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

surface of the Earth."

In Dasgupta's high-pressure lab, volcanic rocks are windows to the planet's interior. The researchers crush tiny rock samples that contain carbon dioxide to find out how deep magma forms.

"We have all the necessary tools to simulate very high pressures--to nearly 750,000 pounds per square inch--and temperatures," he said. "We can subject small amounts of rock to these conditions to see what happens."

The geologists use powerful hydraulic presses to partially melt rocks that contain tiny amounts of carbon, simulating what they believe is happening under equivalent pressures in the mantle.

"When rocks come from deep in the mantle to shallower depths, they cross . . . the solidus [boundary], where rocks begin to undergo partial melting and produce magmas," Dasgupta said.

"Scientists knew the effect of a trace amount of carbon dioxide or water would lower this boundary, but our new estimation made it 150-180 kilometers deeper from the known depth of 70 kilometers," he said.

"What we are now saying is that with just a trace of carbon dioxide in the mantle, melting can begin as deep as around 200 kilometers.

"When we incorporate the effect of trace water, the magma generation depth becomes at least 250 kilometers."

The extent of magma generation is larger than previously thought, he said, and, as a consequence, has the capacity to affect the geophysical and geochemical properties of the entire planet.


'/>"/>
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:4/18/2014)... techniques like X-ray crystallography and nuclear magnetic resonance imaging ... of molecules, but such efforts have long been hampered ... a specific molecule and often in ordered and crystalized ... impossible to peer into the structure of most molecules. ... be a thing of the past. , A ...
(Date:4/18/2014)... and comet impacts can cause widespread ecological havoc, killing ... scales. But new research from Brown University shows that ... at the time of an impact. , A research ... fragments of leaves and preserved organic compounds lodged inside ... The material could provide a snapshot of environmental conditions ...
(Date:4/17/2014)... chili peppers. Information about archaeological remains of ancient chili ... appearance of words for chili peppers in ancient dialects ... highlight the value of multi-proxy data analysis. Their results ... papers presented in a special feature issue of the ... on plant and animal domestication edited by Dolores Piperno, ...
Breaking Biology News(10 mins):MRI, on a molecular scale 2MRI, on a molecular scale 3Impact glass stores biodata for millions of years 2Impact glass stores biodata for millions of years 3Chickens to chili peppers 2Chickens to chili peppers 3
... Earthwatch met in Panama from Mar. 1-5 to present mid-term ... to identify and respond to the impacts of climate change. ... global team of bank employees ,climate champions, in ... program of its kind has so far: , Found ...
... $10.2 million commitment from the Robertson Foundation to create ... Duke Medicine,s pioneering cell therapy research and treatment programs ... and brain injuries suffered at birth. In making the ... Duke University, and Chief Executive Officer for Duke University ...
... medicine is one of today,s most exciting scientific and ... ,firsts, new rulings by regulatory bodies or ethical controversies. ... field, ethicists, legislators, the media and the public. ... are open to journalists and registration is free to ...
Cached Biology News:HSBC Climate Partnership yields initial research findings 2HSBC Climate Partnership yields initial research findings 3Robertson Foundation donates $10.2 million for Duke Cell Therapy Center 2Robertson Foundation donates $10.2 million for Duke Cell Therapy Center 3ESHRE Annual Meeting, June 27-30 in Rome 2
(Date:1/14/2014)... January 14, 2014 iLab Solutions, the leader ... the new Director of Product Strategy. In this role, Michelle ... iLab sub-teams to guide in the development of iLab products. ... the maximum possible benefit to the scientific community by offering ...
(Date:1/14/2014)... , Jan. 14, 2014  RXi Pharmaceuticals Corporation ... developing and commercializing innovative therapies addressing major unmet ... it received the Notice of Allowance from the ... unique self-delivering RNAi compounds (sd-rxRNA®), for the treatment ...
(Date:1/14/2014)... 14, 2014   Kinaxis ®, provider of RapidResponse ®, ... and operations planning ( S&OP ) service, is proud to ... which will be held at the Hilton San Diego Bayfront, ... customer Elisabeth Kaszas , Director of Supply Chain at ...
(Date:1/14/2014)... 14, 2014 Kerr Corporation, a leading manufacturer ... additional how-to information about dual arch impressions on its dental ... Arch Impressions,” the blog entry serves up a list of ... a step-by-step demonstration by Dr. David Little as he crafts ...
Breaking Biology Technology:iLab Solutions Announces Michelle Detwiler as the New Director of Product Strategy 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 2RXi Pharmaceuticals Receives US Notice of Allowance for a Key Patent Relating to its Self-Delivering Technology with sd-rxRNAs targeting CTGF, including RXI-109, for the Treatment of Fibrotic Disorders 3Event Alert: Kinaxis Customer to Present at the Biomanufacturing Summit "Supply Chain: Improving Network Effectiveness" 2
... has named Todd Creech as Chief Financial Officer and ... Creech has been fulfilling both positions as a consultant ... http://photos.prnewswire.com/prnh/20110214/FL47222LOGO ) "Todd comes to ... leadership roles and has demonstrated great success in helping ...
... Even with radical advances in medicine and technology ... penile extender system is still the most effective ... QuickExtenderPro.com, the leading provider of penis extender ... With the emergence of the penile extender, procedures such ...
... EXTON, Pa., Feb. 11, 2011 ViroPharma Incorporated (Nasdaq: ... chief executive officer of ViroPharma, will present at the Leerink ... ET on Thursday, February 17, 2011.  The conference is being ... ViroPharma,s presentations will be webcast live for investors through ...
Cached Biology Technology:Todd A. Creech Named Chief Financial Officer and Vice President of Business Development for SARcode Corporation 2Todd A. Creech Named Chief Financial Officer and Vice President of Business Development for SARcode Corporation 3QuickExtenderPro.com Penis Extender Device Engineered for Quick, Safe and Effective Alternative to Penis Enlargement Surgery 2ViroPharma to Participate in the Leerink Swann Hot Topics in Therapeutics Roundtable Conference 2
Recombinant Rhesus Monkey IFN-Alpha...
REGULATED IN DEVELOPMENT AND DNA DAMAGE RESPONSES 1,HIF-1 responsive RTP801...
RABBIT ANTI AMPHOTERIN...
4-Hydroxy-3-iodo-5-nitrophenylacetyl hapten is conjugated to BSA protein through lysine by amide bonds....
Biology Products: