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. 2021 Apr 22;11:8773. doi: 10.1038/s41598-021-87743-5

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Geochemical signature of lake water. (A) Location of presented measurements along central N-S profile (orange dots and stars) and selected fluid sample locations (DH1, 6, H8). (B) Temperature (T) and electrical conductivity (EC) measurements over depth along the N-S profile (orange dots and stars). Insert: White-yellowish precipitation around MTA-2 well at the lake shore (location in A). (C) T and EC values in the deepest layer at three selected locations along the N-S profile showing parallel trends and peaks of T and EC. (D) Element concentrations and pH value over depth in all layers at three selected sample locations (DH1, 6, H8).