Geologists may have to revise their ideas about what goes on in the Earths interior, following the publication today of new research in the journal Nature. It appears that contrary to previous belief, part of the interior has remained undisturbed for at least two-and-a-half billion years, in spite of the massive forces at work inside the planet.
Like a saucepan of thick syrup being heated on the stove, huge convection currents within the Earth, generated by heat from the core, have stirred up the interior for most of its four-and-a-half billion year history. This has led geologists to believe that the interior is now well mixed. But Dr Simon Turner and Professor Chris Hawkesworth from the Earth Sciences Department at Bristol University, with colleagues at the Open University, have new data that suggest the presence of extremely ancient material beneath the Azores.
The islands of the Azores are volcanoes that sit either side of the Mid-Atlantic Ridge, a huge mountain chain beneath the ocean that formed as hot material from the Earths interior rose to the surface. In some places, such as the Azores, the tops of these mountains form islands. The lavas from the Azores volcanoes appear to have been derived from some of the oldest material yet discovered within the convecting and well stirred part of the Earth.
Cherry Lewis | alfa
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A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.
In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...
A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.
By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
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23.02.2018 | Physics and Astronomy