Baffin Island, located between mainland Canada and Greenland, is a vast Arctic expanse spanning over 500, 000 square kilometers, making it the fifth largest island in the world.
A group of Canadian scientists studying igneous kimberlite rocks discovered a fragment of the ancient continent in the area. The found rocks have a specific mineral composition, characteristic exclusively for this craton (continental section of the earth's crust - ed. Tekhkult)
According to scientists, these kimberlite rocks were formed at a depth of 150 km and were squeezed out to the surface due to geological and chemical processes.
The appearance of rocks under the present-day Baffin Island is evidence of the processes of formation of the earth's surface that took place about 150 million years ago, in particular, during the drift of the continental plate of the North Atlantic Craton (NAC). Fragments of NAC that broke away millions of years ago have also been found in Scotland, Labrador and Greenland.
In the process of research, scientists used a number of analytical methods, including petrography and thermobarometry, which allowed them to study 120 rock samples - xenoliths.
“The found samples of mantle rocks that have come down to us from the bowels of the Earth will help in recreating the outlines of ancient continents, ” says Maya Kopylova, a geologist at the University of British Columbia. "Now we can study and map not only the topmost and very thin layer of the earth's crust, which is only 1% of the planet's volume, but also much deeper regions."