Sentences with word «phyllosilicate»

A study that appeared in the 2013 Fall meeting of the American Geophysical Union in San Francisco, Calif., by a team led by Jim Shirley, a research scientist at NASA's Jet Propulsion Laboratory, presented evidence for the existence of a narrow ring of phyllosilicates on the moon's surface, which were uncovered through an analysis of photographs taken with Galileo's Near - Infrared Mapping Spectrometer.

The best match for the spectra proved to be something De Sanctis and her team hadn't even been looking for — clay - like minerals called ammoniated phyllosilicates.

Ammonia, accreted either as organic matter or as ice, may have reacted with phyllosilicates on Ceres during differentiation.

Like the fine grains sampled in the Aru avalanche debris, Martian dust is talcum powder - sized particles of platy phyllosilicate minerals.

The data provides a global geological map of the asteroid showing that its entire surface appears to be covered in phyllosilicates, an important group of clay minerals.

Mineralogist Richard Morris of the NASA Johnson Space Center says, «For something as important as phyllosilicates, I'd like to see two things point to it» — that is, two independent lines of evidence.

«Our measurements indicate widespread ammoniated phyllosilicates across the surface, but no detectable water ice.

Together, this new set of information shows that Ceres is a world that has been shaped by a series of events, with a strong crust of magnesium - and ammonium - bearing phyllosilicates overlying an interior of briny ice and hydrated minerals.

This shallow angle would have permitted some of the ejected material from the collision to fall back on the surface, spraying it with the observed phyllosilicate traces.

Kargel noted a lot of phyllosilicates in the samples collected: «These are clay minerals, platy minerals like mica that can form a very slippery material... like talcum powder,» he says.

«But I'm not fully convinced about the interpretation of ammoniated phyllosilicates.»

It first detected clays (technically called phyllosilicates) last year, but the data were spotty, and some scientists wondered whether the clays were merely superficial layers, the result of gradual weathering rather than thorough soaking.

«On Earth and on Mars, we know that the presence of phyllosilicates — clays — or other hydrated minerals indicates formation in liquid water,» Jorge Núñez, who led the study, said in a NASA press release.

Although Ceres» phyllosilicates are uniform in their composition, there are marked differences in how abundant these materials are on the surface.

A study led by Eleonora Ammannito of the University of California, Los Angeles, finds that clay - forming minerals called phyllosilicates are all over Ceres.

For example, phyllosilicates are especially prevalent in the region around the smooth, «pancake» - like crater Kerwan (174 miles, 280 kilometers in diameter), and less so at Yalode Crater (162 miles, 260 kilometers in diameter), which has areas of both smooth and rugged terrain around it.

These phyllosilicates are rich in magnesium and also have some ammonium embedded in their crystalline structure.

One of these, phyllosilicate, forms as liquid water interacts with volcanic rock over thousands of years.

One of the surprises found on Ceres was the presence of ammonia in the phyllosilicates.

Dawn has also found evidence for clay minerals, or phyllosilicates, on Ceres, using the visible and infrared mapping spectrometer instrument (VIR).

They are part of a group of layered silicate minerals, called phyllosilicates, which now I think of it must be where the term filo or phyllo pastry comes from.

Last year, in a Nature study, De Sanctis» team reported that the surface of Ceres contains ammoniated phyllosilicates, or clays containing ammonia.

Phyllosilicates are clay - like minerals, formed in the presence of a neutral - pH water, and are indicative of a habitable environment.

What Shirley and his colleagues noticed by examining Galileo's images was that the phyllosilicates on Europa laid 120 km away from a 20 - km - wide crater on the moon's surface.

The crater - covered plateau is peppered with light and dark deposits, the lightest of which contain chunks of clay minerals called phyllosilicates.

Bentonite is a phyllosilicate that does a lot of good to the skin and the fur of your pets.