The illite and organic matter archive of the Late Paleozoic–Mesozoic tectonothermal evolution of the Antarctic Peninsula

• DOI: 10.1144/jgs2024-164
• Publication Date: 2025-03-03T14:21:01Z
• Authors: Roberto A. Scasso; Sebastián Oriolo; Klaus Wemmer
• Keywords: Illite; Peninsula

This work presents new K-Ar and XRD illite data of Middle Jurassic sedimentary sequences (i.e., Mount Flora Camp Hill formations) the Antarctic Peninsula, providing a thermal evolution for Mesozoic tectonic history Peninsula adjacent regions. Samples Formation at Peninsula/Botany Bay yielded middle Permian to early Triassic ages, which are associated with upper lower anchizonal conditions, reflecting input detrital derived from Trinity Group. Maximum temperatures up ca. 175 °C constrained by vitrinite reflectance were achieved during Early Cretaceous burial Formation, contemporaneously magmatism. In contrast, samples show Late ages mainly related result hydrothermal processes linked coeval igneous intrusions. arc magmatism was coupled widespread activity, well-documented throughout northern South Shetland Islands.