Details zur Publikation |
| Kategorie | Textpublikation |
| Referenztyp | Zeitschriften |
| DOI | 10.1016/j.scitotenv.2024.176752 |
Lizenz  |
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| Titel (primär) | A new type of submarine chimneys built of halite |
| Autor | Siebert, C.
; Ionescu, D.; Mallast, U.; Merchel, S.; Merkel, B.; Möller, P.; Pavetich, S.; Pohl, T.; Rödiger, T.; Yechieli, Y. |
| Quelle | Science of the Total Environment |
| Erscheinungsjahr | 2024 |
| Department | MET; CATHYD |
| Band/Volume | 955 |
| Seite von | art. 176752 |
| Sprache | englisch |
| Topic | T5 Future Landscapes |
| Keywords | Cold-water smoker; Sinkhole hazard; Salt cavitation; Submarine groundwater discharge |
| Abstract | In contrast to the subaquatic sulphide and carbonate chimneys, which are
known from Mid Ocean Ridges and abyssal submarine volcanoes, chimneys
built of salts have not been described yet. Here we present such halite
chimneys as a new form of cold-water smokers in hypersaline
environments. The here described structures rise up from the bottom of
the Dead Sea and result from the submarine discharge of saturated
halite-dissolution brines into the salt lake, which is at halite
saturation and holds remarkable chloride excess. At the interface with
the lake brine, halite precipitates instantaneously, forming chimneys up
to several meters in height. The brines leading to the formation of
these chimneys vary in composition, while their generation processes are
similar. Fresh groundwater from surrounding aquifers enters the saline
lake sediments and considerably leaches halite in the adjacencies of the
lake. Simultaneously, it mixes with ancient brines before it emerges
from the lake floor. The distinct differences in composition between the
Dead Sea and the emerging chimney brines lead to the instantaneous
crystallisation of halite and few other mineral phases. The chimney
structure result from the buoyancy flow of the chimney brines, which are
less dense then the ambient Dead Sea. The chimneys indicate intense cavitation of massive halite bodies in the subsurface of the Dead Sea environment, a process that leads to increasing formation of hazardous sinkholes. Since chimneys are proven in shallow water but may be expected in deeper parts too, they are comfortably mappable by echo-sounding or aerial imaging. They thus provide in the Dead Sea as in any likewise setting a potent predictive tool to locate dangerous subsurface cavitation and hence areas that are at risk of collapse in the near future. |
| dauerhafte UFZ-Verlinkung | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=29767 |
| Siebert, C., Ionescu, D., Mallast, U., Merchel, S., Merkel, B., Möller, P., Pavetich, S., Pohl, T., Rödiger, T., Yechieli, Y. (2024): A new type of submarine chimneys built of halite Sci. Total Environ. 955 , art. 176752 10.1016/j.scitotenv.2024.176752 |
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