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Latest Olivine Stories

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2011-05-26 11:00:00

Tiny crystals of a green mineral called olivine are falling down like rain on a burgeoning star, according to observations from NASA's Spitzer Space Telescope. This is the first time such crystals have been observed in the dusty clouds of gas that collapse around forming stars. Astronomers are still debating how the crystals got there, but the most likely culprits are jets of gas blasting away from the embryonic star. "You need temperatures as hot as lava to make these crystals," said Tom...

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2010-09-03 14:03:42

Earth today is one of the most active planets in the Solar System, and was probably even more so during the early stages of its life. Thanks to the plate tectonics that continue to shape our planet's surface, remnants of crust from Earth's formative years are rare, but not impossible to find. A paper published in Nature Sept. 2 examines how some ancient rocks have resisted being recycled into Earth's convecting interior. Throughout the world there exist regions of ancient crust, referred to...

2010-09-01 13:56:00

HOUSTON, Sept. 1 /PRNewswire-USNewswire/ -- Why do we still find rocks from the Archean, one of the earliest geological eons on Earth dating from about 3.8 to 2.5 billion years ago? This is an apt question as our planet is one of the most dynamic in the solar system. Earth's crust has been constantly destroyed and created throughout its 4.5-billion-year history. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) (Logo: http://www.newscom.com/cgi-bin/prnh/20081007/38461LOGO)...

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2010-07-06 06:05:00

The Moon's geological past could be better understood by a mineral that Japanese astronomers report they have found. Using an instrument-loaded probe - Kaguya - placed in orbit around the lunar body in 2007, the team of scientists found abundant sources of the mineral in concentric rings in three distinct crater regions. Olivine, as the mineral is known, is believed to be a revealing sign of mantle -- the deep inner layer of iron- and magnesium-rich rock that lies beneath the Moon's crust....

2005-07-06 17:05:35

Mars is a rocky planet with an ancient volcanic past, but new findings show the planet is more complex and active than previously believed "“ at least in certain places. Finding those places, however, turns out to be trickier than just looking at landforms like river valleys or lakebeds or searching for specific minerals. "Context is everything," said Philip Christensen, Principal Investigator for the Thermal Emission Spectrometer (TES) on Mars Global Surveyor and for the Thermal...

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2005-07-01 07:00:00

NASA and University of Arizona researchers have discovered pristine mineral grains that formed in an ancient supernova explosion. The grains were among other extraterrestrial dust plucked by high-flying NASA research aircraft from Earth's upper atmosphere after they were delivered to Earth by a comet or primitive asteroid. It is the first time anyone has ever discovered silicate grains, in this case olivine, from a supernova. They reveal important new information on how much material...

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2005-06-03 17:50:32

HONOLULU, Hawaii -- By using new, high spatial resolution infrared data from NASA's Mars Odyssey spacecraft, Victoria Hamilton from the University of Hawaii at Manoa and Philip Christensen from Arizona State University have concluded that a region on the surface of Mars known to contain olivine-rich rocks is actually 4 times larger than previously estimated. The bedrock in question is adjacent to Syrtis Major, one of Mars' largest volcanoes. This region is of interest to scientists...