Graham Pearson and Linda R. Reid got the 2019 Norman L. Bowen prize at AGU’s autumn fulfilling 2019, conducted 9–13 December in bay area, Calif. The prize realizes “outstanding contributions with the sphere of volcanology, geochemistry, and petrology.”
By AGU 19 times ago
Citation for Graham Pearson
Graham Pearson merits the 2019 Norman L. Bowen honor for increasing the fundamental perception of igneous procedures into the upper mantle through studies of unstable stones, exhumed mantle parts, subcontinental mantle examples, and diamond jewelry along with their inclusions. Pearson keeps carried out the biggest scoop in mantle geochemical evolution with a study tool kit that extends from petrography, mineralogy, and petrology through steady isotopes, radiogenic isotopes, siderophile components, and spectroscopy. In using these method, Pearson has undertaken latest analytical way improvements that move the frontiers of diagnostic sensitiveness and consistency.
Colleagues will remember a long list of findings: big pieces of Earth’s mantle emplaced through the stone steadiness area;
eclogite xenoliths in kimberlite as Archean subducted oceanic crust; continental mantle keel age-match with overlying crust; Re-Os sulfide age-dating of single sulfide additions in diamonds; kimberlite derivation from one-of-a-kind mantle places; the Os isotopic imprint through the oceanic mantle of continental crust removal; trace aspect abundances in treasure expensive diamonds and source fingerprinting; an innovative subduction analog for Archean craton creation; and also the selecting, in a superdeep engagement, of the earliest terrestrial ringwoodite.
With this latter success, we see a good example of the reasons why Graham Pearson is specially worth the Bowen Award. He or she brought the effort to properly gauge the water information found in a smoothly metastable individual whole grain of ringwoodite whilst it was actually encased when you look at the diamonds as a result it could stay away from malfunction and thereby keep everyone of the initial water. In probably one of the most vital nutrient analyses ever made, Pearson and colleagues made it possible to reveal right which ringwoodite got more or less 1.5 wt percent drinking water. The first time, below is verification that the mantle changeover region may be wet.
In account of amount of money and number of his own advantages, you deservedly honor Graham Pearson for any large interdisciplinary influence of a task in learning the mantle in any way absolute depths.
—Steven B. Shirey, Carnegie Business for Art, Washington, D.C.
Impulse
Many thanks, Steve, for the most large and complementary phrase. Bless you and then to individuals who selected me personally involving this award. I am fairly humbled by your trust in me personally. You will find just a few things in accordance with Bowen: my own Canadian citizenship and your time put in on Carnegie business of Washington. I highly recommend both.
Your career was fortunate with a few lucky parties and worthwhile partnerships with more information on skilled people way too several to say but too crucial that you neglect. On entering school, i desired becoming a mining geologist—something we nevertheless imagine becoming if visiting engagement mines—but encouraging undergrad teaching by Bob Thompson at Imperial school diverted our road. Having two wonderful Ph.D. supervisors in Pete Nixon and Gareth Davies had been input pushing me personally to my means through lifestyle.
Pete’s transmittable desire for the mantle and his awesome 
particular stability is something to dream to.
Postdoc teachers with the stature, high quality, and generosity of Steve Shirey, Rick Carlson, Joe Boyd, and Chris Hawkesworth provided me with no excuse to be unsuccessful. After 15 satisfied years at Durham, I found myself attracted to Canada, exactly where Im blessed with truly supportive colleagues which create working at the college of Alberta an absolute enjoyment.
But i wish to end by emphasizing a variety of individuals that commonly do not get the financing the two should have. Without the devotion, excitement, and service associated with selection of clinical staff and tech support team i’ve been privileged to utilize through my profession, I would personally has developed little or no. So I’d choose to understand Geoff Nowell, Chris Ottley, Sarah Woodland, Yan Lou, and Chiranjeeb Sarkar, who, besides most of my own children and postdocs, and my favorite epic wife, Sam, actually get some point about this honor.
—Graham Pearson, School of Alberta, Edmonton, Ontario
Citation for Mary R. Reid
Martha Reid gets the Bowen Award to be with her inventive and ground breaking applying of zircon geochronology for learning energetic silicic magma systems. The lady 1997 paper in environment and Planetary practice characters, “Prolonged property time for that most youthful rhyolites associated with lengthy Valley caldera: 230 Th– 238 U ion microprobe matchmaking of younger zircons,” released a brand new division of query into magmatic activities, showing both diagnostic and mental system for conducting and interpreting the geochronology of youthful zircon by supplementary ion size spectrometry. Exclusive and innovative ideas on this papers changed our very own knowledge of the rate and processes taking part in magma shelves, boost, and emergence.
Linda utilized U–Th disequilibrium a relationship to indicate that zircons covered around the goods of an individual eruption
have centuries that duration tens to hundreds of kiloyears, implying a complex and protracted preeruption reputation for subvolcanic magmatic progression. Are the zircons creating the home age of melt-rich and possibly eruptible magma (the lady best understanding at that moment), or were zircons being reused from greatly solidified elements of a significantly much wider magma source? These issues in turn stimulated work by your modeling area to explore the environment necessary to look after melt-rich, silicic magma within these timescales and synchronous attempts to master the procedures and timescales of silicic melt segregation from crystal clear mush. Mary’s work subsequent to the 1997 document, both on her own together with the children, on longer pit, Yellowstone, together with the Youngest Toba Tuff, stand for together a tour de energy of information inside functions of large, harmful silicic magma devices. These reports, along with the several documents by more scientists using the lady techniques, has uncovered subvolcanic magma techniques to become dynamic, long-lived, and sophisticated situations. Linda Reid’s maintain silicic magma programs has had an enduring effect on the volcanology, geochemistry, and petrology farmland. The woman is deserving of the Bowen honor in every respect.
—Jonathan Miller, San Jose State School, San Jose, Calif.