October 11- October 17, 2003
PurposeThe Taney Seamounts are a short chain of volcanoes that formed roughly 25 million years ago adjacent to the Pacific-Farallon spreading center. They are similar in structure to other near-ridge chains of seamounts like the Vance and President Jackson Seamounts and are characterized by large and commonly deep calderas that expose thick sections of lava flows that made up the seamounts. Our primary objective is to sample these exposed sequences of lavas and to evaluate the changes and composition of the lavas as the volcanoes grew. The greatest obstacle to success of this mission is the ubiquitous coverage of hydrogenous Mn-oxide crusts on the outcrops, which will impede sampling. At the same time, we will be assessing how these calderas formed from their structure. Ancillary observation and collection of benthic animals will be conducted by guest biologists, with particular emphasis on crinoids that should inhabit the upper portions of the seamounts
EquipmentDrawer with partitions and one bio box, manipulator, biojars on drawer front
Expedition Chief Scientist: David Clague
Expedition Principal Investigator: David Clague
[Note: A temporary email address is listed after each name. Add suffix "at mbari dot org," which is spelled out to reduce spam.]
Dave Clague wf1, Brian Cousens wf2 (Carleton University, Ottawa), Alice Davis wf3, Veronica Franklin wf4 (MBA), Nadine Golden wf5, James Hein wf10 (USGS), Lonnie Lundsten wf6, Charles Messing wf8 (NOVA Southeastern University, FL), Jenny Paduan wf9, John Graybeal wf7.
ScheduledStartDtg: 2003-10-11 0930 Local Moss Landing time
ScheduledEndDtg: 2003-10-17 1630 Local Moss Landing time
The plan is to sail from Moss Landing to arrive on site for the first dive by 6 am Oct. 12. All the sites are within easy overnight transits of each other. The 5th and final dive, on Oct. 16, would be completed in time to make the tide on Friday Oct. 17 in the afternoon. All the dives will take place in a box bounded by 125°5'W, 125°40'W, 36°35'N, and 36°55'N. The deepest dive will begin at close to 4000 m and the shallowest point on any dive will be about 2160 m.