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Welcome to the American Mineralogist preprint page. Recently all preprints have been made open to all readers. These preprints are unedited manuscritps accepted for publication that will undergo copyediting, layout, and review of the proof before being published. Always consult the final, published document as a good practice. Remember to have your institution subscribe to American Mineralogist! Note that individual online subscriptions are via membership in MSA (and members get free online color in their paper) -- check out all the info via the pull-down links above including how to be an author and submit your paper.

All legal disclaimers that apply to the journal apply to these preprints. Please note that in almost all cases the authors hold the copyright. To identify those Open Access papers with a CC-BY or CC-BY-ND-NC license check the code at the end of the DOI.

The preprint is automatically deleted when the issue in which it appears is in print or posted online. While no corrections to these documents are possible, authors do have the right to contact editorial@minsocam.org to have the preprint removed if they would rather wait for publication.

Please cite these papers: Authors (Year) Title. American Mineralogist, in press. DOI.


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Uraninite from the Olympic Dam IOCG-U-Ag deposit: linking textural and compositional variation to temporal evolution Edeltraud Macmillan, Nigel J. Cook, Kathy Ehrig, Cristiana L. Ciobanu, and Allan Pring preprint

A Cr3+ luminescence study of spodumene at high pressures: Effects of site geometry, a phase transition and a level-crossing Earl O’Bannon III and Quentin Williams preprint

Non-hydrothermal origin of apatite in SEDEX mineralization and host rocks of the Howard’s Pass district, Yukon, Canada Michael G. Gadd, Daniel Layton-Matthews, and Jan M. Peter preprint

Metastable structural transformations and pressure-induced amorphization in natural (Mg,Fe)2SiO4 olivine under static compression: A Raman spectroscopic study David Santamaria-Perez, Andrew Thomson, Alfredo Segura, Julio Pellicer-Torres, Francisco J. Manjon, Furio Corà, Kit McColl, Mark Wilson, David Dobson, and Paul F. McMillan preprint

Crystal accumulation in a tilted arc batholith Calvin G. Barnes, Nolwenn Coint, and Aaron Yoshinobu preprint

Granitoid magmas preserved as melt inclusions in high-grade metamorphic rocks Omar Bartoli, Antonio Acosta-Vigil, Silvio Ferrero, and Bernardo Cesare preprint

Constraints on iron sulfate and iron oxide mineralogy from ChemCam visible/near infrared reflectance spectroscopy of Mt. Sharp basal units, Gale Crater, Mars Jeffrey R. Johnson, James F. Bell III, Steve Bender, Diana Blaney, Edward Cloutis, Bethany Ehlmann, Abigail Fraeman, Olivier Gasnault, Kjartan Kinch, Stéphane Le Mouélic, Sylvestre Maurice, Elizabeth Rampe, David Vaniman, and Roger C. Wiens preprint

Use of Multivariate Analysis for Synchrotron Micro-XANES Analysis of Iron Valence State in Amphiboles M. Darby Dyar, Elly A. Breves, Mickey E. Gunter, Antonio Lanzirotti, Jonathan M. Tucker, Cj Carey, Samantha E. Peel, Elizabeth B. Brown, Roberta Oberti, Mirna Lerotic, and Jeremy S. Delaney preprint

On the nature and significance of rarity in mineralogy Robert M. Hazen and Jesse H. Ausubel preprint

Probing carbon-bearing species and CO2 inclusion in amorphous carbon-MgSiO3 enstatite reaction products at 1.5 GPa: Insights from 13C high-resolution solid-state NMR Eun Jeong Kim, Yingwei Fei, Sung Keun Lee preprint

Computational study of pressure behaviour to 6 GPa of the 2M1 muscovite-paragonite series N. Hernández-Haro, D. Muñoz-Santiburcio, C. Pérez Del Valle, J. Ortega-Castro, C. I. Sainz-Díaz, C. J. Garrido, and A. Hernández-Laguna preprint

Equation of state and spin crossover of (Mg,Fe)O at high pressure Natalia V. Solomatova, Jennifer M. Jackson, Wolfgang Sturhahn, June K. Wicks, Jiyong Zhao, Thomas S Toellner, Bora Kalkan, and William M. Steinhardt preprint

Elasticity and Phase Transformation at High Pressure in Coesite from Experiments and First-Principles Calculations Ting Chen, Xuebing Wang, Xintong Qi, Maining Ma, Zhishuang Xu, and Baosheng Li preprint

Majindeite, Mg2Mo3O8, a new mineral from the Allende meteorite and a witness to post-crystallization oxidation of a Ca-Al-rich refractory inclusion Chi Ma and John R. Beckett preprint

A single-crystal X-ray and Raman spectroscopic study of hydrothermally synthesized arsenates and vanadates with the descloizite and adelite structure types Tamara Đorđević, Uwe Kolitsch, and Lutz Nasadala preprint

The elastic tensor of monoclinic alkali feldspars Naëmi Waeselmanna, J. Michael Browna, Ross J. Angel, Nancy Ross, Jing Zhao, and Werner Kaminskyd preprint

Oxygen isotope thermometry reveals high magmatic temperatures and short residence times in Yellowstone and other hot-dry rhyolites compared to cold-wet systems Matthew W. Loewen and Ilya N. Bindeman preprint

(FeH)1-xTixO2: a new water carrier to the mantle transition zone Tatsuhiko Kawamoto preprint

Understanding magmatic processes at Telica volcano, Nicaragua: Crystal size distribution and textural analysis Molly Witter, Tanya Furman, Peter LaFemina, and Maureen Feineman preprint

Solution-Chemistry Control of Mg2+-Calcite Interaction Mechanisms: Implication for Biomineralization Jie Xu, Jianhua Wang, Mina Hong, and H. Henry Teng preprint

“Satellite monazites” in polymetamorphic basement rocks of the Alps: their origin and petrological significance Fritz Finger, Erwin Krenn, Bernhard Schulz, Daniel Harlov, and David Schiller preprint

Equation of state of pyrite to 80 GPa and 2400 K E.C. Thompson, B.A. Chidester, R.A. Fischer, G.I. Myers, D.L. Heinz, V.B. Prakapenka, and A.J. Campbell preprint

Elastic wave velocities in polycrystalline Mg3Al2Si3O12-pyrope garnet to 24 GPa and 1300K Julien Chantel, Geeth M. Manthilake, Daniel J. Frost, Christopher Beyer, Tiziana Boffa Ballaran, Zhicheng Jing, and Yanbin Wang preprint

A petrological assessment of diamond as a recorder of the mantle nitrogen cycle Sami Mikhail and Daniel Howell preprint

Thermochemistry of Rare Earth Perovskites Na3xRE0.67-xTiO3 (RE = La, Ce) Dawei Feng, Pardha Saradhi Maram, Aleksandra Mielewczyk-Gryń, and Alexandra Navrotsky preprint

Crystal structure of a new compound, CuZnCl(OH)3, isostructural with botallackite Hexing Yang, Isabel F. Barton, Marcelo B. Andrade, and Robert T. Downs preprint

Thermodynamics of Bastnaesite - a Major Rare Earth Ore Mineral Radha Shivaramaiah, Andre Anderko, Richard E. Riman, and Alexandra Navrotsky preprint

Rates and Styles of Planetary Cooling on Earth, Moon, Mars and Vesta, Using New Models for Oxygen Fugacity, Ferric-Ferrous Ratios, Olivine-liquid Fe-Mg Exchange, and Mantle Potential Temperature Keith Putirka preprint

Degassing of hydrous trachytic Campi Flegrei and phonolitic Vesuvius melts: Experimental limitations and chances to study homogeneous bubble nucleation Oliver Preuss, Holger Marxer, Sarah Ulmer, Johannes Wolf, and Marcus Nowak preprint

Amphibole thermometers and barometers for igneous systems, and some implications for eruption mechanisms of felsic magmas at arc volcanoes Keith Putirka preprint

Chromium, vanadium, and titanium valence systematics in solar system pyroxene as a recorder of oxygen fugacity, planetary provenance, and processes James J. Papike, Steven B. Simon, Paul V. Burger, Aaron S. Bell, Charles K. Shearer, and James M. Karner preprint

Exploring the potential of Raman spectroscopy for crystallochemical analyses of complex hydrous silicates: II. Tourmalines Anke Watenphul, Martina Burgdorf, Jochen Schlüter, Ingo Horn, Thomas Malcherek, and Boriana Mihailova preprint

An advanced rotational rheometer system for extremely fluid liquids up to 1273 K and applications to alkali carbonate melts Danilo Di Genova, Corrado Cimarelli, Kai-Uwe Hess, and Donald B. Dingwell preprint

Carbon mineral ecology: Predicting the undiscovered minerals of carbon Robert M. Hazen, Daniel R. Hummer, Grethe Hystad, Robert T. Downs, and Joshua J. Golden preprint

Experimental temperature cycling as a powerful tool to enlarge meltpools and crystals at magma storage conditions Martin Erdmann and Jürgen Koepke preprint

Crystal/melt partitioning of water and other volatiles during the near-solidus melting of mantle peridotite: comparisons with non-volatile incompatible elements and implications for the generation of intraplate magmatism John. Adam, Michael Turner, Erik H. Hauri, and Simon Turner preprint

Experimental formation of pyroxenite veins by reactions between olivine and Si, Al, Ca, Na and Cl-rich fluids at 800 ºC and 800 MPa; implications for fluid metasomatism in the mantle wedge Thomas B. Grant, Daniel E. Harlov, and Dieter Rhede preprint

Association of rocks with different P-T paths within the Barchi-Kol UHP terrain (Kokchetav Complex): Implications for subduction and exhumation of continental crust Aleksandr S. Stepanov, Daniela Rubatto, Joerg Hermann, and Andrey V. Korsakov preprint

Iron-titanium oxyhydroxides as water carriers in the Earth’s deep mantle Yu Nishihara and Kyoko N. Matsukage preprint

Crystallographic orientation relationships in host–inclusion systems: new insights from large EBSD datasets Thomas A. Griffiths, Gerlinde Habler, and Rainer Abart preprint

Models for the estimation of Fe3+/Fetot. ratio in terrestrial and extra terrestrial alkali- and iron-rich silicate glasses using Raman spectroscopy Danilo Di Genova, Kai-Uwe Hess, Magdalena Oryaëlle Chevrel, and Donald B. Dingwell preprint

Temperature dependences of the hyperfine parameters of Fe2+ in FeTiO3 as determined by 57Fe-Mössbauer spectroscopy Antoine Van Alboom and Eddy De Grave preprint

Dynamics and thermodynamics of magma mixing: Insights from a simple exploratory model Frank J. Spera, Jason S. Schmidt, Wendy A. Bohrson, and Guy A. Brown preprint

In-situ infrared spectroscopic studies of hydroxyl in amphiboles at high pressure Elizabeth C. Thompson, Andrew J. Campbell, and Zhenxian Liu preprint

Magnetite spherules in pyroclastic iron ore at El Laco, Chile Jan Olov Nyström, Fernando Henríquez, José A. Naranjo, and H. Richard Naslund preprint

Reflectance Spectroscopy of Chromium-bearing Spinel with Application to Recent Orbital Data from the Moon K.B. Williams, C.R.M. Jackson, L.C. Cheek, K.L. Donaldson Hanna, S.W. Parman, C.M. Pieters, M.D. Dyar, and T.C. Prissel preprint

Accurate predictions of iron redox state in silicate glasses: A multivariate approach using x-ray absorption spectroscopy M. Darby Dyar, Molly Mccanta, Elly Breves, Cj Carey, and Antonio Lanzirotti preprint

On Silica-Rich Granitoids and their eruptive equivalents Carol D. Frost, B. Ronald Frost, and James S. Beard preprint

Equation of state of the high-pressure Fe3O4 phase and a new structural transition at 70 GPa Angele Ricolleau and Yingwei Fei preprint

Geochemistry, petrologic evolution, and ore deposits of the Miocene Bodie Hills Volcanic Field, California and Nevada Edward A. du Bray, David A. John, Brian L. Cousens, Leslie A. Hayden, and Peter G. Vikre preprint

Crystal chemistry of spinels in the system MgAl2O4-MgV2O4-Mg2VO4 Ferdinando Bosi, Henrik Skogby, Rosa Anna Fregola and Ulf Hålenius preprint

W-WO Joins the Deep Earth Electrochemical Series Abby Kavner preprint

Petrographic Investigation of Smithing Slag of the Hellenistic to Byzantine city of Sagalassos (SW-Turkey) Kim Eekelers, Patrick Degryse, and Philippe Muchez preprint

Confined Water in Tunnel Nanopores of Sepiolite: Insights from Molecular Simulations Jinhong Zhou, Xiancai Lu, and Edo S. Boek preprint

Compositional variation of apatite from rift-related alkaline igneous rocks of the Gardar Province, South Greenland Sara Ladenburger, Michael A.W. Marks, Brian Upton, Peter Hill, Thomas Wenzel, and Gregor Markl preprint

Constraints on the early delivery and fractionation of Earth’s major volatiles from C/H, C/N, and C/S ratios Marc M. Hirschmann preprint

Zircon saturation and Zr diffusion in rhyolitic melts, and zircon growth geospeedometer Youxue Zhang and Zhengjiu Xu preprint

Octahedral chemistry of 2:1 clay minerals and hydroxyl band position in the near-infrared. Application to Mars Javier Cuadros, Joe R. Michalski, Vesselin Dekov, and Janice L. Bishop preprint

Multi-stage barite crystallization in partially melted UHP eclogite from the Sulu belt, China Songjie Wang, Lu Wang, Michael Brown, and Peng Feng preprint

Radiation damage in biotite mica by accelerated α-particles: a synchrotron microfocus X-ray diffraction and X-ray absorption spectroscopy study William R. Bower, Carolyn I. Pearce , Andrew D. Smith, Simon M. Pimblott , J. Frederick W. Mosselmans, Sarah J. Haigh, James P. Mckinley, and Richard A.D. Pattrick preprint

Remanent magnetization, magnetic coupling and interface ionic configurations of intergrown rhombohedral and cubic Fe-Ti oxides: a short survey Peter Robinson, S.A. McEnroe, Nobuyoshi Miyajima, Karl Fabian, and Nathan Church preprint

Recognizing sulfate and phosphate complexes chemisorbed onto nanophase weathering products on Mars using in-situ and remote observations Elizabeth B. Rampe, Richard V. Morris, P. Douglas Archer, Jr., David G. Agresti, and Douglas W. Ming preprint

Quartz-apatite rocks from the Tundulu and Kangankunde carbonatite complexes, Malawi: evidence for dissolution-reprecipitation of apatite and preferential LREE mobility in late-stage hydrothermal processes Sam Broom-Fendley, Mike T. Styles, J. Don Appleton, Gus Gunn, and Frances Wall preprint

Time’s Arrow in the Trees of Life and Minerals Peter J. Heaney preprint

The Lassen Hydrothermal System Steven E. Ingebritsen, Deborah Bergfeld, Laura E. Clor, and William C. Evans preprint

A Century Of Mineral Structures: How Well Do We Know Them? Ross J. Angel and Fabrizio Nestola preprint

The validity of plagioclase-melt geothermometry for degassing-driven magma crystallisation Madeleine C. S. Humphreys, Marie Edmonds, and Marthe S. Klöcking preprint

Glass structure, melt structure and dynamics: some concepts for petrology Jonathan F. Stebbins preprint

Are Covalent Bonds really Directed? I. David Brown preprint