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词条 Gaet'ale Pond
释义

  1. Location and origin

  2. Composition of the water

  3. References

{{coord|14|12|47.1|N|40|19|17.3|E|display=title}}Gaet'ale Pond is a small hypersaline lake located near the Dallol crater in the Danakil Depression (Afar, Ethiopia). It is placed over a hot spring of tectonic origin and has no apparent inlet or outlet streams. The water of Gaet'ale Pond has a salinity of 43%, making it the saltiest water body on Earth[1], the second is Don Juan Pond in Antarctica with a salinity of 338 ‰ = 33.8%.[2]

Location and origin

Gaet'ale pond is the biggest of a series of small ponds located at about 4 km southeast of Dallol springs. It is crescent-shaped with a diameter of about 60 m.

According to people living in the nearby village of Ahmed'ela, the pond was generated after an earthquake on January 2005.[3] The waters of the lake originate from a thermal spring located beneath it. For this reason its temperature (50–55 °C) is hotter than the environment.[4]

Composition of the water

The salts in the water of Gaet'ale Pond are mainly composed by calcium chloride (CaCl2) at 2.72 mol/kg and magnesium chloride (MgCl2) at 1.43 mol/kg. It also contains small amounts of Na+, K+ and NO2 ions. The total amount of dissolved solids content is 433 g/L or 43.3%. It also contains traces of Fe3+ that form a complex with Cl, giving the water a characteristic yellow color.[1]

Bubbles of odourless gas are emitted from the lake surface. It is likely volcanically produced CO2. Bird and insect corpses have been found around the pond, and it has been proposed that the gas may be harmful for small animals or humans.[4]

References

1. ^{{cite journal|last1=Perez|first1=Eduardo|last2=Chebude |first2=Yonas |title=Chemical Analysis of Gaet’ale, a Hypersaline Pond in Danakil Depression (Ethiopia): New Record for the Most Saline Water Body on Earth|journal=Aquatic Geochemistry|date=April 2017|volume=23|issue=2 |pages=109–117|doi=10.1007/s10498-017-9312-z}}
2. ^{{cite book|last1=Hammer|first1=U.T.|title=Saline Lake Ecosystems of the World |date=1986|publisher=Springer |isbn=9789061935353|page=109 |url=https://books.google.com.au/books?id=NOdvPFm6SyoC&pg=PA109|accessdate=27 March 2018}}
3. ^{{cite journal|last1=Master|first1=S|title=Gaet’ale- a reactivated thermal spring and potential tourist hazard in the Asale salt flats, Danakil Depression, Ethiopia|journal=Journal of Applied Volcanology|date=2016|volume=5|pages=1–9}}
4. ^{{cite web|last1=Fox-Skelly|first1=Jasmin|title=In Earth’s hottest place, life has been found in pure acid|url=http://www.bbc.com/future/story/20170803-in-earths-hottest-place-life-has-been-found-in-pure-acid|website=BBC Future|accessdate=27 March 2018|date=4 August 2017}}

5 : Bodies of water of Ethiopia|Afar Region|Ponds of Africa|Saline lakes of the Great Rift Valley|2008 beginnings

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