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Seismolgists get handle on heat flow deep in Earth
11-23-2006 · EurekAlert!Earth's interior is not a benign world that only stores the geologic history of our planet. Geologists now see the inner Earth as a dynamic environment filled with exotic materials and substances roiling under intense heat and pressures. The latest evidence of this dynamic inner Earth is revealed in a recent series of measurements that peered deep within Earth, halfway to its center.
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Keywords: seismolgists, handle, heat, flow, deep, earth, seismolgist
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- Research reveals limitations of seismic data for mapping rock units in young oceanic crust
01-29-2007 · EurekAlert!
Researchers report in Nature that an approach used for years to understand the structure of Earth's oceanic crust is flawed and geoscientists will have to reconsider the correspondence between seismic data and rock units when mapping formations of young oceanic crust. The new finding alters the view of how new crust is formed at mid-ocean ridges, how heat and chemicals flow through oceanic crust and how life can exist in deep below the seafloor.
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- Seismologists measure heat flow from Earth's molten core into the lower mantle
11-23-2006 · EurekAlert!
For the first time, scientists have directly measured the amount of heat flowing from the molten metal of Earth's core into a region at the base of the mantle, a process that helps drive both the movement of tectonic plates at the surface and the geodynamo in the core that generates Earth's magnetic field.
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- New deep space images of distant strip of sky to be available on Google
10-03-2007 · EurekAlert!
A global project to map a distant strip of the universe is releasing itsdata today to scientists and the public to be used as part of GoogleSky, a new feature of Google Earth. The international team is taking deep images of an area of sky known asthe Extended Groth Strip, an area that covers the width of four fullmoons, close to the end of the Big Dipper's handle.
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- Helium isotopes point to new sources of geothermal energy
11-29-2007 · EurekAlert!
By measuring helium isotope ratios in fluids at the surface, geochemists Mack Kennedy of the Department of Energy's Lawrence Berkeley National Laboratory and Matthijs van Soest of Arizona State University have discovered a new tool for identifying potential geothermal energy resources. The potential resources arise not from volcanism but from the flow of surface fluids through deep fractures that penetrate the earth's lower crust, in regions far from current or recent volcanic activity.
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- Why a Rocky Mountain high?
06-24-2007 · EurekAlert!
A University of Utah study shows how various regions of North America are kept afloat by heat within Earth's rocky crust, and how much of the continent would sink beneath sea level if not for heat that makes rock buoyant. Of coastal cities, New York City would sit 1,427 feet under the Atlantic, Boston would be 1,823 feet deep, Miami would reside 2,410 feet undersea and Los Angeles would rest 3,756 feet beneath the Pacific.
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- Energy from hot rocks
11-07-2007 · EurekAlert!
Two UC-Davis geologists are taking part in the Iceland Deep Drilling Project, an international effort to learn more about the potential of geothermal energy, or extracting heat from rocks.
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- Tectonic plates act like variable thermostat
08-13-2007 · EurekAlert!
PNAS study finds that heat loss from Earth's mantle is highly variable and depends on tectonic plate arrangement. Earth currently at relatively low level of heat loss.
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- July GEOLOGY and GSA TODAY media highlights
06-29-2007 · EurekAlert!
Topics include: new insights into dynamics of seafloor spreading; erosion of Alaska's Arctic coast; a challenge to hypothesized glaciation in the mid-Cretaceous; evidence of vegetation causing erosion rather than preventing it; a case for a Hadeon ocean; and dating of Earth's earliest and largest global carbon cycle imbalance. The GSA TODAY science article addresses deep-time mountain building in Tibet.
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- Scientists launch deep-sea scientific drilling program to study volatile earthquake zone
09-20-2007 · EurekAlert!
Scientists begin exploring the origins of earthquakes at their source with the launch of the Nankai Trough Seismogenic Zone Experiment. On Sept. 21, the Japanese drilling vessel Chikyu departs from Shingu Port with scientists aboard, ready to log, drill, sample and install monitoring instrumentation in one of the most active earthquake zones on Earth. Situated off Japan's southwest coast, the Nankai Trough has generated large-scale earthquakes and tsunamis for millions of years.
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- Moving to the rhythm of the Sun
08-17-2007 · European Space Agency (ESA)
Scientists from the Ulysses mission have proven that sounds generated deep inside the Sun cause the Earth to shake and vibrate in sympathy. They have found that Earth's magnetic field, atmosphere and terrestrial systems, all take part in this cosmic sing-along.
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