Jeff Ryan's blog

Unwind-time at sea....

Magnificence (back) at Fantangisna, and Playing Catch-up...

Sorry to have been offline so long - but we have been BUSY here!

Retracing Our Steps on a Vagabond Engineering Tour

We are currently sailing north toward Asut Tesoru Seamount, after having spent a day pounding a stuck bridge plug down the 200+ meter cased hole at Yinazao Seamount.  This after several days reaming and casing a hole at Fantangisna Seamount - which we're going to visit again, to check on how cement in that hole is holding up, after we sort out what's happening at the bottom of  t

Puzzlement at Fantangisna, and (hopefully) fixing stuff

New Sites, New Rocks, New Challenges

It's been a busy number of days here on the JR since my last post!

Whereweare

The Lull Before Asut-Tesoru...

It's been a rather quiet couple days here on the JR, as the drillers have been diligently drilling what will ultimately become a 200 m cased drill hole with an ROV landing pad on top, for future instrumentation and use as a venue for real-time measurements of the unusual upwelling fluids we encountered at Yinazao Seamount.

What is it that Geochemists do on the JR?

Geek Blog 1, from the summit of Yinazao: What IS the deal with Mariana Serpentinites?

OK - several blogs ago I promised to explain why this was THE Expedition I always wanted to be on, with the teaser that it had a lot to do with Serpentinite. 

Serpentinite, formally defined, is a rock made mostly of Serpentine, Serpentine is a common mineral formed during the metamorphism of olivine-rich rocks.

Yinazao Seamount, and the Perils of Drilling on Hillsides

Well, it took more than a day to get core on deck! 

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