Print Email Facebook Twitter Novel insights into the geological architecture and evolution of Antigua, a key area for Caribbean geodynamics, paleogeography, and paleobiology Title Novel insights into the geological architecture and evolution of Antigua, a key area for Caribbean geodynamics, paleogeography, and paleobiology Author Brons, B. Project Molengraaff Fonds Date 2019 Abstract Understanding the strain distribution along the Lesser Antilles is essential, because they form a seismic active region. The objective of this thesis is to pave the way for such understanding by providing new insights on the geological architecture and evolution of Antigua, a key area for Caribbean geodynamics, paleogeography and paleobiology. Structural data, lithological data, and rock samples were collected during fieldwork and thin sections were prepared and analyzed. Here we provide a revised geological map, geological reconstruction, stratigraphy and the first ever detailed cross sections of Antigua. Furthermore, this study shows evidence for at least two deformation phases. The first phase is oblique compressional, causing N130 striking fold axes and thrust fault planes. The second phase is oblique extensional with N120 striking normal faults, deforming the island like a tilted fault block model and causing a general NE dip of the formations of Antigua. Moreover, this thesis also shows a tectonic control on dyke orientations. A novel subdivision and revised depositional age range of the Antigua Group is proposed, providing new implications on the evolution of Antigua. Additionally, our study shows significant and useful exposure locations and newly discovered features like stylolites. By making novel contributions to the geology of Antigua and thus providing possibilities for future paleo stress, paleomagnetic and paleobiological studies, this thesis shows that Antigua is a key area in the research on strain partitioning and evolution of the Lesser Antilles. To reference this document use: http://resolver.tudelft.nl/uuid:d5872ecc-d8a4-4d06-8629-4a5735726dd4 Publisher Utrecht University Part of collection Geoscience Reports Document type report Rights (c) the author Files PDF Brons (2019).pdf 7.39 MB Close viewer /islandora/object/uuid:d5872ecc-d8a4-4d06-8629-4a5735726dd4/datastream/OBJ/view