Geodynamics

An Arctic enigma: Can a single plume explain a massive and long-lived ancient volcanic eruption?

Björn Heyn and edited by Constanza Rodriguez Piceda July 17, 2024

Volcanic eruption in Iceland from 2014. The mantle plume responsible for present-day Icelandic volcanism may also have caused the massive and wide-spread HALIP in the Arctic. Credit: Jamie Farquharson (distributed via imaggeo.egu.eu).

Across the Arctic lies evidence for a massive past volcanic event, called the High Arctic Large Igneous Province (HALIP). This ancient volcanic event is particularly unusual in that it appears to have lasted for over 50 million years. Could a single deep-seated mantle plume cause such wide-spread and long-lived volcanism? In a recent study published in the journal G-cubed (Heyn et al., 2024 ...[Read More]

Modeling the Early Earth: Idealization and its Aims I

Junjie Dong and edited by Rajani Shrestha July 10, 2024

An artist’s impression of the early Archean Earth, with minimal landmasses and a global ocean. Image credit: Alec Brenner.

The question of how we came to be is closely tied with how the Earth became what it now is. What was the early Earth like? How did it evolve to become a habitable world? Given a fragmentary rock record, how can we investigate the early Earth and its evolution? Dr. Junjie Dong from Caltech writes about modeling the early Earth in a two-part blog. For the first part, he introduces the approach to e ...[Read More]

The uncertain tomographic lenses

Franck Latallerie and edited by Constanza Rodriguez Piceda July 3, 2024

The SOLASW3D model (credit: author)

Geodynamicists often try to answer scientific questions related to the Earth interior, but direct observations of such depths are rather limited–unless you are character in a Jules Verne’s novel or a prominent scientist in the movie The Core–. A way to deal with this issue is to rely on indirect methods, with seismic tomography being one of the most widely used by geoscientists. Howeve ...[Read More]

The Sassy Scientist – Gotta Bake ‘Em All

The Sassy Scientist June 28, 2024

Is it summer already? Have we come to the horrendous deadline period before the holidays? I know it’s impossible, but when you close your eyes, do you imagine the sea or the mountains? (Choose your fighter: Lapras or Machamp.) Luckily, we have a question that will give you a break from all this and act as a refreshment for that hot weather. I guess Emi is preparing for the holidays with the family ...[Read More]