Spanning approximately 358–252 Ma, the Late Paleozoic Ice Age (LPIA) was the most significant Phanerozoic glaciation across Gondwana. This study focuses on understanding the roles of astronomical forcings in glacio-sedimentation and environmental change during the Carboniferous–Permian transition in the Southern Carnarvon and Canning basins of Western Australia. Using gamma-ray logs from five wells, we analyzed sediment accumulation rates and identified cyclic depositional patterns driven by orbital eccentricity (∼405 kyr, ∼100 kyr) and obliquity (∼35 kyr). Astrochronological analysis established a high-resolution temporal framework, revealing twelve 405-kyr eccentricity cycles in the Gzhelian Stage, consistent with global sedimentary patterns. Geochemical analysis of redox-sensitive elements from Point Moody 1 well reveals three anoxic events, coinciding with sea-level rises at the Kasimovian–Gzhelian Boundary (∼303.7 Ma), in the early Late Gzhelian (∼301 Ma), and at or close to Carboniferous–Permian Boundary (∼298.9 Ma). These events suggest oxygen-depleted marine conditions were linked to deglaciation and warming phases. The dominance of eccentricity-paced cycles in glacial deposits underscore the significance of orbital forcing in controlling ice sheet dynamics and sedimentation. The comparable anoxic signatures in South China and South Africa indicate these environmental changes were globally synchronized during the Gzhelian. These findings provide the LPIA’s time frame in northeastern Gondwana, enhance global correlations of glacial and anoxic events, and provide insight into orbital controls on icehouse climates, with implications for paleoclimate modeling and the Earth’s climatic evolution.

Keywords