Dear colleagues, We would like to invite you to submit an abstract to our session 3g Minor minerals, major implications: using accessory minerals to unravel the formation and evolution of Earth’s crust The session is part of theme 3 Earth's Lithosphere through Time: from Hadean to Modern at the 2021 Goldschmidt Conference (4-9 July) Keynote speaker: Emilie Bruand (Université Clermont Auvergne) Invited speaker: Chris Fisher (University of Western Australia) A description of the session is provided below and can be found here: https://2021.goldschmidt.info/goldschmidt/2021/meetingapp.cgi/Session/2101 Important date: 👉 26 February 2021: Abstract deadline We look forward to your contribution and hope to see you in Lyon or online! Inês Pereira, Martin Guitreau, Kathryn Cutts, Silvia Volante, Mahyra Tedeschi & Valby van Schijndel Minor minerals, major implications: using accessory minerals to unravel the formation and evolution of Earth’s crust [Theme 3; Session 3g] The formation and evolution of the Earth’s crust through time have been the subject of numerous studies over decades. Yet, several questions regarding the composition of Earth’s first crust, the evolution of the continental crust composition through time, the geodynamic processes involved, and the timing of continental crust growth, for instance, remain open. Improvements in analytical techniques, such as in-situ geochronology and geochemistry of accessory minerals (e.g., zircon, apatite, rutile, titanite, baddeleyite, monazite, garnet, pyrite, magnetite, etc.) have significantly contributed to advancing our understanding of crustal processes, by providing new insights into these overarching questions. In this session, we invite contributions that use the accessory mineral record for igneous, detrital and/or metamorphic applications, with an emphasis on solving key questions related to crust formation and secular evolution through time. We encourage contributions focusing on analytical studies of natural rocks and/or modelling using either the accessory mineral record or a combination of accessory mineral and whole-rock isotopic geochemistry, with a particular emphasis on novel and innovative approaches, although studies using more conventional approaches are also welcome.