Wednesday, November 26, 2008

My research history, in time and P-T

I like Chris Rowan's idea of placing his research on a geologic time scale, so I stole his image and edited it:

Since I did some geochronology (actually, a major part of my PhD was explaining that it was impossible for my data to be meaningful), I felt like I should include the bad data as well as my preferred ages for events.

But the time scale doesn't have enough dimensions for my research, so here's version in pressure-temperature space.

All the green is actual data from Vermont. The blue arrow is supposed to represent my PhD work, except that the rocks were really lousy for finding any kind of data, and I didn't work on the low-pressure ones that told a better story. The red is Colorado, both my senior thesis and current work with senior thesis students. The yellow is one rock deformation experiment that a couple of my undergrad students in Vermont did one summer. And I figured if I was going to include the really low-pressure stuff, I ought to include the water quality stuff I've advised, but it doesn't really fit on the diagram.


kurt said...

What would a P-T-t path look like for your post-high school years (i.e., your life, not the rocks that you studied)?

Would that be a clockwise or counterclockwise metamorphic path?
Was there anatexis?

CJR said...

That's pretty cool. I did consider actually plotting my research in time and space. But I was lazy (a stereoplot of all the palaeomagnetic directions I've measured would probably just be a solid blob).

Kim said...

Chris - a paleolatitude (of research area) vs time (in your life) plot might work. (Also, less work and easier to explain than a stereoplot.)

Kurt - the question is, should high P/high T be good? "Pressure" and "stress" sound negative. And I don't want to touch "hot" as a metaphor. (Learned lessons from stoves as a kid, etc.)

A stress vs strain curve, now, that might be appropriate...

andrew said...

I can never remember how kbar translates to GPa or, more important, km depth.

Kim said...

The base of continental crust (~30 km) has a pressure around 10 kbars. (The exact relationship depends on the density of the rocks.)

Met pet people were just starting to switch to GPa when I was in grad school. But not enough people got jobs for the change to catch on, I think. (1 GPa is 10 kbar.)

BrianR said...

ha ... awesome!

Perry said...

Tip 'o my wide-brimmed field hat to you, Ms. H! I like your style.