JC24: Dating volcanoes on the Mid-Atlantic Ridge


 JC24



Cruise diary


Saturday 21 June 2008

SCIENCE DAYS REMAINING: 3
HYDROTHERMAL VENTS FOUND: 0

By this morning the weather had improved enough that we were able to recover Isis. Unfortunately despite surveying the area thoroughly we never found the elusive hydrothermal vent, but the data we collected will help us in our interpretations of the AVR so is still useful.

Today Kirsty has also informed us that the new biobox arrangement (the ‘Tivey Quiver’ as it has been nicknamed) was hugely successful. Corals came back in much better condition than before and were also easier to identify.

Just before 10:00 this morning we launched dive 93. This is a sampling dive across the area where we carried out the swath survey on dive 91. It has been plotted on a very detailed bathymetric map produced using this data by Tim and Kay and covers two transects on the eastern flank of the AVR. We also then plan to do two swaths on the western flank (100m above the bottom) to collect magnetics data in order to investigate whether interesting magnetics patterns Maurice has noticed on the eastern flank are also present on the Western one.

 
The Tivey Quiver in action.



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May 2008