bell, Lester M. Anderson, and Detlef Damaske, 2011, East Antarctic Rifting Triggers Uplift of the Gamburtsev Mountains: Nature, 479, p. 388-392, doi:10.1038/nature10566.

Finn, C.A., Deszcz-Pan, M., Anderson, E.D., and John, D.A., 2007, Three-dimensional geophysical mapping of rock alteration and water content at Mount Adams, Washington: Implications for lahar hazards: J. Geophys. Res., 112, B10204, 21 p., doi:10.1029/2006JB004783.

Finn, C.A., Deszcz-Pan, M., Anderson, E.D., and John, D.A., 2007, Three-dimensional geophysical mapping of rock alteration and water content at Mount Adams, Washington: Implications for lahar hazards: J. Geophys. Res., 112, B10204, doi:10.1029/2006JB004783.

Goodge, J.W., and Finn, C.A., 2010, Glimpses of East Antarctica: Aeromagnetic and satellite magnetic view from the central transantarctic mountains of East Antarctica: J. Geophys. Res., 115, B09103, 22 p., doi: 10.1029/2009JB006890.

Presentations, Posters, Abstracts

Behrendt, J.C., Finn, C.A., and Blankenship, D.D., 2007, Question of Ages of Cenozoic Volcanic Centers Inferred Beneath the West Antarctic Ice Sheet (WAIS) in the West Antarctic Rift System (WR) from Coincident Aeromagnetic and Radar Ice Sounding Surveys: Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract C51A-0068.

Behrendt, J.C., Finn, C., Morse, D.L., and Blankenship, D.D., 2007, One hundred negative magnetic anomalies over the West Antarctic Ice Sheet (WAIS), in particular Mt. Resnik, a subaerially erupted volcanic peak, indicate eruption through at least one field reversal, in, Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond, et al.: U.S. Geological Survey Open-File Report 2007-1047, Extended Abstract 030, 4 p. View Behrendt ISAES abstract [PDF file,1.7 MB].

Bell, R.E., Studinger, M., Ferraccioli, F., Damaske, D., Finn, C., Braaten, D.A., Fahnestock, M A., Jordan, T.A., Corr, H., Elieff, S., Frearson, N., Block, A.E., and Rose, K., 2009, The East Antarctic Ice Sheet and the Gamburtsev Subglacial Mountains (Invited): Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract G52B-03.

Bell, R.E., M. Studinger, and C.A. Finn, 2007, Tectonic control of subglacial lakes and ice sheet stability, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond, et al., U.S. Geological Survey Open-File Report 2007-1047, Extended Abstract 040, 4 p. View Bell ISAES abstract [PDF file,798 KB].

Damaske, D., Ferraccioli, F., Finn, C., and Studinger, M., 2009, Aeromagnetic surveying in remote, unexplored terrain: the Gamburtsev Mountains, East Antarctica: Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract GP13C-0780.

Deszcz-Pan, M., Finn, C.A., andAnderson, E., 2008, Inversion of Electromagnetic Data to Obtain Ice Thicknesses at Mts. Adams, Baker and Rainier, Washington: Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract C13A-0555.

Deszcz-Pan, M., Finn, C.A., and Anderson, E., 2007, Helicopter Electromagnetic and Magnetic Surveys over Volcanoes – Resolution Analysis: Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS31A-0153.

Ferraccioli, F., Bell, R.E., Studinger, M., Damaske, D., Jordan, T.A., Corr, H., Braaten, D.A., Gogineni, P.S., Fahnestock, M.A., Finn, C., and Rose, K., 2009, New Aerogeophysical exploration of the Gamburtsev Province (East Antarctica): Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C52A-01.

Ferraccioli, F., Jordan, T.A. , Finn, C. , Bell, R.E., Damaske, D., Braaten, D.A., and Studinger, M., 2010, New aerogeophysical insights into the Gamburtsev Subglacial Mountains enigma: Abstract T21D-2192 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Finn, C., Bedrosian, P.A., Horton, R., and Polster, S., 2010, Rock property measurements guide interpretation of electromagnetic, magnetic and gravity models at Mts. Adams, Baker, Rainier and St. Helens: Abstract T12A-05 presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.

Finn, C., Damaske, D., Ferraccioli, F., Studinger, M., Jordan, T.A., Rose, K., Block, A.E., Frearson, N., Bell, R.E., and Golynsky, A., 2009, Disclosing Precambrian secrets of the East Antarctic Shield: An aeromagnetic perspective from the International Polar Year: Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C52A-02.

Finn, C.A. and Deszcz-Pan, Maryla, 2011, Helicopter magnetic and electromagnetic surveys at Mts. Adams, Baker and Rainier, Washington: Implications for Debris Flows Hazards and volcano hydrology: Society of Exploration Geophysics Gravity, Electromagnetic and Magnetic Workshop, Beijing, Oct. 10-13, 3 p.

Finn, C.A., and Deszcz-Pan, Maryla, 2009, The 3-D distribution of alteration, ice and water from helicopter magnetic and electromagnetic surveys at Mts. Adams, Baker And Rainier, Washington: Implications for debris flows hazards: Geological Society of America, Abstracts with Programs, v. 41, no. 7, p. 717. View Finn GSA abstract.

Finn, C.A., Deszcz-Pan, M., Horton, R., Breit, G., and John, D., 2007, Helicopter-borne magnetic and electromagnetic data map rock alteration and water content: Implications for hydrothermal systems: Northwest Mining Association's 113th Annual Meeting: USGS Mineral Resources Program - Recent Results and Future Directions, 3-7 December 2007, Spokane, WA.

Finn, C.A., Deszcz-Pan, M., Horton, R., Breit, G., and John, D., 2007, Airborne magnetic and electromagnetic data map rock alteration and water content at Mount Adams, Mount Baker and Mount Rainier, Washington: Implications for lahar hazards and hydrothermal systems: Eos Trans. AGU, 88(52), Fall Meet. Suppl., Abstract NS34A-05.

Finn, Carol, Ferraccioli, F., and Golynsky, A., 2011, Geology of East Antarctica from a geophysical perspective: some of the latest news: International Symposium on Antarctic Earth Sciences, Edinburgh, Scotland, July 2011.

Finn, Carol, Ferraccioli, F., Jordan, T., Block, A., and Bell, R.E., 2011, Rift controls on the location of some large subglacial lakes in East Antarctica: International Symposium on Antarctic Earth Sciences, Edinburgh, Scotland, July 2011.

Finn, C.A., and Pisarevsky, S., 2008, Recent airborne magnetic data prefer SWEAT reconstruction of Laurentia with Antarctica and Australia to others: Eos Trans. AGU, 89(53), Fall Meet. Suppl., Abstract GP52A-07.

Finn, C.A. and S. Pisarevsky, 2007, New airborne magnetic data evaluate SWEAT reconstruction, in Antarctica: A Keystone in a Changing World – Online Proceedings of the 10th ISAES, edited by A.K. Cooper and C.R. Raymond, et al., U.S. Geological Survey Open-File Report 2007-1047, Extended Abstract 170, 4 p. View Finn ISAES abstract [PDF file,1.9 MB].

Jordan, T. A., Ferraccioli, F., Studinger, M., Bell, R.E., Damaske, D., Elieff, S., Finn, C., Braaten, D.A., and Corr, H., 2009, Investigating subglacial landscapes and crustal structure of the Gamburtsev Province in East Antarctica with the aid of new airborne gravity data: Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C43A-0484.

Studinger, M., Bell, R.E., Ferraccioli, F., Damaske, D., Finn, C., Braaten, D.A., Fahnestock, M.A., Jordan, T.A., Corr, H., Elieff, S., Robinson, C., Frearson, N., Geue, D., McMinn, M.C., Burton, B., Goldmann, F., Block, A.E., Bates, M., and Rose, K., 2009, AGAP: Exploring the Gamburtsev Subglacial Mountains with Aerogeophysical Surveys during the IPY: Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract C53B-08.

Invited Lectures

  • Syracuse University Geology Department, Mapping Terra Incognita in East Antarctica with airborne geophysical data, 10/2011 (Finn)
  • Syracuse University, panelist as part of the 2011-2012 University Lectures season called "State of the Earth" (Finn)
  • University of Colorado INSTAAR lecture series, Antarctic geology: The state of knowledge, 11/2010 (Finn)
  • South African Geophysical Association: Using airborne geophysics to map volcano hazards, 2/2009 (Finn)
  • St. Olaf's College, Aerogeophysical mapping of Precambrian basement, from Minnesota to Antarctica, 10/2008 (Finn)
  • Colorado School of Mines Heiland Lecture Series, Aerogeophysical mapping of Precambrian basement, Antarctica, 11/2007 (Finn)

Press Releases:

Outreach

  • Interviewed by the Columbian Newspaper, Vancouver, WA for article on Mt. St. Helens helicopter geophysical survey (Finn)
  • Participated in an AGU press conference on the Gamburtsev Mountains, Antarctica (Finn)
  • Participated in the roll-out of Afghanistan data products at the Afghanistan Embassy, Washington, DC (Finn)
  • Filmed interview for a History Channel television program entitled, "Megadisasters: An American Volcano." (Finn)

Other Activities

  • Finn, C., Board of Director for Center for Remote Sensing of Ice Sheets, University of Kansas.

Contact Information

Carol Finn
Box 25046 MS 964 Denver Federal Center
Denver, CO 80225-0046
Phone: 303-236-1345
Email: Carol Finn

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