The International Ocean Drilling Program's (IODP) Expedition 396 (Mid-Norwegian Continental Margin Magmatism) is currently underway offshore the Norwegian coastline. Two CEED scientists, Sverre Planke (Co-chief scientist) and Morgan Jones, are onboard the drill ship the Joides Resolution. Morgan will be sending us some updates between night-shifts!
An international team of geoscientists investigated the formation of an old subduction zone – where one plate dives under the other – in an area that extends from the eastern Mediterranean Sea to the Indian Ocean. They aimed to answer the question: What was the cause for splitting Earth’s crust along thousands of kilometers in an east-west direction while the large African plate was moving north towards Eurasia? They concluded in Nature Geoscience that the only explanation could be a mantle plume, an enormous upwelling of hot rock which led to the eruption of a supervolcano. Mantle plumes shaped the outer layer of the Earth frequently in geological times by forcing continents and oceans to break and by changing their courses.
A study published this month suggests that a mantle plume below Reunion triggered the initiation of subduction in the South Neotethys during the Late Cretaceous times. The results are published in Earth and Planetary Science Letters, and involved former CEED postdoc Maëlis Arnould. The event led to a series of plate reorganization events and ultimately to the closure of the South Neotethys Ocean, which used to separate Asia and India.
This week in Scientific Reports a ground-breaking study quantifies the amount of methane emissions from one of largest natural gas systems on Earth. The results deepen the scientific debate on the global emission of geological methane sources, and suggests that recent pre-industrial estimates are significantly underestimated. The study is part of an international collaborative study led by CEED Researcher Adriano Mazzini in the framework of the ERC grant LUSI LAB.
The CEED blog covers some behind-the-scenes about our latest research and activities. The contributors are a mix of students and staff from The Centre for Earth Evolution and Dynamics, Dept. of Geosciences, University of Oslo, Norway.