Kannberg P, Kroeger KF, Pecher IA, Armerding C, Perez J, Woelz S, Ray C, King R, Boettger L, Turco F, Hill T. 2021. CSEM, TOPAS and Echo Sounder survey of the Southern Hikurangi Margin 1st – 13th November: RV Tangaroa TAN2012 voyage report. Lower Hutt (NZ): GNS Science. 32 p. (GNS Science report; 2021/11). doi:10.21420/VJZ0-2Y67.
Abstract
The TAN2012 voyage took place between the 1st and 13th of November 2020 aboard RV Tangaroa. Controlled source electromagnetic (CSEM) data, multibeam bathymetry, single beam echo sounder, water column and TOPAS sub-bottom profile data were collected at the southern end of the Hikurangi subduction margin. CSEM profiles were collected along existing regional 2D reflection seismic lines to characterise and quantify gas and gas hydrate accumulations in the sub-seafloor. Multibeam bathymetry and water column data, as well as single-beam echo sounder data, were acquired in tandem with CSEM data. The hydro-acoustic datasets supplement and expand on data from earlier voyages. A high-resolution TOPAS dataset was collected to further characterise an active seep site. This report describes the background and technical procedures of data collection during the voyage. (auth)
