Marginal continental and within-plate neoproterozoic granites and rhyolites of Wrangel Island, Arctic region

New research on Wrangel Island reveals two distinct clusters of Neoproterozoic granites and rhyolites, dated to approximately 690–730 million years ago (Ma) and 590–610 Ma. These findings suggest that the rocks crystallized during the Late Neoproterozoic period, with the older granites showing signs of a continental margin origin, similar to those found in Alaska's Seward Peninsula. The younger rhyolites exhibit geochemical features indicative of a mixed crustal and mantle source, forming part of a riftogenic bimodal igneous association. This study utilized U–Pb zircon age dating and isotopic geochemical analysis to uncover these geological insights.

Luchitskaya, M. V., Moiseev, A. V., Sokolov, S. D., Tuchkova, M. I., Sergeev, S. A., O’Sullivan, P. B., Verzhbitskii, V. E., & Malyshev, N. A. (2017). Marginal continental and within-plate neoproterozoic granites and rhyolites of Wrangel Island, Arctic region. Geotectonics, 51(1), 17–39. https://doi.org/10.1134/s0016852117010034