@Article{CohenMcElZaSwAsSi:2015:SyMoAn,
author = "Cohen, Andrew and McGlue, Michael M. and Ellis, Geoffrey S. and
Zani, Hiran and Swarzenski, Peter W. and Assine, Mario L. and
Silva, Aguinaldo",
affiliation = "{University of Arizona} and {Energy Resources Program} and {Energy
Resources Program} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {U.S. Geological Survey} and {Universidade Estadual
Paulista (UNESP)} and {Universidade Federal de Mato Grosso do Sul
(UFMS)}",
title = "Lake formation, characteristics, and evolution in retroarc
deposystems: A synthesis of the modern Andean orogen and its
associated basins",
journal = "Memoir of the Geological Society of America",
year = "2015",
volume = "212",
pages = "309--335",
keywords = "Climatic conditions, Environmental signals, Forward propagation,
Geochemical characteristic, Rapid sedimentation, Sediment
generations, Sedimentation rates, Siliciclastic sediments.",
abstract = "Lake deposystems are commonly associated with retroarc mountain
belts in the geological record. These deposystems are poorly
characterized in modern retroarcs, placing limits on our ability
to interpret environmental signals from ancient deposits. To
address this problem, we have synthesized our existing knowledge
about the distribution, morphometrics, and sedimentary geochemical
characteristics of tectonically formed lakes in the central Andean
retroarc. Large, active mountain belts such as the Andes
frequently create an excess of sediment, to the point that
modeling and observational data both suggest their adjacent
retroarc basins will be rapidly overfilled by sediments. Lake
formation, requiring topographic closure, demands special
conditions such as topographic isolation and arid climatic
conditions to reduce sediment generation, and bedrock lithologies
that yield little siliciclastic sediment. Lacustrine deposition in
the modern Andean retroarc has different characteristics in the
six major morphotectonic zones discussed. (1) High-elevation
hinterland basins of the arid Puna-Altiplano Plateau frequently
contain underfilled and balanced-filled lakes that are potentially
long-lived and display relatively rapid sedimentation rates. (2)
Lakes are rare in piggyback basins, although a transition zone
exists where basins that originally formed as piggybacks are
transferred to the hinterland through forward propagation of the
thrust belt. Here, lakes are moderately abundant and long-lived
and display somewhat lower sedimentation rates than in the
hinterland. (3) Wedge-top and (4) foredeep deposystems of the
Andean retroarc are generally overfilled, and lakes are small and
ephemeral. (5) Semihumid Andean backbulge basins contain abundant
small lakes, which are moderately long-lived because of
underfilling by sediment and low sedimentation rates. (6) Broken
foreland lakes are common, typically underfilled, large, and
long-lived playa or shallow systems.",
doi = "10.1130/2015.1212(16)",
url = "http://dx.doi.org/10.1130/2015.1212(16)",
issn = "0072-1069",
language = "en",
urlaccessdate = "11 maio 2024"
}