Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2012        Go!    
 
 
April 27, Thursday 2017 3:04 AM       

       HEADLINES: Oppn to boycott Minister Mani in assembly                                              Chennithala writes to Yechury demanding Mani’s ouster                                              Pinarayi comes down heavily on strike by Pembilai Orumai                                              Assembly adjourned after uproar over Mani issue                                              Is there need for deafening horns in govt vehicles, asks Human Rights Commission                                              EVM wave, not Modi wave: AAP on losing MCD polls                                              Terrorism will recoil on those who nurture it: India                                              Poll symbol case: AIADMK leader sent to 5-day police custody                                              Terrorism will recoil on those who nurture it: India                                              20 killed in clashes in DR Congo's Kasai region: UN                                              Jadhav case: India hands over mother's appeal to Pak                                              Brilliant Uthappa powers KKR to top of IPL 10                                              Kaumudi Facebook
       SCI&TECH Next Article: Docs reconstruct tongue with flesh from thigh  
       Water exists deeper in Earth than thought: study
 
         Posted on :18:49:36 Nov 22, 2016
   
A A
       Last edited on:18:49:36 Nov 22, 2016
         Tags: Water, Earth, thought, study
 
WASHINGTON: Water exists far deeper in the Earth - about 400 to 600 kilometres into the mantle - than previously believed, researchers including one of Indian origin have found.
 
A mineral far below the surface of the Earth may hold the key to how much water is stored in our planet, researchers said.
 
Mainak Mookherjee, Assistant Professor at Florida State University in the US and Andreas Hermann from the University of Edinburgh in the UK estimate that in the deep Earth - roughly 400 to 600 kilometres into the mantle - water is stored and transported through a high-pressure polymorph of the mineral brucite.
 
Previously, scientists thought brucite was not thermodynamically stable that deep in the Earth.
 
"This opens up a Pandora's Box for us. We did not think water could be stored by hydrous minerals such as brucite. But now that we know it is there, we need to figure out how much water could be effectively stored inside it," Mookherjee said.
 
Based on high-pressure experimental studies, scientists knew minerals that transported water - such as brucite - had limited stability and that these minerals decomposed in the deep Earth.
 
As they decomposed, they released the water, which is recycled back to surface via volcanic activity.
 
However, this discovery of a new high-pressure phase of brucite indicates that water could be efficiently transported to far deeper realms without decomposition.
"We had to do quantum-mechanical calculations on thousands of potential structures until we found the one we now reported," Hermann said.
 
"It really is remarkable that such a well-studied mineral as brucite has something so surprising to offer," he said.
 
Water plays a critical role in sustaining geological activity below the Earth's surface. Scientists have been working for years to quantify the oceans' worth of water that lay hidden in the crust and mantle.
 
"For the activity of the planet, deep Earth water is equally important to water on the surface," Mookherjee said.
 
"My goal is to understand how much water is stored in the deep Earth. If the planet becomes dry on the inside, the planet dies because geodynamic activity within the planet ceases," he said.
 
The research was published in the journal PNAS.
A A
       SCI&TECH
Next Article: Docs reconstruct tongue with flesh from thigh
 
 
SCI&TECH HEADLINES
Spacecraft flies between Saturn and rings in historic 1st  
Google targets 'fake news,' offensive search suggestions  
Offensive WhatsApp posts can land group admin in jail  
Facebook for 'everyone' and not just high end: Zuckerberg  
Google Earth re-invented for new era  
NASA images show how India looks from space at night  
Signs of life detected below world's deepest point  
'iPhones assembly in Bengaluru by Apple in less than a month'  
Five astronauts assigned to future ISS mission: NASA  
Trump plans to send humans to Mars  
First patient cured of rare blood disorder'  
Indian-American teen wins top science award worth USD 250,000  
'New extension may improve inflight WiFi'  
Frogs can see colour in extreme darkness: study  
NASA may put astronauts on deep space test flight  
Juno to remain in current orbit around Jupiter: NASA  
US man receives new face from donor  
Over 100 new potential planets spotted  
ISRO to launch record 104 satellites on Feb 15  
Now, video-makers can live stream on YouTube  
Music, drugs stimulate same part of brain: study  
Facebook adds tool for helping in times of crisis  
Moon may have formed from collision of tiny 'moonlets'  
China to set up world's highest altitude telescopes in Tibet  
NASA to launch two robotic probes to study early solar system  
 
Should Senkumar be reinstated as DGP, law and order?
yes
 
no
 
don't know
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy