Morpho-bathymetry and surficial morphology of Udaeta Lake, along the Magallanes-Fagnano fault system, Tierra del Fuego, Argentina

ONORATO, M.R.; CORONATO, A.M; PERUCCA, L.; RABASSA, J.; LOPEZ, RAMIRO

JOURNAL OF SOUTH AMERICAN EARTH SCIENCES

PERGAMON-ELSEVIER SCIENCE LTD

Lugar: Amsterdam; Año: 2017 vol. 76 p. 1 - 10

0895-9811

The bathymetry and geomorphological characteristics of Udaeta Lake are herein presented. This lake islocated in the central-eastern portion of Isla Grande de Tierra del Fuego and it fills a structural depressionoriginated along a section of the Magallanes-Fagnano Fault System. Based on a bathymetric survey, thedepth data of the lake allowed for describing it by means of several morphometric parameters. UdaetaLake has an area of 159 ha, a perimeter of 4.911 m, and a maximum depth of 25.9 m. Two sub-basins canbe recognized within the Udaeta Lake: a large-size (ca. 953 1012 m), deep (25.9 m), and asymmetricbasin located to the east and a smaller (175 317 m), shallower (17 m) sub-basin to the west. The UdaetaLake is characterized as a geomorphologic feature of the Magallanes Fagnano Fault System, i.e. as anactive pull-apart basin. In this paper, we provide information that may help to the geomorphologicalcharacterization and interpretation of the neotectonic genesis of Udaeta Lake.