Results 81 to 90 of about 48,565 (249)
Geostandards and Geoanalytical Research, EarlyView.Key Points Higher laser repetition rate, fluence and larger spot size increase signal intensity. Higher laser repetition rate produces overlaps in aerosolised particles, improving signal stability and precision. For Sr‐rich materials, moderate spot diameter (≤ 60 μm), 3 J cm‐2 fluence and ≥ 12 Hz repetition rate are recommended.
Edafe O. Ominigbo +4 more
wiley +1 more source
, 2021 Table S1. LA-ICP-MS zircon U-Pb data of the metasedimentary rocks from the southern Huangling terrane, Yangtze craton. Table S2.
Jiang Xingfu
core +1 more source
Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook +38 more
wiley +1 more source
SC‐550: A Sintered Calcite Reference Material for In Situ U‐Pb Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points New calcite reference material (SC‐550) produced by high‐temperature and high‐pressure sintering of nano‐particulate powder from a microbial limestone. Homogeneous U content (2.3 ± 0.4 μg g‐1) and U‐Pb isotope ratios (< 0.6% RSD for 207Pb/206Pb; < 3% RSD for 238U/206Pb).
Lorenzo Tavazzani +7 more
wiley +1 more source
A Geologic Si‐O‐C Pathway to Incorporate Carbon in Silicates
Geophysical Monograph Series, Page 47-54., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Alexandra Navrotsky +2 more
wiley +1 more source
Recovery of zircon from investment casting molds [PDF]
"The Bureau of Mines conducted physical and chemical beneficiation studies on three samples of waste investment casting molds to devise a method to liberate and recover zircon.
core
Photomicrographs of sample FCT used to calculate alpha ejection corrections outlined in Zeigler & Baker et al., 2024; The Geometric Correction Method for zircon (U-Th)/He chronology: correcting systematic error and assigning uncertainties to alpha ...
Spencer Zeigler (18283123)
core +1 more source
, 2019 The structure of zircon, ZrSiO4 is modeled using interatomic potentials. The uranium end-member, coffinite (USiO4) and intermediate solid solutions of zircon and coffinite (UxZr1–xSiO4) are then modeled, allowing the prediction of lattice parameters as a
core +1 more source
Journal of Metamorphic Geology, EarlyView.ABSTRACT Zircon is a common, highly refractory accessory mineral found in sedimentary, igneous and metamorphic rocks that forms through various processes (e.g., magmatic, hydrothermal, metamorphic growth and recrystallization). Trace element compositions of detrital zircon have been widely applied to understanding tectonic processes and continental ...
Jarrod M. Burges +5 more
wiley +1 more source
Paramagnetic hole centres in natural zircon and zircon colouration
European Journal of Mineralogy, 2012 Paramagnetic defect centres and their relation to variable types of colouration were studied for eleven natural zircon crystals from three localities in North Carolina (USA), Massif Central (France), and Ural Mountains (Russia) using electron paramagnetic resonance (EPR) and optical absorption spectroscopy.
Mathias Klinger +4 more
openaire +1 more source