European Geosciences Union (EGU) General Assembly

Date: Sunday, May 3, 2026 — Friday, May 8, 2026

Web: https://www.egu26.eu/

Includes the following sessions:

GMPV7.1 Deep roots, global reach: origin, anatomy and impact of Large Igneous Provinces from mantle to surface

Convenors: Sara Callegaro (s.callegaro@unibo.it), Isabel Fendley (ifendley@psu.edu), Sverre Planke (sverre.planke@geo.uio.no), Kim Senger (kim.senger@unis.no)

Large Igneous Provinces (LIPs) represent outstanding expressions of voluminous melt production in the mantle and subsequent rapid lithospheric magma transport and crustal emplacement. Their build-up requires a wealth of interrelated mantle and crustal processes within the lithosphere, including continental extension and breakup, lower and upper crustal assimilation and differentiation of the magma, and the origin of new continental and oceanic crust by emplacement of either intrusive or extrusive complexes. The formation of LIPs is increasingly recognised as playing a pivotal role on crust–mantle mass transfer, the localisation of critical mineral deposits, and massive volatile release and associated global climate change. The development of these provinces is, however, not well constrained, including the tempo and magnitude of melt generation, magma transport and emplacement mechanisms, magma-lithosphere interaction processes at different depths, and the physical volcanology including volatile transfer pathways and fluxes. This session seeks contributions that dissect the physical and chemical processes governing the generation, emplacement, and evolution of LIPs, including volcanic rifted margins, across scales from mantle melting dynamics to surface expressions, from magma chamber processes to the emplacement styles of lava piles and seaward dipping reflectors. We particularly encourage studies combining high-resolution geochronology, petrology, isotopic and trace-element geochemistry, geophysical imaging, numerical/analogue modelling, and environmental proxy records.

GMPV7.2 Fluctuations of magmatic activity in hotspots and large igneous provinces, origins, temporality, and consequences on biogeography

Convenors: Vincent Famin (vfamin@univ-reunion.fr), Maelis Arnould (maelis.arnould@univ-lyon1.fr)

Hotspots and large igneous provinces (LIPs) display marked fluctuations in magma supply, composition, and eruptive temporality—from million-year pulsing to the timescale of eruptions—yet the origins of this variability remain debated and their consequences are poorly studied. This session explores how mantle dynamics (e.g., plume pulsations, plume–ridge interaction, lithospheric architecture) and crustal processes (storage, recharge, assimilation) generate temporal patterns in magmatism, and how these patterns propagate to Earth’s surface systems and biota. We welcome contributions that integrate numerical modeling (from the scale of mantle processes that can affect the source location and the timing of magmas, to those of melt transport), as well as case studies on specific hotspots tracks, continental and oceanic LIPS, and rifted margins including new geochronology, stratigraphy, petrological, geochemical, and isotopic constraints. We also welcome contributions linking magmatic pulsations to environmental and biogeographic change—e.g., climatic perturbations, nutrient fluxes, habitat creation and fragmentation, island and seamount corridor dynamics, and macroevolutionary turnovers. The goal of this session is to build a mechanistic framework for the temporality of hotspot/LIP magmatism and to quantify its cascading effects on plate tectonics, ecosystems, and biogeographic patterns through Earth history.

Geological Association of Canada/Mineralogical Association of Canada (GAC-MAC) Joint Annual Meeting

Date: Monday, May 25, 2026 — Thursday, May 28, 2026

Web: https://event.fourwaves.com/stjohns2026/pages

Includes the following special sessions:

SS21 Large Igneous Provinces: the bigger picture

Convenors: Steven Denyszyn (steven.denyszyn@uwa.edu.au), Gregory Shellnutt (jgshelln@ntnu.edu.tw)

Large igneous provinces (LIPs) represent large volumes of mantle-derived magmatism and its geochemical derivatives. They are commonly hosts of magmatic mineral deposits, and are excellent recorders of geochronological, geochemical, and geophysical (including paleomagnetic) information. In this session, we present new contributions to the field of LIP research, including broader-scale geological processes that accompany LIP magmatism (pre-, syn-, and post-emplacement). These include, but are not limited to, exploration of plumbing systems in the lower crust, timing and rates of magmatism, interaction with host rocks, environmental effects, mantle melting processes, metallogeny, and geodynamics (including paleocontinental reconstruction).

SS22 Exploring the magmatic framework of continental large igneous provinces and their Ni-Cu-PGE prospectivity: a special session honoring the contributions of W R A Baragar

Convenors: Marie-Claude Williamson (marie-claude.williamson@nrcan-rncan.gc.ca), Brian O’Driscoll (brian.odriscoll@uOttawa.ca), Simon Jowitt (sjowitt@unr.edu)

Continental Large Igneous Provinces (LIPs) are high volume, intraplate magmatic events that consist of flood basalts, gabbro sills and dykes, ± layered intrusions. Most LIPs are emplaced over a time span of ~50 My or less, and there is strong evidence that the flood basalt volcanism occurs over even shorter time intervals (<1-2 My). LIPs are economic targets because magmatic sulphides may be trapped in feeder dykes and sills associated with the overlying flood basalts. Each LIP is unique but a detailed knowledge and comparison of each element of the magmatic architecture informs exploration strategies for Ni-Cu-PGEs. This session honors the pioneering work of Bob Baragar, whose groundbreaking research in volcanology and igneous petrology has deepened our understanding of Proterozoic and Phanerozoic LIPs. Through decades of meticulous mapping, coupled with petrological and geochemical insights, Bob has profoundly influenced how we reconstruct the architecture of large-scale mafic-ultramafic systems—from layered intrusions to flood basalts and the associated dykes and sills. We invite contributions across a wide range of disciplines including but not limited to: geochronology, volcanology, igneous petrology, geochemistry, geophysics, economic geology and remote sensing, with a special emphasis on the Mackenzie Large Igneous Province in Nunavut.

Large Igneous Province — International Dyke Conference

Date: Monday, August 3, 2026 — Friday, August 7, 2026

Web: https://lipidc9.sciencesconf.org/

Contact: lipidc9@sciencesconf.org