Team: Hendrik MÃ¼ller (now BGR), Christian Hilgenfeldt, Katrin Schwalenberg (BGR)
Partner: BGR Marine Resource Exploration, K.U.M. Umwelt- und Meerestechnik GmbH
System: Controlled Source Electromagnetic (CSEM) imaging is a very promising method to explore marine resource of contrasting electrical conductivity and/or magnetic properties, e.g., Submarine Massive Sulphides (SMS), manganese nodules, phosphorites or heavy mineral placer deposits. However, the marine CSEM induction method demands spatially stable, operational robust and highly mobile sensor geometries of relatively large diameters, which has not been realized so far, especially not for deep-sea setting. On behalf of the German federal institute for mineral resources (BGR) we develop and built the CSEM platform âGoldenEyeâ providing an electromagnetic transmitter loop of 3.5 m in diameter on a robust fiberglass platform designed for both shallow water and deep sea applications from 10 m down to 5000 m water depth. The system features also video monitoring of the surrounding ecosystem to be used for damage prediction in the case of later ore extraction. It has been successfully deployed on two BGR RV Sonne cruises.
MÃ¼ller H., Schwalenberg K., Reeck K., Barckhausen U., Schwarz-Schampera U., Hilgenfeldt C., von Dobeneck T. (2018)
Mapping seafloor massive sulfides with the Golden Eye frequency-domain EM profiler
First Break, 36, 61 - 67
CSEM Deepsea sensor for the exploration of conductive and magnetic mineral ressources in the deep sea