Blogs

Rig Floor Reflections

One of the best things about being an Expedition 352 Education and Outreach Officer is the opportunity to learn about all parts of the drilling process.  From the geology of the drill sites to the roles of each individual on the JR, everything is fair game; no question is too basic or trivial as everyone takes up the task of helping me learn.

Quiet Shifts, Crazy Crossovers…

This past week we completed drilling and geophysical logging of the hole at Site 1440B, and then we used the ship’s thruster system to slowly motor back the ~8 km to Site 1439, where at midnight we deployed a re-entry cone to set up for hard-rock drilling near Site A – first they quick-drill through the sediments, then they case the hole for stability before deploying their hard-rock RCB drill bit

Logging without an axe

Though structural geologists use our smaller sample of cored rock to form the larger picture of what its surrounding rock may look like, confirmation about the hole’s physical and chemical traits comes from the work of our logging staff scientist, Sally Morgan.

Rescue at Sea

It all started when a bird flew into one of the uprights of the derrick and fell onto the rig floor.  

The relay to save the bird initiated with Ken, the chief rig mechanic, who came into the lab and asked:  “Does anyone want to box a bird?”

Reconstructing History

When you consider how much magmatic activity occurred in the Izu-Bonin-Mariana forearc, the core from which we intend to gain so much historical geologic information may seem disproportionately small in comparison.  We collect cores no bigger than 60-62 mm (less than 2.5 inches) in diameter, which provide a very limited, but representative, view of the surrounding rock. 

Outline of A Scientist’s (me...) Day on Shift

• Up at 9 PM (!!), in a pitch-black room (no windows in the JR cabins, so a headlamp for camping or caving is very useful in the morning….)

Geek Blog 2: Why boninites matter....

So, why is it such big "news" that we drilled into boninite (that's them, in the teaser pic!), aside from the truth-in-advertising thing, that the Cruise Prospectus said we were going to find it?

Sorting Data!

At the start of the week we moved from Site BON-2A and Hole 1439A to Site BON- 1A, and we’ve started to drill Hole 1440A, which is ongoing. When an IODP science team completes a drillsite, a Site Report is required (IODP participation involves writing many different reports – Daily Updates, Weekly Updates, Site Reports, and of course the Initial Reports from the cruise).

Haunted by ghost core!

Well, it’s really not as spooky as it sounds. 

A unique way to install a reentry system at Site U1440B

Since we have already drilled a hole at Site U1440 (approximately 20 meters from where we are now) and collected sediment cores from that hole up until we hit hard rock, we started our second hole in a whole new way. Because this hole will be used to obtain cores from deeper depths we need to 'case' the hole to keep it stable. We also need to be able to re enter it several times.

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