Idioma:

Sedimentary stratigraphy of Lake Chalco (Central Mexico) during its formative stages

Martínez-Abarca, Rodrigo ; Ortega-Guerrero, Beatriz ; Lozano-García, Socorro ; Caballero, Margarita ; Valero-Garcés, Blas ; McGee, David ; Brown, Erik T. ; Stockhecke, Mona ; Hodgetts, Alastair G. E.

International journal of earth sciences : Geologische Rundschau, 2021-10, Vol.110 (7), p.2519-2539 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

Texto completo disponível

Citações Citado por

Enviar para

Título:
Sedimentary stratigraphy of Lake Chalco (Central Mexico) during its formative stages
Autor: Martínez-Abarca, Rodrigo ; Ortega-Guerrero, Beatriz ; Lozano-García, Socorro ; Caballero, Margarita ; Valero-Garcés, Blas ; McGee, David ; Brown, Erik T. ; Stockhecke, Mona ; Hodgetts, Alastair G. E.
Assuntos: Age ; Alluvial deposits ; Calcareous ooze ; Climate ; Climate variability ; Climatic conditions ; Composition ; Computational fluid dynamics ; Diatom ooze ; Diatoms ; Drilling ; Earth and Environmental Science ; Earth Sciences ; Eutrophic lakes ; Eutrophication ; Floodplains ; Geochemistry ; Geology ; Geophysics/Geodesy ; Gravel ; Identification ; Lacustrine sedimentation ; Lacustrine sediments ; Lake formation ; Lake sediments ; Laminar flow ; Magnetic permeability ; Magnetic properties ; Magnetic susceptibility ; Mineral Resources ; Mineralogy ; Mollusks ; Oozes ; Original Paper ; Physical characteristics ; Physical properties ; Pumice ; Quaternary ; Quaternary climates ; Sand ; Sediment ; Sediment composition ; Sediment transport ; Sedimentary facies ; Sedimentation ; Sedimentation & deposition ; Sedimentology ; Sediments ; Stratigraphy ; Structural Geology ; Terrestrial environments ; Volcanic activity ; Volcanism ; Water depth
É parte de: International journal of earth sciences : Geologische Rundschau, 2021-10, Vol.110 (7), p.2519-2539
Descrição: Lake Chalco lies south of the Basin of Mexico and has been the subject of studies related to Late Quaternary climate variability. In 2016, the International Continental Scientific Drilling Program “MexiDrill Project” recovered a 520-m sediment record from Lake Chalco. Magnetic susceptibility measurements revealed substantial changes in sediment physical properties between 343 and 285 m depth, suggesting changes in composition associated with fluctuations in the depositional environment. We targeted sediments in the 343–285 m interval for high-resolution facies analysis, to develop a model of Lake Chalco formation. We identified three facies associations, using sediment composition, texture, mineralogy and micro-morphological characteristics: (1) detrital facies, consisting of laminated silt, massive sand, stratified silty sand, clast-supported gravel and matrix-supported gravel; (2) biogenic facies, which include diatom ooze and bivalve coquina; and (3) volcaniclastic facies, represented by clast-supported pumice deposits. We propose that formation of Lake Chalco occurred in four stages, which we identified by changes in sediment characteristics. The first stage was an alluvial delta environment, in which debris and hyper-concentrated flows were the main sediment transport agents. The second was characterized by turbulent flows in a fluvial deltaic environment, which alternated with laminar flows associated with floodplains. The third stage was a time of fluvio-lacustrine transition in the basin, with formation of the previously identified Paleo-Chalco-I Lake, in response to wet conditions. During the fourth stage, a deep eutrophic lake formed (Paleo-Chalco-II), with an origin that appears to have been related to regional volcanism. Our working age-depth model indicates establishment of the lake at ca. 400 ± 46 ka. This paper presents the only available record of the transition from alluvial to lacustrine sedimentation of Lake Chalco. Our results allow us to establish (1) how the lake was formed and what the phases of its development were, (2) how a major volcanic event altered and transformed the lacustrine sedimentation, and (3) which climatic conditions dominated during the lake formation. The age for the onset of the lacustrine sedimentation in Chalco is for the first time constrained to around 400 ka. This enables to expand our knowledge of the climate for a time for which there is no information from terrestrial records of tropical North America.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

Voltar para lista de resultados

Anterior Resultado 10 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

Sedimentary stratigraphy of Lake Chalco (Central Mexico) during its formative stages

Martínez-Abarca, Rodrigo ; Ortega-Guerrero, Beatriz ; Lozano-García, Socorro ; Caballero, Margarita ; Valero-Garcés, Blas ; McGee, David ; Brown, Erik T. ; Stockhecke, Mona ; Hodgetts, Alastair G. E.

Berlin/Heidelberg: Springer Berlin Heidelberg

Buscando em bases de dados remotas. Favor aguardar.