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:8/21/2014)... a previously unknown process for harvesting energy and producing ... Penn State University scientist has discovered. The discovery lays ... growth, harvesting energy from the Sun, and understanding dense ... other lakes worldwide. A paper describing the discovery will ... of the journal Science on 21 August ...
(Date:8/21/2014)... Nine researchers from Beth Israel Deaconess Medical Center ... "The World,s Most Influential Scientific Minds 2014," a ... ScienceWatch, a web resource for science metrics and research ... among the most influential "are performing and publishing work ... of their science," according to a Thomson Reuters statement. ...
(Date:8/21/2014)... recently published in the journal Carcinogenesis by ... role for the protein adenomatous polyposis coli (APC) in ... deaths in the U.S. , Lead author Kristi Neufeld, ... co-leader of the Cancer Biology program at the KU ... career trying to understand the various activities of APC, ...
Breaking Biology News(10 mins):Hot-spring bacteria reveal ability to use far-red light for photosynthesis 2Hot-spring bacteria reveal ability to use far-red light for photosynthesis 3BIDMC researchers named among 'the most influential scientific minds' 2BIDMC researchers named among 'the most influential scientific minds' 3Research offers insight into cellular biology of colorectal cancer 2Research offers insight into cellular biology of colorectal cancer 3
... discovery of a much sought after crack in the armor ... of the world,s population, causing stomach ulcers and other diseases. ... chemical pathway that the bacteria need for survival. Their study, ... these hard-to-treat microbes, is scheduled for the October 16 issue ...
... Exposure to radon gas in homes is the second leading ... carried out by researchers from the University of Cantabria and ... on exposure to this element in a uranium mining area ... Madrid. Numerous studies worldwide have shown that radon, a ...
... researchers at the University of California, Berkeley, has identified ... muscle. By manipulating these pathways, the researchers were able ... restoring its ability to repair and rebuild itself. ... issue of the journal EMBO Molecular Medicine , ...
Cached Biology News:Study in Spain and Romania confirms radon as second leading cause of lung cancer 2Study in Spain and Romania confirms radon as second leading cause of lung cancer 3Scientists discover clues to what makes human muscle age 2Scientists discover clues to what makes human muscle age 3Scientists discover clues to what makes human muscle age 4
(Date:8/21/2014)... , August 21, 2014 ... ) has announced the addition of the  ... to their offering.       (Logo: ... hormone therapy, is a means of replacing ... by the body. This type of therapy ...
(Date:8/21/2014)... BURLINGTON, Mass. , Aug. 21, 2014 /PRNewswire/ ... in Brazil and ... restrictions. The uptake of several newly approved agents, ... for this indication and the launch of emerging ... asthma markets. In particular, the emerging IL-5 inhibitors ...
(Date:8/21/2014)... VIEW, Calif. , Aug. 21, 2014 /PRNewswire/ ... properties and behaviors based on external stimuli such ... poised to have a disruptive effect in multiple ... revolutionize the business landscape by printing objects ranging ... aerospace and automotive sectors. Logo - ...
(Date:8/21/2014)... August 21, 2014 SoundConnect ... been recognized as one of the nation’s Fastest ... magazine for the 2nd consecutive year. Inc. magazine ... annual Inc. 500|5000, an exclusive ranking of the ... most comprehensive look at the most important segment ...
Breaking Biology Technology:Global Hormone Replacement Therapy Market 2014-2018: Key Vendors are Actavis, Bayer, Merck & Co, Novartis and Novo Nordisk 2Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 2Asthma Agents Currently Face a Suboptimal Coverage Environment in Brazil and Mexico, and as the Treatment Armamentarium Expands, Competitiveness Will Further Intensify 3Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 2Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 3Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 4SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 2SoundConnect Returns on Inc. 5000 List of Fastest Growing Companies 3
... The National,Institutes of Allergy and Infectious Diseases ... Nordic to include the initiation of,a larger Phase ... in persons diagnosed with atopic dermatitis. The contract,extension ... has a value of,US$15 million, with the majority ...
... NEW YORK, Oct. 10 To mark 50 ... Disease Foundation,(PDF) will present an authoritative round-up of ... on Thursday, October 11 and Friday, October,12. The ... the latest news in Parkinson,s science and quality,of ...
... Paris: FR0005175080) announces that cash, cash equivalents and,short ... 30, 2007,compared to EUR 114.3 million at June ... nine months of 2007, cash, cash equivalents and ... was mainly due to,payments received from the partnership ...
Cached Biology Technology:Government Expands Trial With IMVAMUNE(R) Smallpox Vaccine in Persons With Atopic Dermatitis/Eczema 2Government Expands Trial With IMVAMUNE(R) Smallpox Vaccine in Persons With Atopic Dermatitis/Eczema 3The Parkinson's Disease Foundation Commemorates its 50th Anniversary with Special Scientific Symposium on Parkinson's Disease 2The Parkinson's Disease Foundation Commemorates its 50th Anniversary with Special Scientific Symposium on Parkinson's Disease 3
...
...
Kit for testing the ability of a compound to simulate lipolysis in cultured human adipocytes. Kit contains controls, buffers and reagents for detecting glycerol and non-esterified free fatty acids. A...
The strip cap tool is a used for properly seating 8- and 12-cap strips in microplates or strip tubes. A grooved channel on one side is designed to seat domed caps, while the flat edge on the opposite...
Biology Products: