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Showing 1 to 3 of 3 for “"Geochronometers"”.
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Evaluating the Usefulness of Geochronometers in the Packsaddle Domain for Refining the Timing of Metamorphism Via High-Resolution Petrography, Enchanted Rock State Natural Area, Llano Uplift, Texas
… analysis will consist of identifying geochronometers (e.g., zircon or monazite) and describing their relation to metamorphic and deformation textures (e.g., foliations, leucosomes, porphyroblasts). Identification of geochronometers and their geologic context allow for determination of …
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High-precision U/Pb geochronology of large igneous provinces and mass extinctions : testing coincidence and causation
… perovskite minerals as accurate, high-precision geochronometers on the mafic rocks that commonly characterize LIP magmas. These advances are coupled with the latest techniques in U/Pb geochronology to generate highprecision age models which are used to evaluate the relative timing of (1) the end- …
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⁴⁰Ar/³⁹Ar and U-Pb geochronological constraints on the thermal and tectonic evolution of the Connemara Caledonides, Western Ireland
… ages using higher resolution U-Pb and 40Ar/ 39Ar geochronometers. The results indicate that arc magmatism, sillimanite-grade metamorphism, anatexis, and late fluid infiltration spanned only about 12 million years. Cooling following the metamorphic peak was actually relatively rapid at 35*C/Ma …