<p>Atmospheric CO₂ is a key factor governing Earth’s habitability, with its concentration and isotopic variations influenced by both deep and shallow carbon cycles. The Neoproterozoic Era was pivotal for Earth’s habitability evolution and global tectonic reorganization, encompassing the assembly-to-breakup of Rodinia and the formation of Gondwana. During this period, marine carbonate δ¹³C_PDB exhibited repeated positive and negative excursions, with the most pronounced negative shift occurring in the Ediacaran (termed the Shuram Excursion, SE). While conventional models attribute SE to organic matter oxidation (due to its ¹³C-depleted signature), this mechanism faces challenges in explaining associated geological features. Notably, the SE event temporally coincides with peak rifting activity and large-scale carbonatite-alkaline magmatism, suggesting a potential deep carbon cycle contribution. Spatial-temporal-compositional correlations imply that tectonic and magmatic processes may play critical roles in carbonate δ¹³C excursions, necessitating an Earth system approach integrating deep-shallow carbon cycle. Recent studies propose that Neoproterozoic δ¹³C excursions could originate from deep carbon recycling, with models highlighting subduction-driven decarbonation and melt recycling during supercontinent cycles. These frameworks offer novel insights into the SE enigma.</p>