The first data on isotopic age of Anyui volcano (Chukotka)

Anyui Volcano in Chukotka: Age, structure, pecularities of rocks’ composition and eruptions

“…In (Akinin and Calvert, 2012), the age of Anyui Volcano is estimated to be 42.7 ± 2.4 and 12.9 ± 3.4 ka ( 40 Ar/ 39 Ar method, US Geological Survey). According to our isotopic measurements (K-Ar method, GIN RAN), Anyui Volcano was formed approximately 250 ka ago (0.248 ± 0.030 Ma) (Pevzner et al, 2011).…”

“…Discussion of Radiometric Dating Results After publication of the article (Pevzner et al, 2011), in which age of Anyui Volcano was estimated to be approximately 250 ka, new 40 Ar/ 39 Ar dates were reported in (Akinin and Calvert, 2012), according to which Anyui Volcano was formed in the Holocene. In the last work, three samples taken for dating were mentioned, but only two dates (42.7 ± 2.4 and 12.9 ± 3.4 ka), which was obtained for samples from the cinder cone crater, and "lava flow extending from the latter in the Monni River valley" are presented (Akinin and Calvert, 2012, p. 25).…”

Volcanic ash layers in Lake El'gygytgyn: eight new regionally significant chronostratigraphic markers for western Beringia

“…Even though intracontinental volcanoes in Chukotka are present ∼ 300 km from Lake El'gygytgyn ( Fig. 1), much of their activity was limited to the Cretaceous (Akinin and Miller, 2012); only few centers have been active over the Quaternary (Pevzner et al, 2011). Moreover, these volcanoes are associated with mafic lava fields, dykes and/or cinder cones (Laverov et al, 2006), and are thus unlikely sources for the El'gygytgyn tephras.…”