It's been a great year with lots to celebrate as the school year comes to a close, some highlights include:
Nice article on exoplanet science out today that includes our work on making exoplanet mantle and magma compositions in the EPIC lab. Read it here!
EPIC celebrated a lot at the end of the 2016-2017 school year, including:
Congrats to everyone for all their hard work this year!
We're looking forward to a summer packed with adventures including logging a lot of experimental and analytical time, field work at Medicine Lake and Mt. Shasta volcanoes in Northern California with our MIT collaborators, participating and teaching the CIDER summer program at UC Berkeley, giving four presentations at IAVCEI 2017 in Portland, OR and much more.
Here are some pictures from recent adventures:
The EPIC lab was busy with great presentations and sessions at AGU this year!
Dr. Christy Till
Talk: “New Approaches for Identifying the P-T-X-t Histories and Eruption Triggers for Silicic Magmas; An Example Examining the Scaup Lake Rhyolite, Yellowstone Caldera, WY”
Meghan Guild, PhD candidate (third year)
Talk: “Stability of Aqueous Carbon Species in Subduction Zone Fluids” Talk
Kara Brugman, PhD candidate (third year)
Talk: “Clinopyroxene Diffusion Chronometry of the Scaup Lake Rhyolite, Yellowstone Caldera, WY” Talk
Hannah Shamloo, PhD student (second year)
Poster: “Petrologic Insights into the Triggering Mechanism for the Lava Creek Tuff Super-Eruption Yellowstone Caldera, WY” Poster, V23B-2979
Jamie Shaffer, Masters Student at New Mexico State, former EPIC research assistant
Poster: “New Temperature and H2O estimates for Post Caldera Yellowstone Rhyolite Lavas from Feldspar Geothermometry and Rhyolite-MELTS Modeling”
Dr. Kayla Iacovino, EPIC lab postdoc
Convening a VGP session V34C on volatiles in volcanic processes: “Fluids, Crystals, and Melts: The Role of Volatiles in Volcanic Processes from Mantle to Surface”
EPIC graduate student H. Shamloo's research on the Lava Creek Tuff super-eruption at Yellowstone was recently featured in an article in the publication EOS after following her poster presentation the December 2016 American Geophysical Union meeting. Check it out here: eos.org/articles/pinpointing-the-trigger-behind-yellowstones-last-supereruption
EPIC post-doc Dr. Kayla Iacovino recently had her reserach on Mt. Paektu in N. Korea featured in a number of news outlets inclduing the New York Times, Nature Magazine and NPR. More about it here!
We spent an exciting three weeks in Japan this summer doing field work, visiting collaborators at Kanazawa University, attending the Goldschmidt Conference and exploring Mt. Fuji geology.
Supported and motivated by our NSF grant (EAR #1447342) to explore subduction zone mantle wedge processes in exhumed Japanese peridotites, EPIC PhD Student Meghan Guild and EPIC PI Christy Till traveled to Japan this summer for a host of activities. First and foremost was our successful (and rainy!) field work in the Higashi-Akaishi peridotite on the Japanese island of Shikoku, which built upon our sampling trip there last summer. After that we were off to visit collaborator Dr. Tomoyuki Mizukami at Kanazawa University on the North coast of Japan, where we had great discussions, sample exchanges, giving talks on our research and an amazing seafood dinner. Then off to Goldschmidt, where both Meghan and Christy gave talks, meet with scientists in our field, and last but not least went on a field trip to explore the recent eruptive history of Mt. Fuji with the experts. It was an incredible three weeks, here's a few photos that give you a taste of the fun!
EPIC lab had a great time at the American Geophysical Union Fall Meeting this year. We were busy presenting as part of six abstracts and chairing three sessions, meeting others in our fields, and taking in the AGU and San Francisco experience - for the first time for a number EPIC members!
EPIC authors in bold
* = EPIC graduate student
^ = EPIC postdoc
K. Brugman*, C.B. Till, M. Bose and R. Hervig, 2015, Development of Clinopyroxene as an Igneous Geospeedometer Using NanoSIMS, EOS AGU Fall Meeting Abstract V31B-3030.
S. Cichy^, C. Till, K. Roggensack, R. Hervig, A. Clarke, Experimental Evidence for Fast Lithium Diffusion and Isotope Fractionation in Water-bearing Rhyolitic Melts at Magmatic Conditions, EOS AGU Fall Meeting Abstract V43C-3167
M. Coombs, J. Vazquez, L. Hayden, A. Calvert, M. Lidzbarski, N. Anderson, C. Till, 2015 (INVITED), Rejuvenation of shallow-crustal silicic magma bodies at Augustine and Hayes volcanoes, Alaska, EOS AGU Fall Meeting AbstractV42B-01
M. Guild*, C. Till, R. Hervig, S. Wallis, Boron Isotopic Compositions of High Pressure Hydrous Phases from the Slab-Mantle Wedge Interface, EOS AGU Fall Meeting Abstract V43A-3096
A. Rubin, K. Cooper, A. Kent, F.Costa Rodriguez, C. Till, 2015 (INVITED), Constraining timescales of pre-eruptive events within large silicic volcanic centers, EOS AGU Fall Meeting Abstract V23F-01
C. Till, J. Vazquez, J. Boyce, 2015 (INVITED), Setting a Stopwatch for Post-Caldera Effusive Rhyolite Eruptions at Yellowstone caldera, Wyoming, EOS AGU Fall Meeting Abstract V31G-03
We're incredibly proud of EPIC undergraduate researcher Eric Escoto, who was awarded the Dean's Medal from the College of Liberal Arts and Sciences at Arizona State University, the college's highest honor, upon graduation this December!
Dean’s Medalists awardees have "impressed their professors, schools and departments by going above and beyond in their academic careers. Through advanced coursework, innovative strives in research and impressive GPAs, these students will impact communities locally and internationally as they go on to develop themselves professionally."
You can find out more about Eric on our "People" page and more about his award here: https://sese.asu.edu/about/news/article/1108
Contributed by Meghan Guild with assistance from Kara Brugman.
Hello from the Experimental Petrology and Igneous processes Center (EPIC) at Arizona State University. In our lab, we study how magma forms by simulating pressures and temperatures of the Earth’s interior. Outside of the lab, we travel the world to study the various geologic settings we recreate everyday in the lab.
Visting A Paleo-Subduction Zone
In May 2015, I traveled to Japan, accompanied by Christy (Principal Investigator) and Michael (Lab Manager), to collect rock samples that would help me address fundamental questions about subduction zone processes and arc magma genesis. The rocks from the Higashi-akaishi peridotite that were once deep in a subduction zone but now sit exposed on the Earth’s surface at 1700m. Our steep and strenuous trek to the targeted outcrops essentially traced the path of the subducting slab into the mantle—a unique and generally inimitable experience. Our colleague, Tomoyuki Mizukami, from Kanazawa University, has a wealth of experience in this region and guided us to the high-pressure rocks. We were able to collect and carry ~100 kg of the densest rocks on Earth, which proved to be a challenge—but so worth it!
Visiting Active Volcanoes in Japan, Including Mount Aso (aka Aso-san)
After we parted ways with our Japanese colleagues we explored the volcanoes of the Japanese island arc. One of the largest and most active volcanoes in the world, Aso-san, lies in the center of Kyushu, Southern Japan. The Aso caldera is impressively large (25km north-south and 18 km east-west) and formed during a series of violently explosive pyroclastic volcanic eruptions between 270 ka and 90 ka years ago.
In comparison, the Yellowstone Caldera in Wyoming is about 45 by 85 km and experienced its last caldera-forming eruptions 631 ka. The pyroclastic eruptions that form calderas are particularly dangerous because of the amount of superheated ash and gases they release. After columns of gas and particulates are propelled into the stratosphere, the ash can circulate in the upper atmosphere for weeks and could affect global climate for years. These columns eventually collapse under their own weight into pyroclastic flows—fast-moving currents of hot tephra that rush down the sides of the volcano, destroying everything in their path. After this main eruptive phase, post-caldera eruptions can continue for hundreds of thousands of year, although at Yellowstone, these eruptions were generally less violent and the products were more traditional lavas instead of ash flows.
Post-caldera forming at Aso eruptions have been ongoing from 90 ka to present evidenced by the 17 visible volcanic cones found within the caldera walls. The active central cone of Aso caldera, Nakadake Volcano, has been erupting since 22 ka. The 1506 m high edifice is a composite cone composed of basaltic-andesite to basalt. We stayed at the base of Aso (nestled in the massive caldera). It was incredible to be surrounded by fresh volcanics and observe the periodic puff of gas and ash from Nakadake. Because of this small but persistent activity we were unable to get as close as we would have liked—something about volcanic gas emissions being toxic…
Of late, Nakadake has been relatively quiet until an unanticipated explosion at 09:43 (local time) on Monday September 14, 2015, which produced a column of ash that rose 2 km above the crater and subsequently collapsed into a small pyroclastic flow. The ash dispersal led to a number of flight cancellations but no one was hurt. I am sorry that we missed the eruption during our visit, but a landscape I observed only 3 months ago has already changed—and that is pretty awesome!
Eruption video: https://www.youtube.com/watch?v=yYS2JFWHT0c
You can keep an eye on the ongoing activity at Aso at this website: http://www.volcanodiscovery.com/aso/news.html.