UNCLASSIFIED - NON CLASSIFI? Dear colleagues, We would like to draw your attention to the Goldschmidt session 03i: Linking Deep Crustal Processes and the Timescales of Archean-Proterozoic Lithosphere Evolution (session in honor of Priyadarshi Chowdhury) at Goldschmidt, 12-17 July in Montreal, Canada. We invite you to contribute to this exciting session in honor of Priyadarshi Chowdhury, who received The Mineralogical Society of America Award for 2025. Abstract submission deadline is February 26, 2026 (23:59 ET/UTC-5). Details can be found here: https://conf.goldschmidt.info/goldschmidt/2026/cfp.cgi Keynote speaker: Taras Gerya Invited Speakers: Chris Yakymchuk, Ming Tang, Mahyra Tedeschi Session Description: The earliest stages of Earth's lithospheric evolution were marked by dynamic transitions in the nature of magmatism, metamorphism, and crust-mantle interactions that set the stage for long-term planetary habitability. Recent advances in petrology, geochemistry, diffusion chronometry, geochronology, microanalytical techniques, and numerical geodynamics now allow us to extract not only the thermochemical and mechanical conditions of the Earth's early lithosphere but also the timescales of heat, mass, and fluid transfer in high-temperature regimes, and to link these to the larger-scale geodynamic evolution of the Hadean-Archean-Proterozoic Earth. We invite contributions that address lithosphere dynamics on the early Earth. Priyadarshi Chowdhury's research has made high-impact contributions to first-order problems in lithosphere dynamics, and this honorary session will address key topics including: the chemical composition of continental crust across time, the rates, timing, and processes of early continental crust formation; the temporal character of tectonothermal events under hotter geotherms; the insights that metamorphic-magmatic timescales provide into evolving tectonic styles and thermal regimes and ultimately, the stabilization of felsic crust and cratons. We welcome contributions from researchers at all career stages and across diverse fields, including metamorphic and igneous petrology, isotope and trace element geochemistry, diffusion kinetics, geochronology, and geodynamic modelling. The session aims to foster interdisciplinary dialogue on the processes and tempos that shaped Earth's early evolution. Session conveners: Sumit Chakraborty, Jamie A. Cutts, Roberta L. Rudnick, Michael Brown Sincerely, Daniele Regis (on behalf of all conveners) Daniele Regis, Ph.D. (he/him/his) Section Head, Mineralogy and Sedimentology, MPP Leader Research Scientist, Geological Survey of Canada Natural Resources Canada / Government of Canada 601 Booth St., room 688, Ottawa, Ontario daniele.regis@nrcan-rncan.gc.ca<mailto:daniele.regis@nrcan-rncan.gc.ca> Cell: +1 343 549 6263 Lab website: https://navigator.innovation.ca/en/facility/natural-resources-canada/microbeam-mineralogy-laboratory-geoscience-and-exploration