First record of the Late Cretaceous denudation phase in the Admiralty Block (Transantarctic Mountains, northern Victoria Land, Antarctica)

摘要

Apatite fission-track analysis was performed on 13 granitoid samples of the Devonian Admiralty Intrusive Complex collected along two elevation profiles in the Admiralty Block, northern Victoria Land (NVL), East Antarctica. The sample age-elevation diagram shows a break in slope that indicates the presence of the Late Cretaceous phase of uplift and denudation already recognized in other sectors of NVL. Modeling of data suggests that the rocks may record also an Early Cenozoic pulse of denudation. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 11]