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Latest Mass-independent fractionation Stories

Earthen Crust Oxygen Got Its Start During Creation Of Solar System
2013-10-25 07:03:56

April Flowers for redOrbit.com - Your Universe Online A long standing mystery in the formation of the Solar System has been solved by cosmochemists from the University of California, San Diego (UCSD). In the oldest, most pristine rocks, oxygen, the most abundant element in the Earth's crust, follows a strange, anomalous pattern that must result from a different chemical process than the well-understood reactions that form minerals containing oxygen on Earth. "Whatever the source of...

Possibility Of A More Dynamic Biological Oxygen Cycle On The Early Earth Than Previously Thought
2013-04-25 10:22:56

University of California, Riverside A research team of biogeochemists at the University of California, Riverside has provided a new view on the relationship between the earliest accumulation of oxygen in the atmosphere, arguably the most important biological event in Earth history, and its relationship to the sulfur cycle. A general consensus exists that appreciable oxygen first accumulated in Earth's atmosphere around 2.4 to 2.3 billion years ago. Though this paradigm is built upon a...

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2011-01-20 14:00:29

An international research team working with National Institute of Standards and Technology (NIST) scientists at the Hollings Marine Laboratory (HML) in Charleston, S.C., has suggested for the first time that mercury cycling in the flora and fauna of the Arctic may be linked to the amount of ice cover present. Their study* is the latest work reported from the Seabird Tissue Archival and Monitoring Project (STAMP), a multiyear joint effort of NIST, the U.S. Fish and Wildlife Service (USFWS),...

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2010-11-08 14:27:45

By Kim McDonald, UC San Diego Chemists at UC San Diego have uncovered a new chemical reaction on tiny particulates in the atmosphere that could allow scientists to gain a glimpse from ancient rocks of what the atmospheres of the Earth and Mars were like hundreds of millions years ago. Their discovery also provides a simple chemical explanation for the unusual carbonate inclusions found in a meteorite from Mars that was once thought by some scientists to be evidence of ancient Martian life....

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2010-02-11 11:20:00

A study by University of Michigan researchers offers new insight into what happens to mercury deposited onto Arctic snow from the atmosphere. The work also provides a new approach to tracking mercury's movement through Arctic ecosystems. Mercury is a naturally occurring element, but some 2000 tons of it enter the global environment each year from human-generated sources such as coal-burning power plants, incinerators and chlorine-producing plants. "When released into the atmosphere in its...

2009-04-16 15:05:10

U.S. researchers say a study of sedimentary rocks created more than 2.4 billion years ago suggests the Earth had an early, oxygen-rich atmosphere. Pennsylvania State University researcher Yumiko Watanabe said rocks sometimes have an unusual sulfur isotope composition thought to be caused by the action of ultra violet light on volcanically produced sulfur dioxide in an oxygen poor atmosphere. But the team of geochemists said they can show an alternative origin for that isotopic composition...

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2008-10-10 12:47:08

University of Michigan researchers have developed a new tool that uses natural "fingerprints" in coal to track down sources of mercury polluting the environment. The research is published in today's online issue of the journal Environmental Science & Technology. Mercury is a naturally occurring element, but some 2000 tons of it enter the environment each year from human-generated sources such as incinerators, chlorine-producing plants and coal-burning power plants. Mercury is deposited...

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2008-09-08 09:35:00

Results critical to interpretation of GENESIS spacecraft samples of the sun A strange mix of oxygen found in a stony meteorite that exploded over Pueblito de Allende, Mexico nearly 40 years ago has puzzled scientists ever since. Small flecks of minerals lodged in the stone and thought to date from the beginning of the solar system have a pattern of oxygen types, or isotopes, that differs from those found in all known planetary rocks, including those from Earth, its Moon and meteorites from...

2005-08-11 19:35:00

From chemical fingerprints preserved in primitive meteorites, scientists at UCSD have determined that the collapsing gas cloud that eventually became our sun was glowing brightly during the formation of the first material in the solar system more than 4.5 billion years ago. Their discovery, detailed in a paper that appears in the August 12 issue of Science, provides the first conclusive evidence that this "protosun" played a major role in chemically shaping the solar system by emitting enough...

2005-08-11 13:38:32

WASHINGTON (Reuters) - Our Sun was already shining brightly more than 4.5 billion years ago, as dust and gas was swirling into what would become the planets of the solar system, U.S. researchers reported on Thursday. They said their finding is the first conclusive evidence that the so-called protosun affected the developing the solar system by emitting enough ultraviolet energy to catalyze the formation of organic compounds, water and other elements necessary for the evolution of...


Word of the Day
grass-comber
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'