Tectonic Evolution of the Grenville Province
Summary
The Grenville Province records one of the most extensive Mesoproterozoic orogenic belts, marking the assembly of the supercontinent Rodinia. Spanning from ca 1.3 Ga to 0.98 Ga, this orogeny involved successive accretion of arc systems, basin formation, high-grade metamorphism and final continent–continent collision. The western margin of Laurentia saw the growth of ocean-facing arc terranes that accreted onto older Archean and Paleoproterozoic crust, forming a broad polyphase orogenic wedge. Sedimentary basins developed in parautochthonous domains collected detrital zircon populations that record evolving source regions from Superior Province basement to juvenile Grenvillian arcs. Subsequent collisional events drove crustal thickening, peak granulite-facies metamorphism and widespread magmatism between 1.05 and 0.99 Ga. Major structural subdivisions—the Allochthonous, Parautochthonous and Inner Metasedimentary belts—preserve a gradient from deeply buried high-grade rocks to lower-grade foreland sequences. Isotopic signatures reveal repeated reworking of older crust and pulses of juvenile addition, reflecting both subduction-related growth and intracrustal recycling. Following peak metamorphism, extensional collapse and thermal relaxation gave rise to anorogenic magmatism and basin inversion. The Grenville Province thus offers a natural laboratory for understanding long-lived convergent margins, protracted orogeny and supercontinent dynamics. Its preserved archives of sediment provenance, metamorphic trajectories and structural architecture underpin global models of continental growth, provide analogues for modern-day orogenic belts and guide exploration for metamorphic-hosted mineral deposits.
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Tectonic Evolution of the Grenville Province publication trend
The graph below shows the total number of articles in tectonic evolution of the grenville province across all publications each year (not limited to Nature Index journals).
Technical terms
Orogeny: A mountain-building episode driven by plate convergence, involving deformation, metamorphism and magmatism.
Detrital zircon: Zircon grains eroded from source rocks and deposited in sedimentary basins, used for dating provenance and tectonic events.
Isotopic mapping: The use of spatial variations in radiogenic isotope ratios to delineate crustal terranes and infer tectonic processes.
Suture: A structural zone marking the boundary between colliding crustal blocks during orogeny.
Parautochthonous: Rock units displaced only a short distance from their original position, typically along the orogenic front.
References
- Crustal evolution of the Laurentian continental margin from the Paleo- through Mesoproterozic: A zircon U–Pb and Hf transect through the western Grenville Province, Ontario, Canada. Precambrian Research (2023).
- The Pre-Grenvillian assembly of the southeastern Laurentian margin through the U–Pb–Hf detrital zircon record of Mesoproterozoic supracrustal sequences (Central Grenville Province, Quebec, Canada). Geological Magazine (2021).
- Pb Isotope Mapping of Paleoproterozoic Gneisses in the SW Grenville Province: Evidence for a Cryptic Continental Suture. Geosciences (2018).
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