What is it about?
The goal of this study is to test the lake-level curve of Laguna Cháltel with the experimental model developed for Laguna Potrok Aike, but now used in Laguna Chaltel, to identify the magnetic indicator that best correlates with lake-level changes. Additionally, we examine a core from the littoral of the same lake to infer local palaeoenvironmental changes and discuss assumptions about wind strength in the catchment area of the lake.
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Why is it important?
The results show that the magnetic model is promising for inferring lake-level variations, particularly in Patagonian lakes.
Perspectives
In Patagonian lakes like Laguna Cháltel, where soft magnetic minerals such as Ti-magnetite are obtained as uniform magnetic mineralogy, the following magnetic ratios and parameters can be used as environmental indicators: • ARM/SIRM ratio (preferably) and ARM as lake-level indicators in central cores. • ARM versus ARM/SIRM as wind strength indicators in central cores. • Magnetic grain size as runoff intensity of tributaries for cores taken from more proximal locations.
Dr María A Irurzun
CIFICEN
Read the Original
This page is a summary of: Testing lake-level reconstructions based on rock magnetic proxies for the sediment record of Laguna Cháltel (Patagonia, Argentina), Quaternary Research, April 2020, Cambridge University Press,
DOI: 10.1017/qua.2020.15.
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