Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 51547 10.2205/2022ES000801 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Compiling ship and airborne measurements for the Antarctic's second-generation magnetic anomaly map Compiling ship and airborne measurements for the Antarctic's second-generation magnetic anomaly map Голынский Александр Владимирович Golynsky Alexander V. https://orcid.org/0000-0001-8717-0894 Голынский Дмитрий Александрович Golynsky Dmitry A. von Frese Ralph R. B. von Frese Ralph R. B. «Всероссийский научно-исследовательский институт геологии и минеральных ресурсов Мирового океана имени академика И. С. Грамберга» (ФГБУ "ВНИИОкеангеология") Санкт-Петербург Россия VNIIOkeangeologia, All-Russian Scientific Research Institute for Geology and Mineral Resources of the World Ocean St. Petersburg Russian Federation Всероссийский научно-исследовательский институт геологии и минеральных ресурсов мирового океана им. акад. И.С. Грамберга Россия All-Russia Research Institute for Geology and Mineral Resources of the World Ocean (VNIIOkeangeologia) Russian Federation School of Earth Sciences Columbus США School of Earth Sciences Columbus United States of America 02 07 2022 02 07 2022 22 3 1 21 23 12 2021 30 05 2022 https://rjes.ru/en/nauka/article/51547/view

In 2001, the Antarctic Digital Magnetic Anomaly Project produced the ADMAP-1 compilation that included the first magnetic anomaly map of the region south of 60◦S. To help fill ADMAP-1’s regional coverage gaps, the international geomagnetic community from 2001 through 2014 acquired an additional 2.0+ million line-km of airborne and marine magnetic anomaly data. These new data together with surveys that were not previously in the public domain significantly upgraded the ADMAP compilation for Antarctic crustal studies. The merger of the additional data with ADMAP-1’s roughly 1.5 million line-km of survey data produced the second-generation ADMAP-2 compilation. The present study comprehensively reviews the problems and progress in merging the airborne and ship magnetic measurements obtained in the harsh Antarctic environment since the first International Geophysical Year (IGY 1957–58) by international campaigns with disparate survey parameters. For ADMAP-2, the newly acquired data were corrected for the diurnal and International Geomagnetic Reference Field effects, edited for high-frequency errors, and levelled to minimize line-correlated noise. ADMAP-2 provides important new constraints on the enigmatic geology of the Gamburtsev Subglacial Mountains, Prince Charles Mountains, Dronning Maud Land, and other poorly explored Antarctic areas. It links widely separated outcrops to help unify disparate geologic and geophysical studies for new insights on the global tectonic processes and crustal properties of the Antarctic. It also supports studies of the Antarctic ice sheet’s geological controls, the crustal transitions between Antarctica and adjacent oceans, and the geodynamic evolution of the Antarctic crust in the assembly and break-up of the Gondwana and Rodinia supercontinents.

In 2001, the Antarctic Digital Magnetic Anomaly Project produced the ADMAP-1 compilation that included the first magnetic anomaly map of the region south of 60◦S. To help fill ADMAP-1’s regional coverage gaps, the international geomagnetic community from 2001 through 2014 acquired an additional 2.0+ million line-km of airborne and marine magnetic anomaly data. These new data together with surveys that were not previously in the public domain significantly upgraded the ADMAP compilation for Antarctic crustal studies. The merger of the additional data with ADMAP-1’s roughly 1.5 million line-km of survey data produced the second-generation ADMAP-2 compilation. The present study comprehensively reviews the problems and progress in merging the airborne and ship magnetic measurements obtained in the harsh Antarctic environment since the first International Geophysical Year (IGY 1957–58) by international campaigns with disparate survey parameters. For ADMAP-2, the newly acquired data were corrected for the diurnal and International Geomagnetic Reference Field effects, edited for high-frequency errors, and levelled to minimize line-correlated noise. ADMAP-2 provides important new constraints on the enigmatic geology of the Gamburtsev Subglacial Mountains, Prince Charles Mountains, Dronning Maud Land, and other poorly explored Antarctic areas. It links widely separated outcrops to help unify disparate geologic and geophysical studies for new insights on the global tectonic processes and crustal properties of the Antarctic. It also supports studies of the Antarctic ice sheet’s geological controls, the crustal transitions between Antarctica and adjacent oceans, and the geodynamic evolution of the Antarctic crust in the assembly and break-up of the Gondwana and Rodinia supercontinents.

 Antarctic Digital Magnetic Anomaly Project Airborne and shipborne magnetic surveys Data processing Map compilation Crustal studies of the Antarctic Antarctic Digital Magnetic Anomaly Project Airborne and shipborne magnetic surveys Data processing Map compilation Crustal studies of the Antarctic SCAR's ADMAP expert group members and their affiliated institutions contributed raw and processed magnetic survey data and cooperated in developing the new compilation. New data acquisitions were supported by Germany's Helmholtz Zentrum fur Polar und Meeresforschung of the Alfred Wegener Institut and the Bundesanstalt fur Geowissenschaften und Rohstoffe, the Italian Antarctic Research Programme, the Russian Ministry of Natural Resources, the British Antarctic Survey/National Environmental Research Council, the US' National Science Foundation and National Aeronautics and Space Administration, the Australian Antarctic Division and Antarctic Climate \& Ecosystem Cooperative Research Centre, and the French Polar Institute. We are grateful to all members of the ADMAP expert group for their contributions and thank Graeme Eagles, Rene Forsberg, Tom Jordan, Jamin Greenbaum, Jason Roberts, Kirsteen Tinto and Jinyao Gao, for providing geodetic coordinates of the recently acquired airborne and marine magnetic surveys. We appreciate the constructive suggestions provided by the editor and journal reviewers. We thank SCAR for supporting the activities of the ADMAP expert group, and grants PM15040 and PE19050 from the Korea Polar Research Institute (KOPRI) funded the compilation at the All-Russian Scientific Research Institute for Geology and Mineral Resources of the World Ocean (VNIIOkeangeologia). SCAR's ADMAP expert group members and their affiliated institutions contributed raw and processed magnetic survey data and cooperated in developing the new compilation. New data acquisitions were supported by Germany's Helmholtz Zentrum fur Polar und Meeresforschung of the Alfred Wegener Institut and the Bundesanstalt fur Geowissenschaften und Rohstoffe, the Italian Antarctic Research Programme, the Russian Ministry of Natural Resources, the British Antarctic Survey/National Environmental Research Council, the US' National Science Foundation and National Aeronautics and Space Administration, the Australian Antarctic Division and Antarctic Climate \& Ecosystem Cooperative Research Centre, and the French Polar Institute. We are grateful to all members of the ADMAP expert group for their contributions and thank Graeme Eagles, Rene Forsberg, Tom Jordan, Jamin Greenbaum, Jason Roberts, Kirsteen Tinto and Jinyao Gao, for providing geodetic coordinates of the recently acquired airborne and marine magnetic surveys. We appreciate the constructive suggestions provided by the editor and journal reviewers. We thank SCAR for supporting the activities of the ADMAP expert group, and grants PM15040 and PE19050 from the Korea Polar Research Institute (KOPRI) funded the compilation at the All-Russian Scientific Research Institute for Geology and Mineral Resources of the World Ocean (VNIIOkeangeologia).

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