Navigation Links
Continents loss to oceans boosts staying power
Date:4/1/2008

HOUSTON, April 1, 2008 -- New research suggests that the geological staying power of continents comes partly from their losing battle with the Earth's oceans over magnesium. The research finds continents lose more than 20 percent of their initial mass via chemical reactions involving the Earth's crust, water and atmosphere. Because much of the lost mass is dominated by magnesium and calcium, continents ultimately gain because the lighter, silicon-rich rock that's left behind is buoyed up by denser rock beneath the Earth's crust.

The Earth's continents seem like fixtures, having changed little throughout recorded human history. But geologists know that continents have come and gone during the Earth's 4.5 billion years. However, there are more theories than hard data about some of the key processes that govern continents' lives.

"Continents are built by new rock that wells up from volcanoes in island arcs like Japan," said lead author Cin-Ty Lee, assistant professor of Earth science at Rice University. "In addition to chemical weathering at the Earths surface, we know that some magnesium is also lost due to destabilizing convective forces beneath these arcs."

Lee's research, which appeared in the March 24 issue of the Proceedings of the National Academy of Science, marks the first attempt to precisely nail down how much magnesium is lost through two markedly different routes -- destabilizing convective forces deep inside the Earth and chemical weathering reactions on its surface. Lee said the project might not have happened at all if it weren't for some laboratory serendipity.

"I'd acquired some tourmaline samples in San Diego with my childhood mentor, Doug Morton," Lee said. "We were adding to our rock collections, like kids, but when I got back to the lab, I was curious where the lithium, a major element in tourmaline, needed to make the tourmalines came from. I decided to measure the lithium content in the granitic rocks fro
'/>"/>

Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert

Page: 1 2

Related biology news :

1. Climate change has major impact on oceans
2. First map of threats to marine ecosystems shows all the worlds oceans are affected
3. Oceans Past: A Guide to Oceans Future
4. Deep-sea species loss could lead to oceans collapse, study suggests
5. Coral reefs unlikely to survive in acid oceans
6. Unprecedented global measurement network achieves full coverage of oceans
7. Scientists gather in New Zealand to share oceans secrets
8. Acid oceans warning
9. NASA celebrates a decade observing climate impacts on health of worlds oceans
10. NASA celebrates a decade observing climate impacts on health of worlds oceans
11. Nitrogen pollution boosts plant growth in tropics by 20 percent
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/28/2014)... a handful of bacterial culprits that may drive inflammatory ... colitis, using patients, own intestinal immune responses as a ... the journal Cell . , Trillions of bacteria ... critical role in the development and progression of IBD. ... bacterial species affect a person,s susceptibility to IBD and ...
(Date:8/28/2014)... researcher and his collaborators have developed an online analytic ... of re-engineering cells for biomedical investigation. CellNet is a ... aid stem cell engineering. Details of CellNet and its ... back-to-back papers in the journal Cell . , ... for all types of cell-based investigations and can potentially ...
(Date:8/28/2014)... Aug. 28, 2014  Privacy Advocate and Senior Staff ... Lynch , joins the lineup of biometric and mobile ... Biometrics UnPlugged Executive Summit in Tampa, Florida ... Previously announced speakers include Steven Rahman, Director, Technology and Strategy ... at Experian. The theme of this year,s event is ...
Breaking Biology News(10 mins):Yale study identifies possible bacterial drivers of IBD 2New tool aids stem cell engineering for medical research 2Biometrics UnPlugged Welcomes the Electronic Frontier Foundation's Jennifer Lynch to the Mobility at the Crossroads of Commerce and Privacy Summit 2
... Chemical changes in tree leaves subjected to warmer, drier ... the availability of soil nutrients, according to a Purdue ... forestry and natural resources, found that red maple leaves ... hot, droughtlike conditions. Those tannins, which defend leaves from ...
... A very simple bench-top technique that uses the ... of 3D structures will benefit the rapidly expanding ... cloaks." Metamaterials are artificial materials that are ... Thesematerials usually gain their unusual propertiessuch as negative ...
... CORVALLIS, Ore. The long-standing conflicts over nuclear power ... in fact, the debate over the damaged Fukushima Dai-Ichi plant ... agencies and the public since 1945, according to an Oregon ... Jacob Hamblin is the author of the 2008 book, "Poison ...
Cached Biology News:Drought-exposed leaves adversely affect soil nutrients, study shows 2Force of acoustical waves tapped for metamaterials 2Historian says history of nuclear power needs to be addressed 2
(Date:8/28/2014)... PARK, Calif. , Aug. 28, 2014 /PRNewswire/ ... focused on developing novel mid- to late-stage cardiovascular ... $7.0 million in its first round of financing. ... Biomedical Investments and Hercules Bioventures with participation from ... entrepreneur and pharmaceutical executive, Dr. Larry Hsu ...
(Date:8/28/2014)... Scientists, researchers, and technologists will converge in ... 2014 symposium. Marking its 46th year, the annual ... 14-17 September. The event is sponsored by SPIE, ... The premier conference for basic and applied issues which ... will engage researchers and engineers from numerous industries and ...
(Date:8/28/2014)... August 28, 2014 Earlier this month, ... in partnership with the U.S. Air Force on ... The results indicated that this type of fuel made ... and will be important to America’s Eco friendly future. ... has a mandate to become independent of foreign oil ...
(Date:8/28/2014)... 28, 2014 Supplementing their complete ... promotion for Eppendorf Safe Lock Centrifuge Tubes ... the highest quality tubes at an affordable price. ... customers doing chemical, medical, pharmaceutical, and life science ... not regularly able to afford Eppendorf products. , ...
Breaking Biology Technology:Armetheon Completes $7.0 Million Series A Financing 2Armetheon Completes $7.0 Million Series A Financing 3Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 2Laser Damage to Draw Researchers, Engineers, Scientists to 46th Annual Conference 3Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 2Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 3Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 4Can Small Farmers and a New Seed Based Biofuel “Green” the World? Major Universities and Even the U.S. Air Force Seem to Think So 5Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 2Eppendorf Safe Lock Centrifuge Tube Promotion Now Available at Major Pipette Distributor Pipette.com 3
... LONDON, May 6, 2011 Trimega Laboratories is ... European Business Awards, sponsored by HSBC, to represent the United ... Trimega,s pioneering use of dual testing of hair ... Trimega Laboratories, said: "We are thrilled to be selected to ...
... May 6, 2011 Last week in Alexandria, VA, ... of Grants and Acquisition Policy and Accountability (OGAPA) recognized ... its Niche Assessment Program) for a special "team" recognition ... in bringing their applications to market and "contributing to ...
... Researchers in the Materials Science and Technology division ... electrical injection, detection and precession of spin accumulation ... technology, at temperatures up to 225 degrees Celsius. ... accumulation in Si is viable as a basis ...
Cached Biology Technology:Trimega Laboratories to Represent UK in Europe's Most Competitive Business Awards Competition 2Larta Institute Receives Award for National Institutes of Health Commercialization Assistance Program at 2011 Acquisition, Grants, and Small Business Symposium 2NRL scientists achieve high temperature milestone in silicon spintronics 2NRL scientists achieve high temperature milestone in silicon spintronics 3
... Labsystems' Wellwash AC is the ... washer available, and is provided ... wash, waste and rinse bottles. ... automatic rinsing and priming functions ...
... polyclonal to MLF1 Interacting Protein/PBIP1 (phospho ... tested applications). Antigen: ... amino acids 73-83 of Human MLF1 ... Gene ID: 359815 ...
... These handy dispensers save space ... hats, and other garb. They are ... small parts used in labs, processing ... static charges and the particles they ...
... dispensers save space and organize ... and other garb. They are ... for small parts used in ... acrylic. Many other sizes and ...
Biology Products: