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Earth and Planetary Science Letters, 24 (1974) 1-14 North-Holland Publishing Company, Amsterdam - Printed in The Netherlands FAEROE-ICELAND PLUME: RARE-EARTH EVIDENCE J-G. SCHILLING Graduate School of Oceanography, University of Rhode Island Kingston, R.I. (U.S.A.) and A. NOE-NYGAARD Mineralogical Museum, Copenhagen (Denmark) Received June 5, 1974 Revised …
Rare earth elements are an essential part of many high-tech devices. The U.S. Geological Survey news release "Going Critical" explains: "Rare-earth elements (REE) are necessary components of more than 200 products across a wide range of applications, especially high-tech consumer products, such as cellular telephones, computer hard drives ...
The seemingly barren moon may actually be a treasure-trove of priceless resources: a potentially bountiful, mineral-rich – yet untapped – cosmic quarry. Still, few see the moon as an alluring mining site, ripe for the picking of rare elements of strategic and national security importance. Here on Earth, China recently blocked the export of rare earth elements to Japan for use in an array ...
The Zhijin phosphorite deposit is a giant early Cambrian rare earth element (REE) deposit, with particular enrichment in heavy REEs, and is of high economic significance. The REEs of the deposit occur almost entirely in apatite, which, on the basis of petrographic characteristics, can be divided into francolite grains (90%), amorphous apatite, and phosphate fossils.
Scientists have discovered an unexpected mineral in a rock sample at Gale Crater on Mars, a finding that may alter our understanding of how the planet evolved. NASA's Mars Science Laboratory rover, Curiosity, has been exploring sedimentary rocks within Gale Crater since landing in August 2012. On sol 1060 (the number of Martian days since ...
I. Ardizzone and D. van der Marel, University of Geneva, and M. Medarde, Paul Scherrer Institut, sat down with the Physical Review Journal Club for a discu...
The Rare Earth hypothesis. Ever since the pioneering work of Frank Drake (1930-) in 1960, astronomers have been looking for radio signals from extraterrestrial civilisations and have failed to find anything. This could be because Earth-like planets containing complex life forms (such as ourselves) are rare in the Universe and only a series of ...
Rare earth element patterns of carbonado and yakutite: evidence for their crustal origin - Volume 57 Issue 389. Skip to main content Accessibility help We use cookies to distinguish you from other users and to provide you with a better experience on our websites.
But there's much more to the story than that. When it comes to mining rare earths, China's lead becomes dominant. Indeed, over 70 percent of rare earths are …
The rare earth elements (REEs) are commonly defined as lanthanum (La) and the 14 elements comprising the Lanthanide series. The REE's typically exhibit trivalent oxidation states; however, Europium may also occur as Eu 2+ and Cerium may occur as Ce 4+ . The REE's ionic radii decrease on progression from La to Lu, which results in a slight but predictable change in their chemical affinity.
Menzies M (1976) Rifting of a tethyan continent — Rare earth evidence of an accreting plate margin, Earth and Planetary Science Letters, 10.1016/0012-821X(76)90204-1, 28:3, (427-438), Online publication date: 1-Jan-1976.
The term "Rare Earth" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist. An alternative viewpoint was argued by Carl Sagan and Frank Drake, among others. It holds that Earth …
Influence of the discovery and Shona mantle plumes on the southern Mid-Atlantic Ridge: Rare earth evidence. Download. GEOPHYSICAL RESEARCH LETTERS, VOL. 22, NO. 21, PAGES 2893-2896, NOVEMBER 1, 1995 Influence of the Discovery and Shona mantle plumes on the southern Mid-Atlantic Ridge: Rare earth evidence J. Douglass,J-G. Schilling,andR. H ...
The rare-earth elements, also called the rare-earth metals or (in context) rare-earth oxides, or the lanthanides (though yttrium and scandium are usually included as rare-earths) are a set of 17 nearly-indistinguishable lustrous silvery-white soft heavy metals. Scandium and yttrium are considered rare-earth elements because they tend to occur in the same ore deposits as the lanthanides and ...
The compounds have a rare-earth site that is occupied by five different rare-earth elements, while the transition metal site is occupied by a single transition metal. In this way, a comparison to the parent binary oxides, namely, the orthocobaltites, -chromites, and -ferrites, is possible.
The extensive use of rare earth elements (REEs) in a number of technologies is expected to impact on human health, including occupational and environmental REE exposures. A body of experimental evidence on REE-associated toxicity has been accumulated in recent decades, thus …
The "rare" in the name of this group of elements is actually somewhat misleading; the U.S. Geological Survey describes them as "relatively abundant in the Earth's crust." But extraction is ...
The Rare Earth hypothesis suggests that Earth-like planets containing complex (animal) life as we know it are likely quite rare in the Universe. This lesson will explore several parameters that have led the scientists Peter Ward and Donald Brownlee to put forth this hypothesis in their book, Rare Earth: Why Complex Life is Uncommon in the Universe.
Rare Earth proponents argue that plate tectonics and a strong magnetic field are essential for biodiversity, global temperature regulation, and the carbon cycle. The lack of mountain chains elsewhere in the Solar System is direct evidence that Earth is the only body with plate tectonics, and thus the only nearby body capable of supporting life.
A systematic survey of rare-earth (r.e.) abundances in submarine tholeiitic basalts along mid-oceanic ridges has been made by neutron activation analysis. The r.e. fractionation patterns are remarkably uniform along each mid-oceanic ridge and from one ridge to another (Juan de Fuca Ridge, East Pacific and Chile Rise, Pacific-Antarctic, Mid-Indian and Carlsberg Ridge, Gulf of Aden, Red Sea ...
1. Science. 1969 Sep 26;165(3900):1357-60. Red sea floor origin: rare-Earth evidence. Schilling JG. Abundance patterns of rare earths of submarine tholeiitic basalts from the axial trough of the Red Sea resemble those of basalts from mid-ocean ridges but are distinct from shield or plateau basalts of …
PDF | Rare earths (RE) in basalts erupted within the rift of the Mid-Atlantic Ridge show a progressive change from light-RE enriched to depleted... | Find, read and cite all the research you need ...
Materials Science and Engineering A 422 (2006) 66–76 Experimental evidence of the impact of rare-earth elements on particle growth and mechanical behaviour of silicon nitride Rapha¨elle L. Satet a,∗, Michael J. Hoffmann a, Rowland M. Cannon b a Institut f¨ur Keramik im Maschinenbau, Universit¨at Karlsruhe (TH), Haid-und-Neu-Strasse 7, D-76131 Karlsruhe, Germany b Materials Sciences ...
Among these critical elements, rare earth elements (REE) form a group of fifteen elements (from La to Lu on the periodic table) necessary for applications in the low-carbon energy sector (e.g., batteries, magnets, low-energy lighting, wind turbines), industry (e.g., alloys, catalysis, oil refining), and other technologies (e.g., lasers, optics). More than 90% of REEs produced worldwide in the ...
The world economy, still suffering from the financial crisis, is currently experiencing increasing commodity prices. Industrial associations and governments are monitoring patterns of supply and demand, not only for standard minerals like iron, but also for high-value metals (e.g., nickel, copper, titanium, gold) and rare earth elements (REE) like yttrium, indium, gallium, neodymium, and ...
Nagasawa, H.: Rare earth concentration in zircon and apatite and their host dacite and granites. Earth Planet. Sci. Lett. 9, 359–364 (1970) Google Scholar Nagasawa, H.: Rare-earth distribution in alkali rocks from Oki-Dogo Island, Japan. Contr. Mineral. Petrol. 39, 301–308 (1973) Google Scholar
Old Earth Creationism. The basic idea behind Old Earth Creationism is that the word "day" in the Genesis creation account need not be a literal 24 hours. Here, "day" is taken as a metaphor for a long period of time, or interpreted as an "age" since the Hebrew word "yom" can have either meaning. There is a lot of scriptural, as well as ...
Rare earth element (REE) and major element data are presented on 44 Archaean samples which include spinifex textured ultramagnesian lavas (STPK) spinifex textured basalts (STB) and low MgO tholeiites.
Recent evidence tells us that the earth is unique in many ways, even compared to the other rocky planets in our Solar System. In a recent study ( 3 ), Dr. Roberta Rudnick says that the earth has a unique continental crust, which is different from any other planet in …
The rare earth nickelates $mat{R}mat{Ni}{mat{O}}_{3}$ are metallic at high temperatures and insulating and magnetically ordered at low temperatures. The low temperature phase has been predicted to be type II multiferroic, i.e., ferroelectric and magnetic order are coupled and occur simultaneously. Confirmation of those ideas has been inhibited by the absence of experimental data …
The term "Rare Earth" originates from Rare Earth: Why Complex Life Is Uncommon in the Universe (2000), a book by Peter Ward, a geologist and paleontologist, and Donald E. Brownlee, an astronomer and astrobiologist. An alternative viewpoint was argued by Carl Sagan and Frank Drake, among others. It holds that Earth is a typical rocky planet ...