JC24: Dating volcanoes on the Mid-Atlantic Ridge


 JC24



Cruise diary


Thursday 12 June 2008

Despite the fact that we are not currently in our study area at the moment, the science team are still managing to do science. In today’s meeting we tried to evaluate what we have learnt so far and bearing this in mind, where should we survey in the limited amount of time we have left. This resulted in one of the sampling dive tracks being rerouted and a survey dive being planned over the area that now seems likely to contain the hydrothermal vent.

As we are due to arrive back on site early tomorrow morning we also planned out what we would do first. We decided that as we had not yet carried out any survey dives, this was a priority and the first one was planned to cover a horizontal section across the middle of the AVR. We hope this will give us a better idea of how the west and eastern sides differ and what the contact relationships are between different types of lava flow.

Survey dives are different to sampling dives because Isis flies 100m above the seabed and uses sonar to produce extremely high-resolution bathymetric maps of small areas. Check back tomorrow to see how we get on.


Spot the difference! The new Sprocket the Isis team fitted this morning.



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May 2008