@misc{10481/82381,
year = {2023},
month = {4},
url = {https://hdl.handle.net/10481/82381},
abstract = {The opening of the Scotia Arc resulted in the final breakup of the land bridge between South
America and the Antarctic Peninsula. The South Orkney Microcontinent (SOM) constituted part of this former
connection and it is now the largest continental block in the Southern Scotia Arc. We present the first 3D
model of the SOM that, given its strategic position and characteristics, allows us to advance the knowledge of
the tectonic processes involved in the development of the Scotia Arc. Due to the scarcity of reliable geological
data, the initial approximation of the deep structure of the SOM was supported by the calculation of three main
geological boundaries from geophysical data: the acoustic basement, the boundary of the magnetic anomaly
source and the Moho depth. The 3D model was built, refined and validated by forward modeling and joint
inversion of gravity and magnetic data. We have accurately defined the geometry of the sedimentary cover,
determined the geometry of the intrusive igneous body causing the Pacific Margin Anomaly (PMA) and
mapped the heterogeneity of the crustal thickness. These structural features show a clear relationship to each
other and are consistent with an important E-W extension to the east of the SOM during early stages of the
Scotia Arc formation, prior to the opening of the Powell Basin.},
organization = {Spanish Government
	PRE2018-084612, CTM2017-89711-C2-1P, CTM2017-89711-C2-2P},
organization = {European Union through FEDER funds},
publisher = {Armer Geophysical Union},
title = {3D Geophysical and Geological Modeling of the South Orkney Microcontinent (Antarctica): Tectonic Implications for the Scotia Arc Development},
doi = {10.1029/2022TC007602},
author = {Morales-Ocaña, Cecilia and Escutia, Carlota and Galindo Zaldívar, Jesús},
}