Subduction zones display a rich diversity in magmatic, tectonic and metamorphic processes operating at a wide range of spatial and temporal scales. Viewed as major crust- recycling and -producing factories, their evolution has a great impact on the chemical composition and physical structure of the upper plate lithosphere that is subsequently involved in accretion and collisional orogens. Recent and ongoing study groups and international partnerships focused on a comprehensive suite of onshore/offshore records in subduction zone and exposed terranes preserved in orogens. They give a boost to our understanding of several aspects of supra-subduction dynamics, such as subduction initiation, timing of magmatism and accretion processes as well as their ultimate participation in continental crust production.

Understanding the evolution of lithosphere from subduction to collisional tectonics through Earth's history requires bringing together geoscientific communities across a wide range of disciplines and methods encompassing, amongst others: petrological, microstructural, geochemical and geochronological studies on solid rocks from exhumed and/or active settings (e.g., from IODP drilling), petrological experiments, geophysical studies on active subduction settings and new insights from recent advances in analogue and numerical geodynamic modelling. We thus invite the broadest possible range of thematic contributions dedicated to subduction zone and related collisional tectonics in order to:

(i) Characterize magmas and fluids transfers during subduction and their implications on upper plate lithosphere evolution,
(ii) Better understand mechanisms and timing of arc thickening and maturation (i.e. magmatic flare-ups, deep differentiation processes, deep crustal foundering, intra-arc deformation),
(iii) Examine the evolution of the nature and dynamics of supra-subduction zones from potential Archean records to recent observations,
(iv) Better assess the influence of subduction on the igneous evolution of orogenic belts especially during the collisional and post-collisional phases,
(v) Identify deformation mechanisms and structures of active subduction and collisional settings from seismic properties and magnetotelluric measurements,
(vi) Gathering the whole evidences to contribute to an integrated vision on modern arc systems from top to bottom, with special inputs from recent IODP expeditions in Western Pacific.