CESIMAR - CENPAT   25625
CENTRO PARA EL ESTUDIO DE SISTEMAS MARINOS
Unidad Ejecutora - UE
capítulos de libros
Título:
Soil Geomorphology Relationships in the Pichiñán Uraniferous District, Central Region of Chubut Province, Argentina
Autor/es:
PABLO JOSÉ BOUZA; OLGA PATRICIA DELL'ARCIPRETE; LINA VIDELA; CLUADIA LETICIA SAÍN; JULIO CÉSAR RÚA; ESTELA CORTÉS
Libro:
Advances in Geomorphology and Quaternary Studies in Argentina
Editorial:
Springer
Referencias:
Lugar: Cham; Año: 2017; p. 77 - 99
Resumen:
The aim of this work was to perform a baseline study about pedologic components of the geomorphic surfaces of different origins in a sector of Cerro Solo uranium ore deposit, situated in the arid central region of the Chubut province, Argentina. This contribution was requested by National Atomic Energy Commission of Argentina. The geomorphological units identified in the study area were: (1) Exhumed planation surfaces, composed of rounded hills of mesosiliceous-basic volcanic rocks of Middle Jurassic age; (2) Pedisediments, consisting of four Early Pleistocene alluvial terrace levels; (3) Pedimentassociation levels carved on the continental Cretaceous sediments; (4) Alluvial-fan relicts, with three geomorphic surfaces; (5) Modern alluvial-fans, composed of two coalescent alluvial fans, and (6) Alluvial plains and associated wetlands (mallines); these last ones are located in restricted areas where the water table is discharged at thalweg sectors of the channels. The soil parent materials free of carbonates (e.g., alluvial origin) their origin could be allochthonous, mainly by aeolian influx. These soils were classified as Calcids soil suborder, and their differences are due to the different development degree of calcretizationand polygenesis. The soils developed on pediments have a varied morphology and soil types depending on the age of geomorphic surface and the degree of polygenesis, this last resulting from the alternation of morphogenesis periods with pedogenic periods. The soils more developed were classified as Natrargids and Haplargids, while that the oldest were truncated and were classified as Haplocalcids. The soils of the younger level were classified as Torriorthens. The soils formed on alluvial plains were classifies as Torrifluvents.