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Latest Structure of the Earth Stories

06139b4b14e89083087070bdea735a24
2009-09-05 14:09:27

Scientists return from first ever riser drilling operations in seismogenic zone The Deep-sea Drilling Vessel CHIKYU successfully completed riser drilling operations on Aug. 31, for IODP Expedition 319, Stage 2 of the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE). The CHIKYU is operated by the Japan Agency for Marine-Earth Science and Technology (JAMSTEC) in partnership with the Integrated Ocean Drilling Program. The expedition began with drilling operations at the Kumano Basin, off...

0af0e9605ef53b6e1e491e1c706498ef1
2009-08-19 15:20:00

Process may be linked with presence of waterAs tags on household appliances warn, water conducts electricity extremely well. Now, scientists have found that enhanced electrical conductivity in parts of Earth's mantle may signal the presence of water far below our planet's surface.The researchers created the first global three-dimensional map of electrical conductivity in the mantle. Results of their study are published this week in the journal Nature.The areas of high conductivity coincide...

e2327b47921cc6e34822f8988f2ac4a9
2009-08-04 11:30:00

The Integrated Ocean Drilling Program (IODP), in collaboration with industry partner AGR Drilling Services, has engineered an ultra-deepwater drilling technology for use by IODP drilling vessels in scientific research. Originally developed for shallow-water oil and gas exploration, the "riserless mud recovery" technology (RMRâ“ž¢) holds great promise for scientists striving to reach the long-held goal of Project Mohole in the 1950s: drilling all the way through...

778ddef0b48a8e736ff9e87a5e2f67871
2009-07-30 10:50:00

Kumano Basin off Kii Peninsula, approximately 58 km southeast of Japan"” Despite harsh atmospheric and ocean conditions, and complex geological characteristics of its drill site, the deep-sea drilling vessel CHIKYU, for the first time in the history of scientific ocean drilling, conducted riser-drilling operations to successfully drill down to a depth of 1,603.7 meters beneath the sea floor (at water depth of 2,054 meters). Engaged in IODP Expedition 319, the CHIKYU is drilling deep...

2009-07-30 10:25:11

Researchers aboard drilling vessel Chikyu report successful completion of first riser-drilling operations in earthquake zone.Kumano Basin off Kii Peninsula, approximately 58 km southeast of Japan"” Despite harsh weather and ocean conditions, and complex geological characteristics of its drill site, the deep-sea drilling vessel CHIKYU, for the first time in the history of scientific ocean drilling, conducted riser-drilling operations to drill successfully down to a depth of 1,603.7...

2009-06-22 11:50:00

The Earth's mantle, situated under the Earth's crust, is very much the spot for studying interesting geological processes. Although we do not realise it, right under our feet there is a sultry world of circulating Earth layers. We only come into contact with these hot Earth layers in the event of earthquakes and volcanic eruptions. It is therefore important to learn more about the characteristics of the Earth's mantle. These characteristics can be portrayed using seismic waves. However, the...

2009-06-18 09:10:49

U.S. scientists have used a supercomputer to calculate the iron isotope distribution in Earth's mantle that occurred 4.5 billion years ago. University of California-Davis geochemists said they simulated the conditions that would have existed when the Earth crystallized from an ocean of magma to its solid form, producing the first picture of how different isotopes of iron were initially distributed in the solid Earth. The scientists said their research could result in a wave of investigations...

2009-06-18 08:29:58

For the first time scientists have discovered the presence of a natural deep earth pump that is a crucial element in the formation of ore deposits and earthquakes.The process, called creep cavitation, involves fluid being pumped through pores in deformed rock in mid-crustal sheer zones, which are approximately 15 km below the Earth's surface.The fluid transfer through the middle crust also plays a key role in tectonic plate movement and mantle degassing.The discovery was made by examining one...

2ec90e91bdd6b5e7b9ab18d3ea5ecfbc1
2009-06-15 14:40:00

UC Davis team calculates distribution of iron isotopes in Earth's mantle 4.5 billion years ago, opening door to new studies of planet's geologic historyBy using a super-computer to virtually squeeze and heat iron-bearing minerals under conditions that would have existed when the Earth crystallized from an ocean of magma to its solid form 4.5 billion years ago, two UC Davis geochemists have produced the first picture of how different isotopes of iron were initially distributed in the solid...

2009-05-28 11:07:43

 A new analysis of the processes that constantly stir the Earth's deep mantle is helping to explain how the mantle holds onto a portion of ancient noble gases that were trapped during the Earth's formation.The research, which appears this week in the journal Nature, takes aim at a question that has vexed geoscientists for years: how to reconcile leading theories about the convection of Earth's mantle with observations of ancient noble gases in volcanic rocks. Researchers at Rice...


Latest Structure of the Earth Reference Libraries

Seismology
2014-01-12 00:00:00

Seismology is the scientific study of earthquakes and the spread of elastic waves through the Earth or through other planet-like bodies. The field includes studies of earthquake effects, such as tsunamis in addition to diverse seismic sources such as tectonic, volcanic, oceanic, atmospheric, and artificial processes. A related field that utilizes geology to infer information regarding past earthquakes is paleoseismology. A recording of earth motion as a function of time is a seismogram. A...

0_a4a5653b4a287158357a3d5b37b58d01
2014-01-12 00:00:00

Earth science (or geoscience) is the science of the planet Earth. Earth science can be broken down into four major disciplines, which are: geography, geology, geophysics, and geodesy. These disciplines use physics, chemistry, biology, chronology and mathematics to arrive to a greater understanding of the principal areas of the Earth system. Since Earth is the only known life-bearing planet, Earth science is solely dedicated to the geophysical makeup of our own planet. One discipline,...

6_914a7fcc557496313161b2da1b718dea2
2004-10-19 04:45:41

Meteorite -- A meteorite is a relatively small extraterrestrial material body that reaches the Earth's surface. While in space these bodies are called meteoroids. Upon entering the atmosphere air drag and friction will cause the body to heat up, emitting light, thus forming a meteor, fireball, or shooting star. Most meteors disintegrate in the air, making impact events (Earth impacts) on the surface of Earth uncommon. About 500 baseball sized rocks a year reach the surface. Large...

4_33609f8ebef994f54be143abe0bef9f42
2004-10-19 04:45:40

Earth -- in geology and astronomy, fifth largest planet of the solar system and the only planet definitely known to support life. Gravitational forces have molded the earth, like all celestial bodies, into a spherical shape. However, the earth is not an exact sphere, being slightly flattened at the poles and bulging at the equator. The equatorial diameter is c.7,926 mi (12,760 km) and the polar diameter 7,900 mi (12,720 km); the circumference at the equator is c.24,830 mi (40,000 km)....

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