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:9/18/2014)... Worcester, Mass. A novel robotic system that can ... currently being tested as part of a biomedical research ... with the aim of determining if the robot, in ... biopsies faster, more accurate, less costly, and less discomforting ... potential to deliver prostate cancer therapies with greater precision. ...
(Date:9/18/2014)... Wis. No matter how many times it,s ... social, communicating creatures. , But by using ... organisms radically alter their behavior to suit their ... of them are present, and act accordingly. , ... millions, it may change from innocuous to pathogenic, ...
(Date:9/18/2014)... tiny strands of nucleic acid that contain instructions for ... data, our DNA is copied into RNA molecules, which ... in our cells. , Several years ago, scientists ... other known RNAs, this molecule is circular, and was ... has been known about how they are produced. Moreover, ...
Breaking Biology News(10 mins):Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 2Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 3Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 4Trial begins for MRI-compatible robot designed to improve accuracy of prostate biopsies 5Researchers study vital 'on/off switches' that control when bacteria turn deadly 2Researchers study vital 'on/off switches' that control when bacteria turn deadly 3Scientists find how mysterious 'circular RNA' is formed, claim muscular dystrophy link 2
... International Osteoporosis Foundation (IOF) and the European Society for ... will hold a joint global congress, IOF WCO- ECCEO10, ... Complete programme information, online registration and abstract submission ... IOF WCO-ECCEO10 will be an excellent forum for ...
... no nervous system or brain. So how do individual ... called a biofilm "decide" between different physiological processes (such ... biofilm)? In the prestigious 2009 Fleming lecture, ... Harrogate, (Monday 30 March) Dr Nicola Stanley-Wall from the ...
... a gene that suppresses tumor growth in melanoma, the deadliest ... the journal Nature Genetics as part of a ... skin cancer and many other types of cancer. ... had changes, or mutations, in genes that code for matrix ...
Cached Biology News:Meet-the-expert sessions on 20 key topics to enhance scientific programme of IOFWCO-ECCEO10 2Skin cancer study uncovers new tumor suppressor gene 2Skin cancer study uncovers new tumor suppressor gene 3
(Date:9/20/2014)... MediVet America and NanoFiber Veterinary ... at the specialized Wolvega Horse Clinic. , Due to ... was ruptured 90% and her deep digital flexor tendon ... sentence for a horse. , The clinic has performed ... This revolutionary regenerative option for ruptured tendons has ...
(Date:9/19/2014)... light, rather than electricity, to move data would ... is a growing concern as chips, transistor counts ... optical circuits light emitters, modulators, and detectors ... promising light source for optical chips is molybdenum ... deposited as a single, atom-thick layer. Other experimental ...
(Date:9/19/2014)... , Sept. 19, 2014  Nektar Therapeutics ... from preclinical studies characterizing the analgesic profiles of ... kappa opioid receptor agonist molecules. The preclinical research ... medicinal chemistry platform. The analgesic properties ... the medical literature. 1,2 Kappa opioid receptors ...
(Date:9/19/2014)... Minnesota (PRWEB) September 19, 2014 ... related food industries will gather October 5–8, 2014, ... the Rhode Island Convention Center in Providence, Rhode ... feature the work of food scientists, chemists, microbiologists, ... control, and food production management. To date, 1,000 ...
Breaking Biology Technology:World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 2World’s first tendon replacement using Nanofiber and activated MediVet Stem Cell Fraction 3Toward optical chips 2Toward optical chips 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 5Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 2Latest Research on Cereal Grain Quality, Health Benefits and Food Production to be Presented During the AACC International Annual Meeting 3
... Inc. (Nasdaq: SGMO ) announced today that Edward ... the progress of Sangamo,s ZFP Therapeutic(TM) development programs and an ... on Wednesday, June 10, 2009 at the Eighth Annual Needham ... City. , , The presentation will be webcast live ...
... June 3 Carl Icahn announced today that Biogen is acting ... of shareholders in order the prevent the votes that have been ... to attempt to keep two of the Icahn nominees from winning ... Mulligan, a prominent scientist and physician, may be kept from legitimately ...
... SAN MATEO, Calif., June 3 NeurogesX, ... focused on developing and commercializing novel pain management therapies, ... Officer, is scheduled to present at the 8th Annual ... , , Mr. DiTonno and Stephen Ghiglieri, Chief ...
Cached Biology Technology:Sangamo BioSciences Announces Presentation at the Needham Life Sciences Conference 2NeurogesX to Present at Needham Life Sciences Conference 2NeurogesX to Present at Needham Life Sciences Conference 3
Active GST Protein...
... Cyno Serum • Cyno serum is collected off ... and 5-7 years of age. Available Anticoagulants: ... (Na) N-06: K2EDTA N-08: Potassium ... Alsevers N-05: ACD N-07: CPD ...
All serum is collected from adult animals aged 6 months or older. Certified U.S. orgin. Pricing: $35/unit for 1 - 10 units...
adult...
Biology Products: