Navigation Links
Extraterrestrial platinum was 'stirred' into the Earth
Date:7/31/2009

A research program aimed at using platinum as an exploration guide for nickel has for the first time been able to put a time scale on the planet's large-scale convection processes.

The research is reported in a Nature paper titled "Progressive mixing of meteoritic veneer into the early Earth's deep mantle".

Report author CSIRO Minerals Down Under Flagship researcher Dr Stephen Barnes said the study group collected a large body of data on the platinum content of lava flows called komatiites, which host some of the world's major nickel deposits.

"We found that the oldest komatiites have the lowest platinum content," Dr Barnes said.

"The platinum content gradually increases from about 3.5 billion years to 2.9 billion years ago. "This tells us that the deep source where the komatiite came from, down near the boundary between the Earth's core and mantle, was gradually gaining platinum over time".

The paper's authors now think they know why.

"When the Earth's core formed, it took all the available platinum with it, leaving the mantle and crust with none," Dr Barnes said.

"Following that, a steady rain of meteorites created the so-called Late Veneer a thin surface layer of meteorite debris rich in platinum."

With time through large-scale convection processes, which now cause plate tectonics, this material was stirred down into the interior of the Earth.

We are seeing the signal of that stirring, which took about 1.5 billion years to occur.

This is the first time a time scale has been put on the stirring, which has important implications for the people who study the dynamics of mantle processes and the mechanisms that cause plate tectonics, earthquakes and volcanoes.

Combined with some other work by the researchers on sister elements to platinum, iridium and osmium, we also now have a new framework for understanding the variations in isotopic ratios of osmium with time.

Osmium isotopes are widely
'/>"/>

Contact: Bob Chamberlain
Bob.Chamberlain@csiro.au
073-327-4469
CSIRO Australia
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Research team says extraterrestrial impact to blame for Ice Age extinctions
2. A tiny frozen microbe may hold clues to extraterrestrial life
3. Platinum Solutions, Inc. Teams with Lockheed Martin on Federal Bureau of Investigations Next Generation Identification Program
4. Global Warming and the Habitability of Planet Earth, Sept. 26
5. Good earth: Brown chemists show origin of soil-scented geosmin
6. Scientists launch deep-sea scientific drilling program to study volatile earthquake zone
7. Biogeochemistry -- A window into the Earths ecological health
8. How did chemical constituents essential to life arise on primitive Earth?
9. Scientists warn that species extinction could reduce productivity of plants on Earth by half
10. Earth Observation essential for geohazard mitigation
11. Liquid crystal phases of tiny DNA molecules point up new scenario for first life on Earth
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Extraterrestrial platinum was 'stirred' into the Earth
(Date:7/23/2014)... Pfenex Inc. (NYSE MKT: PFNX) today announced the pricing of ... stock at a price to the public of $6.00 per ... option to purchase up to 1,250,000 additional shares of common ... expected to begin trading on the NYSE MKT on July ... Blair & Company, L.L.C. and JMP Securities LLC are ...
(Date:7/23/2014)... that early reading skill might positively affect later intellectual ... , was conducted by researchers at the University of ... an ability that can be improved, our findings have ... research fellow in psychology at the University of Edinburgh, ... might aid not only the growth of literacy, but ...
(Date:7/23/2014)... or neglected early in life are at risk ... In a new study, scientists have found that ... has implications for children,s long-term development. Previous studies ... and genetics interacted with that child,s experiences in ... In the new study, researchers were able to ...
Breaking Biology News(10 mins):Pfenex Inc. Announces Pricing Of Initial Public Offering 2Stronger early reading skills predict higher intelligence later 2Stress tied to change in children's gene expression related to emotion regulation, physical health 2Stress tied to change in children's gene expression related to emotion regulation, physical health 3
... Research from Queen,s University Belfast has revealed the 20th ... certainly associated with changes in farming practices. The ... Ireland last Tuesday (22nd June), but a recent study, ... published in the international journal Biological Conservation , ...
... U.S. Department of Energy has awarded a consortium of universities ... to $9 million over the next three years to conduct ... from algae a viable and competitive alternative to gasoline for ... funds are being supplemented by $3 million from a consortium ...
... brain, scientists can alleviate the effects of disorders such ... news. But because controlling that stimulation currently lacks ... of its therapeutic benefits for the patient over time. ... of a European consortium, is delving deep into human ...
Cached Biology News:Irish hares fall foul of modern farming trap 2DOE awards UC San Diego consortium $9 million for algal biofuels research 2A pacemaker for your brain 2
(Date:7/23/2014)... San Diego, California (PRWEB) July 23, 2014 ... per second in HD resolution for more than 15 minutes, ... cameras to the world of high speed imaging. “Finally, a ... any other camera we use in our everyday lives.” proclaims ... goal at Fastec has always been to demystify and simplify ...
(Date:7/23/2014)... 23, 2014 Adult stem cells ... are biological, but not magical. However, many ... treat them as if they were magical. , ... studies that constitute “stem cell tourism,” are evaluating ... to developing new regenerative medicine therapies. In reality, ...
(Date:7/22/2014)... -- The Board of Directors of BD (Becton, Dickinson and ... dividend of 54.5 cents per common share payable on September ... The indicated annual dividend rate is $2.18 per share. ... medical technology company that partners with customers and stakeholders to ... needs. Our innovative solutions are focused on improving drug delivery, ...
(Date:7/22/2014)... in water with ultrasound and they,ll spin around their ... yet knows exactly. But researchers at the National Institute ... it,s fast. At up to 150,000 revolutions per minute, ... object submerged in liquid ever reported. , The discovery ... that they could be used not only for moving ...
Breaking Biology Technology:Fastec Imaging Introduces the First High Speed Camcorder 2Fastec Imaging Introduces the First High Speed Camcorder 3The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 2The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 3The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 4The Adult Stem Cell Technology Center, LLC Continues to Develop Technologies for Homologous Adult Stem Cell Therapies and Drug Development 5NIST shows ultrasonically propelled nanorods spin dizzyingly fast 2
... Inc have successfully implemented Amphora,s PatentSafe solution to ... PatentSafe as a fully electronic lab notebook, with ... efficiently into today,s laboratories but it also allows ... and effectively, saving significant time previously spent on ...
... Sky One,Medical, Inc. ("China Sky One Medical" or "the ... pharmaceutical company producing over-the-counter,drugs in the People,s Republic of ... quarter and fiscal year ended December 31,2008. , , ... -- Total revenues increased 104.0% year-over-year to $26.0 ...
... Hovione is pleased to announce,that its licensee Daiichi ... use Hovione,s TwinCaps(R) dry powder inhaler device in ... neuraminidase inhibitor active,against the influenza virus. Daiichi Sankyo ... in Japan and other Asian countries and results,are ...
Cached Biology Technology:Solidus Bioscience Protect their Research and Improve Efficiency With Amphora's PatentSafe Solution 2Solidus Bioscience Protect their Research and Improve Efficiency With Amphora's PatentSafe Solution 3China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 2China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 3China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 4China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 5China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 6China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 7China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 8China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 9China Sky One Medical, Inc. Announces Record Fourth Quarter and Fiscal Year 2008 Results 10Hovione's TwinCaps(R) Inhaler in Phase III Clinical Trials for Influenza 2Hovione's TwinCaps(R) Inhaler in Phase III Clinical Trials for Influenza 3
FITC~Bovine Serum Albumin...
... Ambion's custom siRNA service provides the premium ... silencing research. Custom siRNAs can be readily ... base target sequence, or by providing the ... out Ambion's Silencer Validated and Silencer Pre-designed ...
, Premium quality synthesis and purification , You provide the sequence, we'll do the rest , Rigorous quality control , Your choice of purification method, amount and format , Available annealed...
Ready for formulation or direct injection into animals Provided in convenient 100, 250, 1000 and 10,000 nmol sizes HPLC purified, salt free, sterile filtered, and endotoxin tested ...
Biology Products: