ADMAP-2: The next-generation Antarctic magnetic anomaly map

• Main Authors: Alexander Golynsky, Dmitry Golynsky, Fausto Ferraccioli, Tom Jordan, Detlef Damaske, Don Blankenship, Jack Holt, Duncan Young, Sergey Ivanov, Alexander Kiselev, Wilfried Jokat, Karsten Gohl, Graeme Eagles, Robin Bell, Egidio Armadillo, Emanuelle Bozzo, Giorgio Caneva, Carol Finn, Rene Forsberg, Alan Aitken, Yoshifumi Nogi, Marta Ghidella, Ralph von Frese, Hyung Rae Kim, Jongkuk Hong, Jesus Galindo-Zaldivar
• Other Authors: European Geosciences Union, Golynsky, Alexander, Golynsky, Dmitry, Ferraccioli, Fausto, Jordan, Tom, Damaske, Detlef, Blankenship, Don, Holt, Jack, Young, Duncan, Ivanov, Sergey, Kiselev, Alexander, Jokat, Wilfried, Gohl, Karsten, Eagles, Graeme, Bell, Robin, Armadillo, Egidio, Bozzo, Emanuelle, Caneva, Giorgio, Finn, Carol, Forsberg, Rene, Aitken, Alan, Nogi, Yoshifumi, Ghidella, Marta, von Frese, Ralph, Rae Kim, Hyung, Hong, Jongkuk, Galindo-Zaldivar, Jesus
• Format: Conference Object
• Language: English
• Published: European Geophysical Society 2017
• Subjects: Antarctic; The Antarctic; Dronning Maud Land; Wilkes Land; Aitken; Prince Charles Mountains; Gamburtsev Subglacial Mountains; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/11567/893702

The Antarctic Digital Magnetic Anomaly Project compiled the first international magnetic anomaly map of the Antarctic region south of 60ºS (ADMAP-1) some six years after its 1995 launch (Golynsky et al., 2001; Golynsky et al., 2007; von Frese et al., 2007). This magnetic anomaly compilation provided new insights into the structure and evolution of Antarctica, including its Proterozoic-Archaean cratons, Proterozoic-Palaeozoic orogens, Palaeozoic-Cenozoic magmatic arc systems, continental rift systems and rifted margins, large igneous provinces and the surrounding oceanic gateways. The international working group produced the ADMAP-1 database from more than 1.5 million line-kilometres of terrestrial, airborne, marine and satellite magnetic observations collected during the IGY 1957-58 through 1999. Since the publication of the first magnetic anomaly map, the international geomagnetic community has acquired more than 1.9 million line-km of new airborne and marine data. This implies that the amount of magnetic anomaly data over the Antarctic continent has more than doubled. These new data provide important constraints on the geology of the enigmatic Gamburtsev Subglacial Mountains and Prince Charles Mountains, Wilkes Land, Dronning Maud Land, and other largely unexplored Antarctic areas (Ferraccioli et al., 2011, Aitken et al., 2014 ̧ Mieth & Jokat, 2014, Golynsky et al., 2013). The processing of the recently acquired data involved quality assessments by careful statistical analysis of the crossover errors. All magnetic data used in the ADMAP-2 compilation were delivered as profiles, although several of them were in raw form. Some datasets were decimated or upward continued to altitudes of 4 km or higher with the higher frequency geological signals smoothed out. The line data used for the ADMAP-1 compilation were reprocessed for obvious errors and residual corrugations. The new near-surface magnetic data were corrected for the international geomagnetic reference field and diurnal effects, edited for ...