Darryl E. Granger William E. Odom Brody Conner Lan Luo Xianmei Huang 2025 <p><i>In situ</i><span>-produced&nbsp;</span>¹⁰<span>Be in quartz is widely used to constrain exposure ages and denudation rates, traditionally measured in sand-sized grains. Here we report a new method for isolating fine-grained quartz from shale and demonstrate its reliability for grain sizes down to single microns. Sequential dissolution tests and analyses of grain size separates show that meteoric&nbsp;</span>¹⁰<span>Be is eliminated and that recoil losses during cosmogenic nuclide production are balanced by implantation from other mineral grains. High-temperature combustion leads to diffusion of meteoric&nbsp;</span>¹⁰<span>Be into fine-grained quartz and must be used with caution.</span></p> application/pdf 10.1016/j.nimb.2025.165913 en Elsevier Measurement of in situ-produced cosmogenic nuclides in fine-grained quartz from shale article