CONTROLLED SOURCE SEISMIC INVESTIGATION OF THE CRUSTAL STRUCTURE BENEATH EREBUS VOLCANO AND ROSS ISLAND, ANTARCTICA

• Main Author: Shoba Maraj
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Austral; Lava Lake; Mount Erebus; Ross Island; Victoria Land; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.211.2647; http://www.ees.nmt.edu/outside/alumni/papers/2011t_maraj_s.pdf

System (WARS), which is an area of active crustal extension. Mount Erebus, located on Ross Island is one of the few volcanoes on Earth that has a persistent, convecting lava lake. Marine geophysical observations north of Ross Island have identified the north-south trending Terror Rift within the older and broader Victoria Land Basin, which is a component of the WARS. Mount Erebus and Ross Island are circumstantially associated with the Terror Rift and its thin (∼20 km) crust. The nature and extent of the Terror Rift in controlling the evolution of Ross Island volcanism and the on-going eruptive activity of Erebus volcano are unknown. A controlled-source seismic experiment (Tomo-Erebus, TE) was undertaken during the 2008-2009 Austral summer field season to examine the shallow magmatic system beneath Erebus volcano (TE-3D) and the deeper crustal structure beneath Ross Island (TE-2D). This work investigates the TE-2D component, which was designed to produce a two-dimensional P wave velocity model along a 76 km east-west profile across Ross Island. For TE-2D, 21 seismic recorders (Ref