Sentences with phrase «postimpact hydrothermal activity»

We found that the particles seen in our images, which were droplets of ocean only hours earlier, bore evidence of large organic molecules and compounds that indicated hydrothermal activity similar to that observed at deep - sea vents on Earth's seafloor.

Those analyses are likely to take several weeks, but should provide important insights about the composition of the global ocean beneath Enceladus» surface and any hydrothermal activity occurring on the ocean floor.

While hydrothermal activity can produce considerable quantities of hydrogen, in porous rocks often found under seafloors, radiolysis could produce copious amounts as well.

But the signal is contested, and there's no evidence yet of hydrothermal activity.

The authors argue that it comes from hydrothermal activity on the ocean floor, perhaps seafloor vents like those on Earth that spew H2 and support rich microbial life.

Impacts exposing subsurface ice deposits and generating hydrothermal activity are one possible explanation for the bright spots and Herschel's water vapor; «cryovolcanoes» that erupt volatiles such as water rather than rock are another.

Suggestions of hydrothermal activity on Europa led researchers to speculate that life there could resemble ecosystems around hydrothermal vents on Earth and would survive on chemosynthesis, extracting energy from chemicals.

Geologists call this hydrothermal activity.

He is head of the Centre for Geobiology, which examines volcanic hydrothermal activity and the formation of the mineral resources.

The Dawn probe has previously detected salts, ammonia - rich clays and water ice on Ceres, which together indicate hydrothermal activity, says study coauthor Carol Raymond, a planetary scientist

Ancient impact craters on Mars were probably also home to hydrothermal activity, making them good places to search for signs of life, the team reports online February 19 in Geochimica et Cosmochimica Acta.

Key hypotheses of the origin of this soil include hydrothermal activity generating sulfate - rich, hydrated deposits on early Mars similar to what is found along the flanks of active Hawaiian volcanoes on Earth.

In 2015, the researchers had already shown that there must be hydrothermal activity on Saturn's moon.

This is partially because oxygen, which causes the iron to precipitate, had not yet entered the ocean to great depths, and also because the seafloor at that time contained abundant iron released by bursts of hydrothermal activity.

Heat from the friction of rocks caused by tidal forces could be the «engine» for the hydrothermal activity on Saturn's moon Enceladus.

Formation of metallic ore deposits are predicted to accompany the underwater hydrothermal activity, so the team also plan to evaluate these undersea resources.

Fuel - coolant reactions deposited volcanic rocks and promoted hydrothermal activity.

Given that the tubules seem to be associated with fractures and water - cooled margins within the rocks, the researchers propose that hydrothermal activity — the local circulation of heated water, common after impacts — could have allowed microbial colonization of the glass from the surrounding environment.

The paper from researchers with the Cassini mission, published in the journal Science, indicates hydrogen gas, which could potentially provide a chemical energy source for life, is pouring into the subsurface ocean of Enceladus from hydrothermal activity on the seafloor.

They announced strong evidence for a regional sea in 2014, and more recently, in 2015, they shared results that suggest hydrothermal activity is taking place on the ocean floor.

But he says there is not yet enough evidence to know whether the icy moon boasts hydrothermal activity, which would provide energy and key elements necessary for life.

Evaporation of water or ice seems to be involved, but whether the spots formed after impacts or perhaps hydrothermal activity isn't clear yet.

Scientists believe the ocean exists as the result of heat generated by hydrothermal activity the moon's interior.

The presence of hydrothermal activity in Enceladus that could last for such a long time has major implications for the potential for life to evolve.

NE Syrtis is an impact crater that may have hosted hydrothermal activity for some time in the distant past.

«If a new theory published last year is correct, then powerful hydrothermal activity could have been occurring since the formation of the moon, possibly as much as the age of the solar system,» he says, adding that which timescale they are working on — tens of millions or billions — could be determined with future research.

View of Enceladus's subsurface ocean and hydrothermal activity Credit: NASA / JPL - Caltech / Space Science Institute

«All or most of the biological activity that we've seen is coming from the region that apparently has some hydrothermal activity,» he says.

In an email interview with Newsweek, lead author Gaël Choblet, from the French National Center for Scientific Research, said that while he can not speculate on the presence of alien life on Enceladus, their timescale for hydrothermal activity does bolster the case that microbial life could emerge.

If there is hydrothermal activity on Enceladus, Cassini could detect H2 in its geysers, says Glein.

Cassini, which began its journey over two decades ago, facilitated the publication of more than 3,000 scientific papers with the data it collected and is responsible for several major discoveries, including liquid methane seas on Titan and evidence of hydrothermal activity on Enceladus.

Ongoing hydrothermal activities within Enceladus.

Hydrothermal activity generates sulfate - rich hydrated mineral deposits along volcanoes, similar to the soil surrounding Hawaiian volcanoes.

The most likely of these theories are hydrothermal activity and acid fog.

They range from hydrothermal activity, acid fog from extinct volcanos, and even efflorescence, which is how salt deposits form in basements or on brick walls.

Among the probe's major discoveries were Titan's liquid methane seas and a global ocean on Saturn's moon Enceladus that showed evidence of hydrothermal activity.

The team describes newly discovered geological and biological manifestations of hydrothermal activity at two sites on young abyssal hills flanking the East Pacific Rise, a fast - spreading portion of the global mid-ocean ridge system.

It is also the main component of naturally occurring hydrocarbon gas reservoirs, and a contribution is also provided by volcanic and hydrothermal activity.

This cutaway view of Saturn's moon Enceladus is an artist's rendering that depicts possible hydrothermal activity that may be taking place on and under the seafloor of the moon's subsurface ocean, based on recently published results from NASA's Cassini mission.

On Earth, the most common way to form silica grains of this size is hydrothermal activity under a specific range of conditions; namely, when slightly alkaline and salty water that is super-saturated with silica undergoes a big drop in temperature.

Somewhere inside the icy body, there was hydrothermal activity — salty warm water interacting with rocks.

As NASA explains on its website, among other discoveries, Cassini revealed the icy jets that shoot from Saturn's minuscule moon Enceladus, which showed evidence of an underground ocean with hydrothermal activity within it.

Additional unprocessed images gathered during Cassini's plunge are available online, along with hundreds of thousands collected by the probe during the more than 13 years it has spend studying Saturn and its moons — observations which resulted in the publication of more than 3,000 studies and such discoveries as liquid methane seas at Titan and hydrothermal activity on Enceladus.

[See Hsiang - Wen Hsu et al., «Ongoing Hydrothermal Activities within Enceladus,» Nature, Vol.

Natural disaster means earthquake, natural landslip, volcanic eruption, hydrothermal activity, tsunami or fire resulting from any of these.

Not exact matches

But some researchers have challenged that theory, noting that chemical activity around hydrothermal vents could produce similar structures.

Cooperation with AVA Biochem is part of comprehensive KIT activities for manufacture of chemical energy carriers as well as intermediates from biomass with emphasis on so - called hydrothermal methods i.e. reactions in water at increased temperatures.

In fact, Lost City is unlike any other hydrothermal system because it appears to be unconnected to volcanic activity.

The hydrothermal conditions of the experiments, which also mimic early Earth settings (a proximity to volcanic activity and impact craters), released a complex mixture of oxygen - rich compounds, the probable result of oxidative processes that occurred in the parent body.

In this study, we demonstrate how atomically dispersed ionic platinum (Pt2 +) on ceria (CeO2), which is already thermally stable, can be activated via steam treatment (at 750 °C) to simultaneously achieve the goals of low - temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability.