Featured Research

from universities, journals, and other organizations

Characterizing channels for transport of melt in mantle

Date:
August 31, 2010
Source:
American Geophysical Union
Summary:
Rock in the Earth's mantle melts as it upwells toward the surface, as can be seen beneath mid-ocean ridge spreading centers. This buoyant melt rises through the mantle to the surface, where it solidifies and becomes part of the Earth's crust. However, the pathways through which mantle melt migrates have not been well understood. It had been suggested that channels through highly porous dunite rock provided pathways for mantle melt, but the depth and other features of these channels have not been known.

Rock in the Earth's mantle melts as it upwells toward the surface, as can be seen beneath mid-ocean ridge spreading centers. This buoyant melt rises through the mantle to the surface, where it solidifies and becomes part of the Earth's crust. However, the pathways through which mantle melt migrates have not been well understood. It had been suggested that channels through highly porous dunite rock provided pathways for mantle melt, but the depth and other features of these channels have not been known.

To investigate how dunite channels would form and how melt would flow through them in an upwelling mantle, Liang et al. conduct numerical simulations. They find that interconnected dunite channels form the shallow part of the porous channels through which melt passes. However, deeper in the mantle, melt travels through channels composed of the rocks harzburgite and lherzolite.

In addition, the simulation shows that primary channels deeper in the mantle can lead to the formation of shallower secondary channels created by reactions between melt and rock during melt migration. These results could help geologists interpret field measurements and improve models for mantle melt migration, shedding light on mantle dynamics and crust formation.

Authors of the study include: Yan Liang, E. Marc Parmentier: Department of Geological Sciences, Brown University, Providence, Rhode Island, USA; Alan Schiemenz: Department of Geological Sciences, Brown University, Providence, Rhode Island, USA and Division of Applied Mathematics, Brown University, Providence, Rhode Island, USA; Marc A. Hesse: Department of Geological Sciences, Brown University, Providence, Rhode Island, USA, now at Department of Geological Sciences, University of Texas at Austin, Austin, Texas, USA; Jan S. Hesthaven: Division of Applied Mathematics, Brown University, Providence, Rhode Island, USA.


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Journal Reference:

  1. Yan Liang, Alan Schiemenz, Marc A. Hesse, E. Marc Parmentier, Jan S. Hesthaven. High-porosity channels for melt migration in the mantle: Top is the dunite and bottom is the harzburgite and lherzolite. Geophysical Research Letters, 2010; 37 (15): L15306 DOI: 10.1029/2010GL044162

Cite This Page:

American Geophysical Union. "Characterizing channels for transport of melt in mantle." ScienceDaily. ScienceDaily, 31 August 2010. <www.sciencedaily.com/releases/2010/08/100831095347.htm>.
American Geophysical Union. (2010, August 31). Characterizing channels for transport of melt in mantle. ScienceDaily. Retrieved April 20, 2014 from www.sciencedaily.com/releases/2010/08/100831095347.htm
American Geophysical Union. "Characterizing channels for transport of melt in mantle." ScienceDaily. www.sciencedaily.com/releases/2010/08/100831095347.htm (accessed April 20, 2014).

Share This



More Earth & Climate News

Sunday, April 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Drought Concerns May Hurt Lake Tourism

Drought Concerns May Hurt Lake Tourism

AP (Apr. 18, 2014) Operators of recreational businesses on western reservoirs worry that ongoing drought concerns will keep boaters and other visitors from flocking to the popular summer attractions. (April 18) Video provided by AP
Powered by NewsLook.com
Man Claims He Found Loch Ness Monster With... Apple Maps?

Man Claims He Found Loch Ness Monster With... Apple Maps?

Newsy (Apr. 18, 2014) Andy Dixon showed the Daily Mail a screenshot of what he believes to be the mythical beast swimming just below the lake's surface. Video provided by Newsy
Powered by NewsLook.com
First Ever 'Female Penis' Discovered In Animal Kingdom

First Ever 'Female Penis' Discovered In Animal Kingdom

Newsy (Apr. 18, 2014) Not only are these newly discovered bugs' sex organs reversed, but they also mate for up to 70 hours. Video provided by Newsy
Powered by NewsLook.com
Ark. Man Finds 6-Carat Diamond At State Park

Ark. Man Finds 6-Carat Diamond At State Park

Newsy (Apr. 18, 2014) An Arkansas man has found a nearly 6.2-carat diamond, which he dubbed "The Limitless Diamond," at the Crater of Diamonds State Park. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins