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Balagan-Tas (, ) is a cinder cone volcano in Russia. It was discovered by V.A. Zimin in 1939 and is one of the main features of Moma Natural Park.
Balagan-Tas is a volcanic cone with a crater of which little remains. It covers a surface area of . The crater is wide and deep; the cone is high and has a base diameter of . It may be considered a composite volcano. The volcano has generated three which cover a surface area of . They reach a thickness of .
The volcano has erupted typical for rift zone volcanoes. Its composition has been characterized as hawaiite. Titanium dioxide contents of 3.81% have been measured. The helium-3/helium-4 ratios approach these associated with .
Balagan-Tas lies on an anticline. It is associated with faulting. Further it is related to the Moma-Zoryansk rift and the Gakkel Ridge, which extends to the Laptev Sea. The De Long Islands and a potentially Quaternary dyke complex of the Viliga river may also be related. This tectonic activity is related to the interaction between the Eurasian Plate and the North American Plate.
Other volcanoes are found in the neighbourhood. Northwest of Balagan-Tas lies the Uraga Khaya volcano; it is located at and is a lava dome formed by rhyolite. Its age is unclear; potassium-argon dating has yielded an age of 16.6 mya but its appearance indicates it may be considerably younger. A further volcano may exist northwest of this centre. A liparite dome named Majak is located at , but it may be the same as Uraga Khaya and the coordinates wrong.
Potassium-argon dating of Balagan-Tas has yielded an age of 266,000 ± 30,000 years ago, comparable to Anyuj volcano, and may reflect a regional or global pulse of volcanic activity. Other sources consider the volcano late Holocene in age, or even as active during historical times. are found southeast of Balagan-Tas. They reach temperatures of , which together with the other activity indicates a hot upper mantle. If reports of activity of the supposed Indighirsky volcano in the 1770s refer to Balagan-Tas, then this volcano may have had historical activity, one of the few outside of Kamchatka in continental Asia.
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