Navigation Links
Journey to the center of the earth: Discovery sheds light on mantle formation
Date:4/11/2008

We cant exaggerate how important these rocks are theyre a window into that deep part of the Earth.

Venturing out aboard a 400-foot-long research icebreaker, Snow and his team sifted through thousands of pounds of rocks scooped up from the ocean floor by the ships dredging device. The samples were labeled and cataloged and then cut into slices thinner than a human hair to be examined under a microscope. That is when Snow realized he found something that, for many geologists, is as rare and fascinating as moon rocks mantle rocks devoid of sea floor alteration. Analysis of the isotopes of osmium, a noble metal rarer than platinum within the mantle rocks, indicated they were two billion years old. The use of osmium isotopes underscores the significance of the results, because using them for this type of analysis is still a new, innovative and difficult technique.

Since the mantle is slowly moving and churning within the Earth, geologists believe the mantle is a layer of well-mixed rock. Fresh mantle rock wells up at mid-ocean ridges to create new crust. As the tectonic plates move, this crust slowly makes its way to a subduction zone, a plate boundary where one plate slides underneath another and the crust is pushed back into the mantle from which it came.

Because this process takes about 200 million years, it was surprising to find rocks that had not been remixed inside the mantle for two billion years. The discovery of the rocks suggests the mantle is not as well-mixed or homogenous as geologists previously believed, revealing that the Earths mantle preserves an older and more complex geologic history than previously thought. This opens the possibility of exploring early events on Earth through the study of ancient rocks preserved within the Earths mantle.

The rocks were found during two expeditions Snow and his team made to the Arctic, each lasting about two months. The voyages were undertaken while Snow was a
'/>"/>

Contact: Lisa Merkl
lkmerkl@uh.edu
713-743-8192
University of Houston
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Cat fleas journey into the vacuum is a one-way trip
2. New book reveals an evolutionary journey of the human body
3. Georgia Tech/Emory Center to study origin of life
4. Woods Hole Research Center to lead undergraduate initiative in the Siberian Arctic
5. $10 million gift to support cutting-edge epigenome center at USC
6. 3 Columbia University Medical Center faculty elected to Institute of Medicine
7. NHGRI funds new Centers for Excellence in Ethical, Legal and Social Implications Research
8. NYUs Center for Genomics & Systems Biology receives $4.4 million NSF grant
9. Monsanto expands sponsorship for Peking-Yale Joint Agrobiotechnology Center
10. Woods Hole Research Center debuts new image mosaic that will strengthen global forest monitoring
11. DFG to establish 10 new collaborative research centers
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Journey to the center of the earth: Discovery sheds light on mantle formation
(Date:10/19/2014)... household electricity access in India over the last ... total carbon emissions growth during that time, according ... Nature Climate Change ., "Energy access is ... aspects of life, including education, communication, and health," ... study. , While increased energy access is widely ...
(Date:10/17/2014)... Ebola is critical and pertinent for practicing physicians and ... and epidemic. The Journal, Disaster Medicine and Public ... Virus and Public Health, to surround the public, medical ... societal moment. , On October 17, the journal ... The primer was prepared by Dr. Eric Toner, internist ...
(Date:10/16/2014)... body. Battles are won, lost or sometimes end ... as tumor dormancy—can last up to 25 years ... poorly understood. , A new computational model ... Professor of Chemistry at Princeton University, may help ... switch to a malignant state. Published today in ...
Breaking Biology News(10 mins):Improved electricity access has little impact on climate change 2Modeling tumor dormancy 2
... Researchers from Cleveland Clinic,s Wellness Institute and Harvard University ... sodas is associated with a higher risk of stroke. ... with a lower risk. The study recently ... is the first to examine soda,s effect ...
... surrounding the outside of arteries in humansparticularly the left ... or atherosclerosis, which is the leading cause of death ... the American Heart Association,s Arteriosclerosis, Thrombosis and Vascular Biology ... may help in identifying the molecular culprit, with the ...
... Scientists have identified a link between different strains of ... develop vaccines or drugs against life-threatening cases of the ... is common to many potentially fatal forms of the ... were effective against these severe malaria strains. The ...
Cached Biology News:Study finds soda consumption increases overall stroke risk 2Fat outside of arteries may influence onset of coronary artery disease 2Scientists find Achilles' heel in life-threatening malaria parasites 2
(Date:10/22/2014)... October 22, 2014 Involution Studios ... release of a new infographic, Understanding Ebola . ... a beautifully designed, easy to follow informative tool for ... of outbreak, symptoms and prevention. , "As the news ... the 2014 Ebola outbreak represents not only a healthcare ...
(Date:10/22/2014)... October 22, 2014 According to ... by Service Type (Consulting, Integration, Deployment & Support), ... Deployment Model (Public, Private, Others (Hybrid & Community)) ... defines and segments the Cloud Professional Services Market ... forecasting of revenues. It also identifies the drivers ...
(Date:10/22/2014)... KONG , Oct. 22, 2014  aTyr Pharma ... that rare disease expert John C. McKew , ... McKew brings more than two decades of expertise in ... Institutes of Health, Wyeth Research and Genetics Institute, Inc. ... aTyr,s efforts to expand and translate its novel Physiocrine ...
(Date:10/20/2014)... ON , Oct. 20, 2014 /PRNewswire/ - BIOREM Inc. (TSXV: ... $1.7 million which brings Q3 orders to $5.8 million and provides ... control projects in North America and one ... continue to bid new projects at record levels," said Peter ... were higher at the end of Q3 than they have been ...
Breaking Biology Technology:Involution Studios' Ebola Infographic Provides Key Disease Information and Statistics at a Glance 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 2aTyr Pharma Appoints John C. McKew, Ph.D., as Vice President, Research 3
... Amylin Pharmaceuticals, Inc. (Nasdaq: AMLN ... ) today announced that a supplemental New Drug Application (sNDA) ... (FDA) for the expanded use of BYETTA® (exenatide) injection as ... and/or a thiazolidinedione (TZD) in conjunction with diet and exercise ...
... Santiago de Compostela (USC) have analysed levels of radon, a ... results show that 34% of these schools exceed the limit ... of radon is associated with lung cancer. "Out of ... radon levels in excess of 400 Bequerels/m3 in some of ...
... Screening Services (ESS), announced today that they have ... Professional Background Screeners (NAPBS®) accreditation program and will ... (BSCC) Accredited. "We are so pleased ... that we can instill confidence in our existing ...
Cached Biology Technology:Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 2Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 3Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 4Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 5Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 6Amylin and Lilly Seek Expanded Use of BYETTA® Along with Basal Insulin 734 percent of Galician secondary schools exceed maximum recommended radon levels 2ESS Achieves Accreditation From Background Screening Credentialing Council 2
...
... TNT Coupled Reticulocyte Lysate Systems(a,b,c,d) offer ... vitro translations: a single-tube, coupled transcription/translation ... simplify the process and reduce the ... translation results. Standard rabbit reticulocyte lysate ...
... is a fully automated microplate luminescence ... widest possible range of applications based ... assays luciferase, -galactosidase, gene activities with ... Luminescent Immunoassays Cell-based assays ...
... These handy dispensers save space and ... and other garb. They are the ... parts used in labs, processing and ... charges and the particles they attract. ...
Biology Products: