Multi-proxy evidence for subduction of the Neoproterozoic Adamastor Ocean and Wilson cycle tectonics in the South Atlantic Brasiliano Orogenic System of Western Gondwana

•Field, petrographic, geophysical, chronological, elemental, isotopic evidence of a Wilson cycle in the Adamastor ocean realm.•Full oceanic cycle spatio-temporal distribution of rift, passive margin and orogenic basins, MORB/SSZ ophiolites, arc rocks.•Coherent succession of petrologically distinct subduction, collisional and post-collisional igneous suites over 150 Myrs.•Subduction polarity reversal model for Tonian-Cryogenian island arcs followed by Ediacaran continental-margin (Andean) arcs.•Scissor-shaped oceanic basin leads to connected inverted aulacogen/subduction-collision/complex accretionary orogen system. Field, petrographic, geophysical, geochronological, elemental and isotopic data support the identification of distinct components of a Wilson cycle (rift-drift-subduction-collision-collapse) in the South Atlantic Brasiliano Orogenic System (Mantiqueira Province). The main lines of evidence are: 1) Tonian-Cryogenian ophiolite complexes; 2) Hundreds of Hf-Nd-Sr isotope determinations indicating a temporal trend of juvenile to mixed Tonian-Cryogenian-Ediacaran igneous rocks comprising expanded calc-alkaline, magnesian, metaluminous gabbro-tonalite-granodiorite-granite/basalt-dacite-andesite-rhyolite series, developed in island arcs and in continental-margin (Andean-type) arcs; 3) Cratonic-sourced conglomerate-diamictite-sandstone-pelite-carbonate successions deposited in Tonian-Cryogenian rift-passive margins fringing the paleocontinental borders, covered by orogenic basins with contrasting provenance from the arc systems; 4) Paired negative-positive Bouguer anomalies typical of suture zones with ophiolite-bearing accretionary prisms in the lower plate and arc systems in the upper plate; 5) Paired HP/HTmetamorphic belts associated with Ediacaran suture zones and retro-eclogites associated with Tonian subduction. Proposed intracontinental models for this region, both original and revisited, are based on the visual interpretation of restricted space for an oceanic realm and rely on calculations using presumed spreading and subduction rates. However, those do not account for a number of pre-, syn- and post-collisional modifications of the original paleogeography and for plate configurations over a curved planetary surface, with asynchroneity of extensional, accretionary and collisional events over thousands-of-km long orogenic fronts. Scissor-shaped oceanic basins are the rule rather than the exception, with connection of (i) an aulacogen to (ii) a pa