Not exact matches
As the
iron in the inner core cools and solidifies, the researchers hypothesize, some of those light elements would be squeezed out, like the salt extruded
from ice crystals when
seawater freezes.
A Cologne working group involving Prof. Carsten Münker and Dr. Elis Hoffmann and their student Sebastian Viehmann (working with Prof. Michael Bau
from the Jacobs University Bremen) have managed for the first time to determine the isotope composition of the rare trace elements Hafnium and Neodymium in 2.7 - billion - year - old
seawater by using high purity chemical sediments
from Temagami Banded
Iron Formation (Canada) as an archive.
When the team of geologists
from Stanford University re-created these conditions in a lab to try to duplicate an ultralow - velocity zone, they found that
iron — one of the more abundant minerals on Earth and a likely candidate material that might explain the zones — reacted with the
seawater to create a form of
iron peroxide that was saturated with hydrogen atoms, according to the new research.
By Year 1.1 billion, deep - sea hematite - bearing rock found in the Marble Bar chert formation of northwestern Australia indicates that
iron - rich water gushed
from volcanically heated seafloor vents were able to mix with cooler oxygen - rich
seawater (Ohmoto et al, Nature Geoscience, March 15, 2009; PSU press release, and in EurkaAlert; and Sid Perkins, ScienceNews, April 11, 2009).