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Scheinert M, Ferraccioli F, Schwabe J, Bell R, Studinger M, Damaske D, Jokat W, Aleshkova N, Jordan T, Leitchenkov G, Blankenship DD, Damiani TM, Young D, Cochran JR, Richter TD. New Antarctic Gravity Anomaly Grid for Enhanced Geodetic and Geophysical Studies in Antarctica. Geophys Res Lett 2016; 43:600-610. [PMID: 29326484 PMCID: PMC5759340 DOI: 10.1002/2015gl067439] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gravity surveying is challenging in Antarctica because of its hostile environment and inaccessibility. Nevertheless, many ground-based, airborne and shipborne gravity campaigns have been completed by the geophysical and geodetic communities since the 1980s. We present the first modern Antarctic-wide gravity data compilation derived from 13 million data points covering an area of 10 million km2, which corresponds to 73% coverage of the continent. The remove-compute-restore technique was applied for gridding, which facilitated levelling of the different gravity datasets with respect to an Earth Gravity Model derived from satellite data alone. The resulting free-air and Bouguer gravity anomaly grids of 10 km resolution are publicly available. These grids will enable new high-resolution combined Earth Gravity Models to be derived and represent a major step forward towards solving the geodetic polar data gap problem. They provide a new tool to investigate continental-scale lithospheric structure and geological evolution of Antarctica.
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Affiliation(s)
- M. Scheinert
- Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
| | - F. Ferraccioli
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK
| | - J. Schwabe
- Institut für Planetare Geodäsie, Technische Universität Dresden, Dresden, Germany
| | - R. Bell
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | | | - D. Damaske
- Bundesanstalt für Geowissenschaften und Rohstoffe, Hannover, Germany
| | - W. Jokat
- Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung, Bremerhaven, Germany
- University of Bremen, Geoscience, Department, Bremen, Germany
| | | | - T. Jordan
- British Antarctic Survey, High Cross, Madingley Road, Cambridge, UK
| | - G. Leitchenkov
- VNIIOkeangeologia, St. Petersburg, Russia
- St. Petersburg State University, St. Petersburg, Russia
| | - D. D. Blankenship
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
| | - T. M. Damiani
- National Geodetic Survey, NOAA, Silver Spring, MD, USA
| | - D. Young
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
| | - J. R. Cochran
- Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, USA
| | - T. D. Richter
- Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, TX, USA
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Whittaker JM, Müller RD, Leitchenkov G, Stagg H, Sdrolias M, Gaina C, Goncharov A. Response to Comment on "Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time". Science 2008. [DOI: 10.1126/science.1157501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Accurately locating boundaries between continental and oceanic crust is topical in view of locating offshore boundaries relevant to margin formation models, plate kinematics, and frontier resource exploration. Although we disagree with Tikku and Direen's interpretations, the associated controversies reflect an absence of agreed-upon geophysical criteria for distinguishing stretched continental from oceanic crust, and a lack of samples from nonvolcanic margins.
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Affiliation(s)
- J. M. Whittaker
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - R. D. Müller
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - G. Leitchenkov
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - H. Stagg
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - M. Sdrolias
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - C. Gaina
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - A. Goncharov
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
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Whittaker JM, Müller RD, Leitchenkov G, Stagg H, Sdrolias M, Gaina C, Goncharov A. Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time. Science 2007; 318:83-6. [DOI: 10.1126/science.1143769] [Citation(s) in RCA: 217] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
- J. M. Whittaker
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - R. D. Müller
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - G. Leitchenkov
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - H. Stagg
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - M. Sdrolias
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - C. Gaina
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
| | - A. Goncharov
- EarthByte Group, School of Geosciences, University of Sydney, Sydney 2006, Australia
- VNII Okeangeologia (Antarctic Branch), St. Petersburg 190121, Russia
- Geoscience Australia, Canberra 2601, Australia
- Center for Geodynamics, Norwegian Geological Survey, Trondheim 7491, Norway
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