Juan de Fuca Ridge Cruise
July 20 - August 1, 2000
650 km (~400 miles) off the Washington-Oregon Coast
Multiple-Barrel Rock Coring Sled: A special gear sled was developed for this project. Gear sleds attach to the bottom of the ROV's and allow the scientists to use different types of specialized equipment with the same vehicle. For this project, the Tiburon was equipped for the first time with a piece of equipment called the "multiple barrel rock coring sled." The coring sled will be used to take samples of rock on vertical outcrops in order to give us a 3 dimensional understanding of the volcanic history around the ridge. We will be taking samples adjacent to the areas where we have sampled in the past in order to build on our knowledge.
Pictures and full story
In Situ Osmosamplers and Osmoanalysers: During the cruise we will be picking up equipment that was left during the '98-'99 NeMO cruises, and will be dropping off more samplers and analyzers to leave for long-term sampling. We will be leaving 2 iron analyzers and 3 osmosamplers at Axial Seamount, one osmosampler at "Magnesia," a low temperature site, and one osmosampler at "Ashes," a high temperature vent site.
Tiburon Wax Cores: These are specially designed cylinders that are filled with a special kind of wax (researchers used "Surfwax" up until a few years ago!) which stays sticky in the cold deep ocean water. The manipulator arm on the ROV Tiburon grabs hold of the wax cores by means of a cylindrical rubber handle and literally "whack" the wax covered end onto volcanic rock. (See picture to the left - the handles of the corers can be seen clearly in the foreground) The glassy surface of the rock (which forms when lava cools rapidly) sticks to the wax. Even just a small amount of wax is sufficient to run tests on to determine trace and major elements that are present in the rocks. This analysis will give something similar to a "genetic makeup" of the rock, letting scientists know of its origin.