MT measurements can, therefore, form an excellent complement to other geophysical data, particularly in settings where high-impedance volcanic rocks or salt make the interpretation of other geophysical data challenging. This is why we have been asked to acquire MT data in settings such as the Red Sea, which has complex salt structures.
Large receiver capacity
The high-sensitivity, low-noise receivers used for measuring MT data are exactly the same as those used for CSEM data acquisition. The large receiver capacities of our vessels offer the optimal MMT data recording time during a survey. Using more receivers means they remain on the seafloor for longer during data acquisition, which automatically increases the duration of MT data recording and, additionally, affords increased data processing options for the MT data acquired. Apart from during pure MMT data recording time, uncontaminated MMT data are also recorded during 3D CSEM acquisition when the CSEM source is active in the part of the receiver grid far from the recording receiver. Thus, MT data are acquired inherently during CSEM surveys. A longer MMT data recording time is nearly always better, particularly for the longer and shorter periods.