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J2-366: Closing the Scoop Valve
To close the valve on a scooper sampler two of Jason manipulator arms are needed. In a spectacular hand-off performed by two of the Jason pilots, the red valve is closed in one swift movement.
Data Types: video excerpt
J2-368: Rock Sample on North Rift
In the north rift there are plenty examples of beautiful pillow basalts including lobate volcanic toes. Since these toes have a small diameter and have a thick glassy rim, they are very interesting for rock sampling.
Data Types: video excerpt
Erosion and Subsidence of Hawaiian Islands and Seamounts
This diagram shows the variations of subsidence and erosion of the Hawaiian Islands and Emperor Seamounts. From this diagram it is evident that as an island is carried by the overriding plate farther from the hotspot they begin to subside and eventually are completely submerged. Volcanoe ...
Data Types: diagram
Active and Potentially Active Hawaiian Volcanoes
This spreadsheet shows 7 of the younger Hawaiian island volcanoes and data regarding their eruption type, year of last eruption and current eruption status. From this data set it can be concluded that as plate motion moves a volcano further from the hotspot eruption activity will eventually cease.
Data Types: spreadsheet
Scoop sample 1 at Ula Nui
During dive J2-307 of the FeMO2007 cruise this was one of the first samples taken from Loihi Seamount, deep on its southern rift where a low temperature hydrothermal site called Ula Nui was discovered during the FeMO2006 a year earlier.
Data Types: video excerpt
J2-368: Bacteria Trap Recovery 2
Bacteria get trapped in this triple chamber sampler. After a year in Loihi's hot vents, it is rather evident that the iron-oxidation is strong and heavily promoted by the abundant microbes.
Data Types: video excerpt
Cross Section of the Internal Structure of the Mauna Kea Volcano
Schematic cross section for the internal structure of Mauna Kea volcano (Big Island of Hawaii) near the end of the subaerial shield stage based on results from HSDP2 drilling and submersible observations of Mauna Loa and Loihi volcanoes.
Data Types: diagram
Tropical Pacific CTD Data at 1 meter Intervals
Table representing CTD Data (Temperature, Salinity, Pressure, Oxygen, and Sound Velocity) taken at 1 meter depth intervals. This particular profile is taken close to Loihi Seamount, Hawaiian Islands.
Data Types: spreadsheet
Cultivation of novel marine Fe-oxidizing bacteria from the Loihi Seamount
Iron is one of the most abundant energy sources for lithotrophic organisms on Earth, yet very few cultures exist of Fe-oxidizing bacteria (FeOB) that can utilize Fe(II) as a sole energy source at circumneutral pH. Much of the work that has been done on FeOB is from freshwater habitats, s ...
Data Types: presentation
Variability in microbial mat communities from the pre- and post-eruption Loihi volcano
Loihi Seamount is an active submarine volcano that marks the southernmost extent of the Hawaiian hot-spot. Loihi rises over 3000 meters from the seafloor and summits nearly 1000 meters below sea level. Hydrothermal activity was discovered at Loihi in 1987, yielding diffuse vent effluent (Tma ...
Data Types: presentation
Loihi Seamount Bathymetry
This image shows the bathymetry of Loihi seamount. Loihi seamount is a feature in the Hawaiian-Emperor chain and is currently actively erupting. Loihi is thought to be the current location of the Hawaiian Hotspot. Loihi is a growing seamount and will likely grow to become an island.
Data Types: map
CARD-FISH approaches for characterizing endolithic rock-hosted microbial populations
In this keynote presentation for the First SBN Workshop Katrina Edwards discusses the process of basalt-weathering as promoted by endolithic microbes that colonize volcanic rocks at seamounts and on the flanks of mid-ocean ridge spreading centers at and below the seafloor. She hypothesize ...
Data Types: presentation
Tumult in Samoa
Is the Samoan volcanic chain the result of a hotspot or plume? Or not? Argued for decades, the discovery of volcanic activity at Vailulu'u seamount certainly supports the hotspot/plume model. Vailulu'u anchors the east end of the Samoan chain, much as Loihi anchors the Hawaiian chain's eas ...
Data Types: presentation
Looking Inside Loihi with Electrical Resistance Tomography
In July 2006, we will carry out a completely novel study of the Loihi Seamount. Using Electrical Resistance Tomography (ERT), we will map the electrical conductivity structure of the interior of this active volcano.
Data Types: poster
Collecting a Rock Specimen near Pisces Peak on Loihi Seamount
A 1995 lava flow on Pisces Peak was sampled systematically in a grid to study microbial biodiversity.
Data Types: video excerpt
Exposure Experiments at Pisces Peak
Pisces Peak is used as a natural laboratory site for seawater exposure conditions without hydrothermal input. Some experiments have been exposed for more than 5 years.
Data Types: video excerpt
Validating an Exposure Experiment on Loihi Seamount
Jason 2 visited the site of a three-month exposure experiment on Loihi Seamount. We used Niskin bottles for these experiments and checked whether the bottles are open.
Data Types: video excerpt
Eager Scientists Getting to their Samples
Dive J2-365 was retrieved around 9 AM. All scientists scrambled to get their samples from the bioboxes to the lab in as short a time as possible.
Data Types: video excerpt
Dive J2-365 Marker 36
This is one of the first videos recorded with the Jason while retrieving experiments near Marker 36 in Pele's Pit!
Data Types: video excerpt
J2-368: Finger Chimney Scooping
These finger chimneys are abundant in some places in the venting areas of Loihi. Here scientists use a scooper to sample these rather fragile and small chimneys for in-depth microbial investigation.
Data Types: video excerpt

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