Resumen de Cretaceous cooling along the Ghana transform margin: rapid denudation versus hydrothermal overprint
Apatite fission track data from the southern Ashanti Belt (Ghana) indicate a stable platform evolution of southern Ghana from Pan-African times to the late Mesozoic. A cooling stage commencing at ~130 Ma represents 1-3 km of basement denudation related to thermal uplift during intracontinental transform faulting between Africa and South America. The basement rocks of southern Ghana, and Early Cretaceous sediments from the Cote d ’lvoire-Ghana marginal ridge have similar cooling ages, indicating that cooling of the offshore marginal ridge is the consequence of coeval hydrothermal circulation within an intracontinental fault acting between African and Brazilian basements.
