Navigation Links
Magma in Earth's mantle forms deeper than once thought
Date:1/24/2013

ded geologists who had suspected, but could not demonstrate, the existence of deeper magma, said Dasgupta.

For example, when scientists try to determine the mantle's density, they do so by measuring the speed of a seismic wave after an earthquake, from its origin to other points on the planet.

Because such waves travel faster through solids (e.g., crust) than through liquids (e.g., magma), geologists had been surprised to detect waves slowing down, as though passing through liquid, in a zone that should be the mantle's faster "express lane."

"Seismologists have observed anomalies in velocity data as deep as 200 kilometers beneath the ocean floor," Dasgupta said.

"It turns out that trace amounts of magma are generated at this depth, which would potentially explain that" slower velocity.

The research also offers clues to the electrical conductivity of the oceanic mantle.

"The magma at such depths has a high enough concentration of dissolved carbon dioxide that its conductivity is very high," Dasgupta said.

But, because scientists have not yet been able to sample the mantle directly, researchers have had to extrapolate from the properties of rocks carried up to the surface.

So, in a previous study, Dasgupta determined that melting in Earth's deep upper mantle is caused by the presence of carbon dioxide.

The present study shows that carbon helps to make silicate magma at significant depths. And, the researchers also found that carbonated rock melts at significantly lower temperatures than non-carbonated rock.

"This deep melting makes the silicate differentiation [changes in silicate distribution that range from the dense metallic core, to the less-dense silicate-rich mantle, to the thinner crust] of the planet much more efficient than previously thought," Dasgupta said.

"Deep magma is the main agent that brings all the key ingredients for life--water and carbon--to the
'/>"/>

Contact: Cheryl Dybas
cdybas@nsf.gov
703-292-7734
National Science Foundation
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Mafic melts, methane seeps, 2 million waves, foreign magma, and the invisible hand
2. A new gene thought to be the cause in early-onset forms of Alzheimers disease
3. Research on carbon-consuming life-forms in Antarctica published in JoVE
4. Study by UC Santa Barbara psychologists reveals how brain performs motor chunking tasks
5. AcelRx Pharmaceuticals Receives First U.S. Patent for Small-Volume Oral Transmucosal Dosage Forms
6. Creating a future of personalized medicine: U-M forms joint venture for DNA diagnostics
7. Desert farming forms bacterial communities that promote drought resistance
8. Insect-eating bat outperforms nectar specialist as pollinator of cactus flowers
9. Wind pushes plastics deeper into oceans, driving trash estimates up
10. A deeper look into the pathogen responsible for crown gall disease in plants
11. In protein folding, internal friction may play a more significant role than previously thought
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Magma in Earth's mantle forms deeper than once thought
(Date:7/31/2014)... available in German . ... gases similar to a sponge that soaks up liquids. ... hydrogen or greenhouse gases. However, loading of many MOFs ... Technology (KIT) now report in Nature Communications ... MOF surface. This can be prevented by water-free synthesis ...
(Date:7/31/2014)... better identify and treat those with fibromuscular dysplasia (FMD). ... sized arteries in the body, which can restrict blood flow ... new report appearing in August 2014 issue of ... FMD may not be limited to the arteries as currently ... bones and joints, as well as evidence that inflammation may ...
(Date:7/31/2014)... found that bacteria in the Gulf of Mexico consumed ... during the Deepwater Horizon spill in the months after ... In two new studies conducted in a deep sea ... bacteria called Colwellia likely consumed gaseous hydrocarbons ... were released as part of the oil spill. ...
Breaking Biology News(10 mins):Free pores for molecule transport 2Scientists discover biochemical mechanisms contributing to fibromuscular dysplasia 2
... in soils are as diverse in the tropical forests of Costa ... the tundra and boreal forests of Alaska and Sweden. That ... Proceedings of the National Academy of Sciences . Scientists ... found above ground at the equator than at the Earth,s poles. ...
... series are already enjoying the advantages of synthetic blood. While ... big screen, the true benefits of blood manufactured from embryonic ... It is unclear however whether society can develop an acceptance ... produced by related technology. For this reason it is ...
... WASHINGTON and LONDON On the heels of a ... D.C., leaders of the U.S. National Academy of Sciences and ... global insurance and reinsurance broker headquartered in the U.K., pledged ... financial resilience of populations to extreme events. Although 2011 ...
Cached Biology News:From tropics to poles: Study reveals diversity of life in soils 2Can we share vampires' appetite for synthetic blood? 2US science academy and global reinsurance broker spark 2US science academy and global reinsurance broker spark 3US science academy and global reinsurance broker spark 4
(Date:7/31/2014)... July 31, 2014 Research and Markets ... Genomics Market 2014-2018" report to their offering. ... is the study of the genetic material or genomes ... strong basis for the discovery and development of diagnostic ... or health conditions. Genomics is supported by three major ...
(Date:7/31/2014)... 2014 Senomyx , Inc. (NASDAQ: ... proprietary taste science technologies to discover, develop, and ... and ingredient supply industries, today reported financial results ... the second quarter with $33.6 million in cash ... the past quarter Senomyx achieved another important milestone ...
(Date:7/31/2014)... and SHENZHEN, China , July ... today the purchase of an Irys™System by ... selected BioNano,s platform to enable comprehensive exploration of human ... for various organisms of interest, including those where no ... together to develop new methods for multiplexing on the ...
(Date:7/31/2014)... Diego, CA (PRWEB) July 31, 2014 ... announced today the integration of Omicsoft’s Array Suite with ... both platforms will be able to send data in ... integration works with all versions of tranSMART including the ... the art statistics, visualization and storage for the analysis ...
Breaking Biology Technology:Global Genomics Market 2014-2018: Key Vendors are F. Hoffmann-La Roche, Life Technologies, Qiagen and Illumina 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 2SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 3SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 4SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 5SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 6SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 7SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 8SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 9SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 10SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 11SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 12SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 13SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 14SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 15SENOMYX ANNOUNCES CORPORATE UPDATE AND SECOND QUARTER 2014 FINANCIAL RESULTS 16BioNano Genomics Announces the Purchase of the Irys System by BGI 2BioNano Genomics Announces the Purchase of the Irys System by BGI 3BioNano Genomics Announces the Purchase of the Irys System by BGI 4Rancho BioSciences, in Partnership with Omicsoft, have Integrated Array Suite with tranSMART 2Rancho BioSciences, in Partnership with Omicsoft, have Integrated Array Suite with tranSMART 3
... May 25, 2011 Otonomy, Inc., ... for diseases and disorders of the inner and ... Wroblewski as the company,s chief operations officer.  Mr. ... the areas of manufacturing, product supply chain management, ...
... Lund, Sweden, researchers can study a wide range of different ... This could be useful for both basic research and industry ... DanishSwedish collaboration. Now it is opening for research. The ... is used to examine the components of materials and their ...
... Spherix Incorporated (NASDAQ: SPEXD) – an ... syndrome and atherosclerosis, and providers of technical and ... pharmaceutical companies – today announced that it has ... concerns minimum bid price listing requirements. ...
Cached Biology Technology:Otonomy Appoints Gerald Wroblewski as Chief Operations Officer 2Otonomy Appoints Gerald Wroblewski as Chief Operations Officer 3New beamline at MAX II opens for research 2Spherix Regains Compliance With NASDAQ Listing Rule 2
...
... HighSens reagents and supplies, for 10 ... sufficient to perform high-sensitivity RNA analysis ... the Experion automated electrophoresis system. Supplied ... microliters RNA HighSens stain, 20 microliters ...
... solid. PROTECT FROM LIGHT. PACKAGED UNDER ... that acts as a selective, reversible ... (IC 50 = 4 μM ... and PTP1B 298 , respectively). ...
...
Biology Products: