Patricia Persaud's blog

Cabin - May 4

To give you an idea of how big the cabins are, here is a photo of our cabin on the Fo'c's'le Deck<. I stood in the doorway to take the photo. My bunk is the top one. The shower sink and toilet are to the right through another door.

Nannofossil Discoaster – Wed, May 3

This is a photo of three different species of Discoaster viewed under the microscope. Note the scale in the bottom left of 0.01 mm. The Discoaster varabilis (six limbs with knobs on the end of each limb)  are the three larger nannofossils in the left half of the pic. These are about 10-15 micrometers in width. The D. pentaradiatus (five limbs) are more common in the right half of the photo.

Reentry Cone – Tue, May 2

Here is a sequence of photos from yesterday’s activities in the Moon Pool, an opening in the ship for access to the sea. The crew had already spent many hours preparing over 700 m of casing; that is 62 joints of 10.75-in casing lowered through the moon pool into the sea.  In these photos, the reentry cone looks like a bull’s-eye and will be face up on the seafloor.

The Moon Pool - Mon, May 1

This is a pic of the Moon Pool, a mechanical wonder. So cool to have seen this today for the very first time! We are busy revising reports, so more on this in the next post.

Downhole Temperature – Sun, Apr 30

We measure temperature with the Advanced Piston Corer Temperature-3 (APCT-3). The APCT-3 is used in soft sediments similar to most of the core material we have encountered so far. The instrument obtains formation temperatures. These temperature measurements are used to determine the temperature gradient (how much the temperature changes with depth beneath the seafloor).

Water Everywhere - Fri, Apr 28

There is water everywhere, but you don’t really notice how close it is. The JR is so big that even the lowest deck seems high above the sea surface.The JR has seven decks, numbered 1 to 7 from the top down. My cabin is on Deck 5 - Fo'c'sle, which also contains the chemistry, microbiology, paleontology, and X-ray laboratories.

Logging Tools 101 – Wed, Apr 26

When a hole is drilled in the ground, lot of things happen. It will collapse and deform in various ways, e.g., swell, washout, you name it. If the hole is in good shape we can “run” logging tools in the hole to measure and confirm the lab measurements we are getting on the cores. Data from the tools are very useful because they are in situ measurements and usually quite reliable.

Stop and think - Tue, Apr 25

During my PhD I was busy with lots of things, collecting data, processing data, analyzing results, and so on. Late one evening on my way home, I am about to leave the building and ran into Peter Goldreich, a professor in Planetary Science. I started explaining all of the things I am busy doing and he advised me to stop and think a little, that it was more important than doing a lot.

Beautiful People – Mon, Apr 24

I have been super fortunate to meet some amazing girls (56 to be exact and their teachers) from the STEM Magnet Academy of Pointe Coupee just outside Baton Rouge, LA. This post is dedicated to them. The girls visited LSU just last month to watch the movie Hidden Figures.

Magnetizing – Sun, Apr 23

This is a pic from the lab space used by the group working on the paleomagnetic signature in the cores. The small cubed-shape samples of the core are first wrapped in those shiny wrappers and passed through the Superconducting Rock Magnetometer (SRM) in the back, which measures the remanent magnetism in three directions. i.e., the permanent magnetism present in a rock before any treatment.
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