Science, Space and Technology News 2023
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These diamonds which were formed between 650 and 450 million years ago on the base of the supercontinent Gondwana, were analyzed by an international team of experts, and have shown how supercontinents such as Gondwana were formed, stabilized, and how they move around the planet.“Superdeep diamonds are extremely rare and we now know that they can tell us a lot about the whole process of continent formation,” says Dr Karen Smit of the Wits School of Geosciences, who was part of the study.
By dating the tiny silicate and sulfide inclusions inside the diamonds, the team led by Dr Suzette Timmerman of the, Switzerland, dated the diamonds that formed 300 to 700km deep under the base of Gondwana. The goal was to trace how material was added to the keel of the supercontinent. While doing this, the team recognized a previously unknown geologic process.
The current locations for these volcanic eruptions are on the continental fragments of Brazil and Western Africa, two of the key components of Gondwana. Thus, the diamonds must have migrated together with different parts of the former supercontinent as they dispersed, “glued” to their base.
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