Zircon as Magma Monitor

Chapter 1 Zircon as Magma Monitor Robust, Temperature-Dependent Partition Coefficients from Glass and Zircon Surface and Rim Measurements from Natural Systems Lily L. Claiborne, Lily L. Claiborne Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorCalvin F. Miller, Calvin F. Miller Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorGuillherme A. R. Gualda, Guillherme A. R. Gualda Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorTamara L. Carley, Tamara L. Carley Department of Geology and Environmental Geosciences, Lafayette College, Easton, PennsylvaniaSearch for more papers by this authorAaron K. Covey, Aaron K. Covey Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorJoseph L. Wooden, Joseph L. Wooden U.S. Geological Survey, Menlo Park, California, USASearch for more papers by this authorMarc A. Fleming, Marc A. Fleming Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this author Lily L. Claiborne, Lily L. Claiborne Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorCalvin F. Miller, Calvin F. Miller Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorGuillherme A. R. Gualda, Guillherme A. R. Gualda Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorTamara L. Carley, Tamara L. Carley Department of Geology and Environmental Geosciences, Lafayette College, Easton, PennsylvaniaSearch for more papers by this authorAaron K. Covey, Aaron K. Covey Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this authorJoseph L. Wooden, Joseph L. Wooden U.S. Geological Survey, Menlo Park, California, USASearch for more papers by this authorMarc A. Fleming, Marc A. Fleming Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee, USASearch for more papers by this author Book Editor(s):Desmond E. Moser, Desmond E. MoserSearch for more papers by this authorFernando Corfu, Fernando CorfuSearch for more papers by this authorJames R. Darling, James R. DarlingSearch for more papers by this authorSteven M. Reddy, Steven M. ReddySearch for more papers by this authorKimberly Tait, Kimberly TaitSearch for more papers by this author First published: 01 December 2017 https://doi.org/10.1002/9781119227250.ch1Citations: 13Book Series:Geophysical Monograph Series AboutPDFPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShareShare a linkShare onFacebookTwitterLinked InRedditWechat Summary Analysis of natural mineral/host glass pairs provides robust zircon-melt partition coefficients applicable to natural systems. We analyzed zircon rims (outer ~15 µm of grain interiors) or surfaces (1–2 µm deep pits on crystal faces) and glasses in tholeiitic, calc-alkaline, and alkaline dacites and rhyolites from diverse settings (continental extension, AZ-NV, USA; hot spot/spreading center, Iceland; continental arc, Mount St. Helens (MSH), WA, USA). MSH Kds are based on eruption-age surfaces with adhering glass, which should closely approach crystal-melt equilibrium. We parameterize trivalent rare earth element (REE) Kds by X*[Ti] y for Sm to Lu, Nb, Th, and U, where X = 2.5–3600 and y = −0.73 to −1.3 for Sm to Lu. Kds for all elements span more than an order of magnitude but are highly coherent. REE Kds fit lattice strain model parabolas well, and all Kds show strong negative correlations with T indicators. Useful Kds for zircon can be estimated from Tizircon-Kdelement correlations. MSH Kds based on surface analyses are consistent with those from conventional rim analysis. When paired with zircon ages, modeled compositions of MSH melts corroborate and strengthen previous conclusions regarding history and evolution of the MSH magmatic system through time. Citing Literature Microstructural Geochronology: Planetary Records Down to Atom Scale RelatedInformation