Blogs

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.

Houston, we've landed on….Boninite

Our entire mission is dependent on seismic data and our interpretation of it. We can be wildly off, or spot on with what we think we’ll encounter during drilling. It’s a highly educated guess, but what worried many members of the team was drilling through too much sediment before they hit the hard rock.

A new drillsite, and working through a 3 meter heave...

I finally got myself to sleep after the excitement of our first cored rocks, but I left the computer on so I could see what else they pulled up during the day shift. When I got up we had moved, albeit very slowly, to our next planned drillsite, BON 1A.

Geek Blog, entry 1: Some of the science behind my Leg 352 participation....

So, why am I, a seriously land-loving geologist on this ship? Because I have spent my career examining rocks and processes associated with subduction.

There be rocks down there!

At the back end of my last shift, a core came up with very little recovery. This is always suspicious, because marine sediments core easily with recoveries better than 80% nearly all the time.

Hurry up and wait....

A busy daytime of core retrieval was had by all while I slept. I kept my computer on on the desk by my bed, so I could check in on progress should I wake up for any reason during my sleep time (and I didn't - good news!).

What "core on deck!" means in the Geochemistry Lab....

I went to bed anticipating active work on cores, and got up for my next shift to discover: my colleagues were STILL anticipating active work on cores. Some challenges on the drilling floor delayed their appearance, but around 4 AM the first sediment cores from IODP Hole 1439A (site BON-2A in the prospectus) were carried onto the catwalk for cutting and basic examination.

Core on Deck!

These are the words we’ve waited to hear.

Shift-ing and seasickness and sunrise

I took to my bed mid-afternoon yesterday in hope of shedding my jetlag and getting onto my midnight-to-noon shift in one fell swoop. It ALMOST worked - I was up in time for my midnight watch, but my body insisted I should be in bed, making me rapidly cross-eyed as I tried to compile and examine chemical data for boninites to use as a reference frame for examining what we'll drill.

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