Sentences with phrase «into oceanic crust»

«Water, absorbed into the oceanic crust as hydrous minerals, follows the plate into the mantle.

Study co-author Heye Freymuth of the University of Bristol explains: «Although uranium was incorporated into the oceanic crust since the initial rise in atmospheric oxygen about 2.4 billion years ago, the ocean crust did not incorporate higher amounts of uranium - 238 as the oceans did not yet have adequate supplies of oxygen.»

As a member of the American Miscellaneous Society, Munk helped initiate the Moho project to drill into oceanic crust.

Not exact matches

It marks the plate boundary between the subducting Nazca plate and the South America plate, where the oceanic crust and lithosphere of the Nazca plate begin their descent into the mantle beneath South America.

Magma from the mantle forms oceanic crust when it rises from the mantle to the surface at spreading centers and cools into the rock that forms the very bottom of the seafloor.

There it will seek out new species and habitats; it may also study subduction zones, where oceanic crust is recycled back into the earth's mantle.

The oceanic crust moves away from the mid-ocean-ridges and ultimately gets transported back into the underlying mantle through «subduction» at ocean trenches.

This suggests that the MORBs contain a «fingerprint» of the uranium from the oceanic crust, drawn down from the surface and into the upper part of Earth's mantle through subduction, according to Andersen.

In particular, the researchers found that a higher ratio of uranium - 238 to uranium - 235 is incorporated into the modern oceanic crust, when compared to the uranium isotope signature found in meteorites.

But volcanoes were still spewing into the atmosphere large amounts of carbon from recycled oceanic crust.

As long as rapid continental weathering continued, carbonate was deposited on the oceanic crust and subducted into what Lowe calls «a big storage facility... that kept most of the carbon dioxide out of the atmosphere.»

Older crust in turn is then forced back down into the Earth's mantle in places where a continental plate meets an oceanic plate.

Carbonates are important constituents of marine sediments and are heavily involved in the planet's deep carbon cycle, primarily due to oceanic crust sinking into the mantle, a process called subduction.

Scientists now estimate that the circulation of seawater through the oceanic crust accounts for 34 % of the heat input into the global oceans, about 25 % of the globe's total heat input.