neodymium – Shamskm: A site to exchange knowledge and solutions

Scientists solve a 14,000-year-old ocean mystery

By Guest PostJuly 30, 2013Environmentabundance of isotopes, amoeba like foraminifera, bering sea, carbon dioxide, chaetoceros diatom, China, climate change, element, fossil record, ggc 37, iron hypothesis, kamchatka peninsula, ken buesseler, last ice age, loess plateau, melting glaciers, neodymium, north pacific ocean, norway, ocean mystery, ocean with iron, pacific, perfect storm, phoebe lam, phytoplankton, post ice age, russia, sediment cores, spore, strontium, university of bergen, university of bristol, whoi

At the end of the last Ice Age, as the world began to warm, a swath of the North Pacific Ocean came to life. During a brief pulse of biological productivity 14,000 years ago, this stretch of the sea teemed with phytoplankton, amoeba-like foraminifera and other tiny creatures, who thrived in large numbers until the productivity ended—as mysteriously as it began—just a few hundred years later.

Researchers have hypothesized that iron sparked this surge of ocean life, but a new study led by Woods Hole Oceanographic Institution (WHOI) scientists and colleagues at the University of Bristol (UK), the University of Bergen (Norway), Williams College and the Lamont Doherty Earth Observatory of Columbia University suggests iron may not have played an important role after all, at least in some settings. The study, published in the journal Nature Geoscience, determines that a different mechanism—a transient “perfect storm” of nutrients and light—spurred life in the post-Ice Age Pacific. Its findings resolve conflicting ideas about the relationship between iron and biological productivity during this time period in the North Pacific—with potential implications for geo-engineering efforts to curb climate change by seeding the ocean with iron. (more…)

Prehistoric Greenhouse Data from Ocean Floor Could Predict Earth’s Future, MU Study Finds

By Guest PostOctober 29, 2011Environmenta jimenez berrocoso, atlantic ocean temperatures, atmosphere, atmospheric levels of carbon dioxide, biosphere, c basak, circulation in the deep ocean, circulation patterns, climate, e e martin, element, fish teeth and bones, geological climate cycles, greenhouse climate, greenhouse climate on earth, isaza londono, kenneth macleod, late cretaceous epoch, late cretaceous greenhouse interval, modern increases in greenhouse gases, natural tracking system for water masses, neodymium, ocean floor, oceans, salty water mass, south atlantic, tropical atlantic, university of missouri

*Evidence of water mass moving south 70 million years ago shows how warmth was distributed*

COLUMBIA, Mo. – New research from the University of Missouri indicates that Atlantic Ocean temperatures during the greenhouse climate of the Late Cretaceous Epoch were influenced by circulation in the deep ocean. These changes in circulation patterns 70 million years ago could help scientists understand the consequences of modern increases in greenhouse gases.

“We are examining ocean conditions from several past greenhouse climate intervals so that we can understand better the interactions among the atmosphere, the oceans, the biosphere, and climate,” said Kenneth MacLeod, professor of geological sciences in the College of Arts and Science. “The Late Cretaceous Epoch is a textbook example of a greenhouse climate on earth, and we have evidence that a northern water mass expanded southwards while the climate was cooling. At the same time, a warm, salty water mass that had been present throughout the greenhouse interval disappeared from the tropical Atlantic.” (more…)

USGS Releases Resource Estimate for Afghanistan Rare Earth Prospect

By Guest PostSeptember 15, 2011Economy, Environmentafghan economy, afghanistan, afghans, australia, barium, bayan obo, bob tucker, canada, cerium, China, electric vehicles, emerging alternative energy technologies, helmand province, khanneshin carbonatite, lanthanum, light rare earth elements, lree, marc grossman, marcia mcnutt, mineral wealth, mountain pass, neodymium, Pakistan, phosphorus, photo voltaic cells, rare earth element, regina dubey, steve peters, strategic minerals, strontium, U.S. Geological Survey, united states, unpublished work of soviet scientists, uranium, usgs, wind power

The U.S. Geological Survey (USGS) estimates at least 1 million metric tonnes of rare earth element resources within the Khanneshin carbonatite in Helmand Province, Afghanistan. This estimate comes from a 2009-2011 USGS study funded by the Department of Defense’s Task Force for Business and Stability Operations (TFBSO).

The Khanneshin carbonatite contains a major potential source of light rare earth elements (LREE), such as lanthanum, cerium, and neodymium. The LREE prospects in the Khanneshin carbonatite are comparable in grade to world-class deposits like Mountain Pass, CA, and Bayan Obo in China, both of which primarily contain LREE. (more…)

Rare Earth Elements: The World is Rapidly Running Out and China Has Most of The Remaining Supply

By Guest PostAugust 2, 2010Economy, Politicscalifornia, cerium, China, chinese economy, europium, green economy, hybrid car batteries, iphones, ipod, lanthanum, missile-guidance systems, mountain pass, neodymium, radar systems, rare earth elements, tantalum, us military, usgs, w david menzie

Most people have no idea what rare earth elements are, but a wide array of the technologies that we use every single day are dependent on them.

Without rare earth elements, we would have no hybrid car batteries, flat screen televisions, cell phones or iPods. Without rare earth elements, the entire “green economy” would not be able to function, because almost all emerging green technologies use them.

(more…)

Tag Archives: neodymium

Scientists solve a 14,000-year-old ocean mystery

Prehistoric Greenhouse Data from Ocean Floor Could Predict Earth’s Future, MU Study Finds

USGS Releases Resource Estimate for Afghanistan Rare Earth Prospect

Rare Earth Elements: The World is Rapidly Running Out and China Has Most of The Remaining Supply