Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes

Abstract We investigated the volcanic Narlı Lake in Central Anatolia combining high-resolution bathymetry and geochemical measurements. In this study, we present it as proof of a new concept to verify fluid pathways beneath lakes integrating the structure of the geothermal reservoir into the surroun...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Maren Brehme, Ronny Giese, Uğur Erdem Dokuz, Fatih Bulut
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/494de243265b4a7795952113f0dff714
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:494de243265b4a7795952113f0dff714
record_format	dspace
spelling	oai:doaj.org-article:494de243265b4a7795952113f0dff7142021-12-02T16:45:10ZFluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes10.1038/s41598-021-87743-52045-2322https://doaj.org/article/494de243265b4a7795952113f0dff7142021-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-87743-5https://doaj.org/toc/2045-2322Abstract We investigated the volcanic Narlı Lake in Central Anatolia combining high-resolution bathymetry and geochemical measurements. In this study, we present it as proof of a new concept to verify fluid pathways beneath lakes integrating the structure of the geothermal reservoir into the surrounding tectonic frame. We recognized dextral faults fracturing inherited volcanic formations and thus generating highly permeable zones beneath the lake. At intersection points of faults, reservoir fluids discharge from deep holes as imaged by the high-resolution bathymetry at the bottom of the Narlı Lake. Onshore, the tectonic setting also generates both extensional and compressional structures. Extensional structures result in extensive fluid discharge through hot springs while compressional structures do not discharge any fluid. The water of the lake as well as in the hot springs is highly saline and has relatively high concentrations of Cl, HCO3, SO4, Na, Ca, Mg, and Si. In several hot springs, we observed mixtures of high-saline fluids having a deep origin and low-saline shallow groundwater. We observed discharge into the lake by gas bubbles, which contain probably CO2 or H2S. Mineral precipitation indicates a carbonatic source at the lake bottom and along the shoreline. Extensive travertine precipitation also occurs near hot springs along the nearby extensional zone of Ihlara Valley. In summary, the composition of fluids and minerals is controlled by water–rock interaction through the volcanic and carbonatic rocks beneath this volcanic lake.Maren BrehmeRonny GieseUğur Erdem DokuzFatih BulutNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maren Brehme Ronny Giese Uğur Erdem Dokuz Fatih Bulut Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
description	Abstract We investigated the volcanic Narlı Lake in Central Anatolia combining high-resolution bathymetry and geochemical measurements. In this study, we present it as proof of a new concept to verify fluid pathways beneath lakes integrating the structure of the geothermal reservoir into the surrounding tectonic frame. We recognized dextral faults fracturing inherited volcanic formations and thus generating highly permeable zones beneath the lake. At intersection points of faults, reservoir fluids discharge from deep holes as imaged by the high-resolution bathymetry at the bottom of the Narlı Lake. Onshore, the tectonic setting also generates both extensional and compressional structures. Extensional structures result in extensive fluid discharge through hot springs while compressional structures do not discharge any fluid. The water of the lake as well as in the hot springs is highly saline and has relatively high concentrations of Cl, HCO3, SO4, Na, Ca, Mg, and Si. In several hot springs, we observed mixtures of high-saline fluids having a deep origin and low-saline shallow groundwater. We observed discharge into the lake by gas bubbles, which contain probably CO2 or H2S. Mineral precipitation indicates a carbonatic source at the lake bottom and along the shoreline. Extensive travertine precipitation also occurs near hot springs along the nearby extensional zone of Ihlara Valley. In summary, the composition of fluids and minerals is controlled by water–rock interaction through the volcanic and carbonatic rocks beneath this volcanic lake.
format	article
author	Maren Brehme Ronny Giese Uğur Erdem Dokuz Fatih Bulut
author_facet	Maren Brehme Ronny Giese Uğur Erdem Dokuz Fatih Bulut
author_sort	Maren Brehme
title	Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
title_short	Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
title_full	Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
title_fullStr	Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
title_full_unstemmed	Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes
title_sort	fluid pathways identified beneath narlı lake (central anatolia) show the geothermal potential of former volcanoes
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/494de243265b4a7795952113f0dff714
work_keys_str_mv	AT marenbrehme fluidpathwaysidentifiedbeneathnarlılakecentralanatoliashowthegeothermalpotentialofformervolcanoes AT ronnygiese fluidpathwaysidentifiedbeneathnarlılakecentralanatoliashowthegeothermalpotentialofformervolcanoes AT ugurerdemdokuz fluidpathwaysidentifiedbeneathnarlılakecentralanatoliashowthegeothermalpotentialofformervolcanoes AT fatihbulut fluidpathwaysidentifiedbeneathnarlılakecentralanatoliashowthegeothermalpotentialofformervolcanoes
_version_	1718383512721031168

Fluid pathways identified beneath Narlı Lake (Central Anatolia) show the geothermal potential of former volcanoes

Ejemplares similares