Article (Scientific journals)
Environmental significance of kaolinite variability over the last centuries in crater lake sediments from Central Mexico
Fagel, Nathalie; Israde-Alcántara, Isabel; Safaierad, Reza et al.
2024In Applied Clay Science, 247, p. 107211
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Keywords :
Geochemistry and Petrology; Geology; Water Science and Technology; Soil Science
Abstract :
[en] Environmental conditions have a notable impact on clay minerals, primarily because of the chemical reactions they undergo with their immediate environment. These reactions are more pronounced in hot and humid tropical regions, and therefore, the study of clays deposited at the bottom of lakes in tropical regions can yield valuable insight into past environmental conditions. Here we present multiproxy records, including physical (magnetic susceptibility, grey-scale level and grain size), mineralogical (X-ray diffraction, Simultaneous Thermal Analysis, Fourier-Transform Infrared Spectroscopy), and geochemical (elemental composition by XRF-core scanner, organic geochemistry by IRMS) data, from three 210Pb-dated sediment cores (spanning recent centuries < 1470 CE) retrieved from crater lakes Los Espinos, Tacámbaro and Teremendo in the Trans-Mexican Volcanic Belt (TMVB), central Mexico. The mineralogical results showed that disordered kaolinite, formed by hydrolysis and hydrothermal alteration, was the predominant mineral in the sediments of the three lakes. The abundance of kaolinite changed in line with organic carbon and organic matter-related elements (Br, S and Ni) and showed opposite trends with lithogenic elements (Ti, K, and Fe). The geochemical data further suggested that increases in kaolinite abundance are linked to the formation of organo-mineral aggregates related to periods of elevated lake productivity that in turn may reflect lake level changes in the closed basins. In Lake Tacámbaro, following the construction of a canal in the early 20th century and subsequent regulation of lake level, the relationship between organic material and kaolinite was no longer present.
Research center :
Geology - ULiège [BE]
Disciplines :
Earth sciences & physical geography
Author, co-author :
Fagel, Nathalie  ;  Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Israde-Alcántara, Isabel
Safaierad, Reza ;  Université de Liège - ULiège > Geology
Rantala, Marttiina ;  Université de Liège - ULiège > Geology
Schmidt, Sabine
Lepoint, Gilles  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution
Pellenard, Pierre
Mattielli, Nadine ;  Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Metcalfe, Sarah
Language :
English
Title :
Environmental significance of kaolinite variability over the last centuries in crater lake sediments from Central Mexico
Publication date :
January 2024
Journal title :
Applied Clay Science
ISSN :
0169-1317
eISSN :
1872-9053
Publisher :
Elsevier BV
Volume :
247
Pages :
107211
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 10 November 2023

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