A new model of mid-ocean ridge propagation: Introducing the process zone
The site of extensive volcanic activity and sea-floor spreading, the Galapagos Rise in the eastern equatorial Pacific Ocean has yielded groundbreaking research results for the field of plate tectonics. Jacqueline Floyd and her colleagues, all of Columbia Universitys Lamont-Doherty Earth Observatory, are introducing a new model for the process of mid-ocean ridge propagation (lengthening), which is responsible for seafloor spreading and the consequent formation of ocean basins. Their study is featured as this weeks cover story in the scientific journal Science.
Using recently recorded earthquake data that had not been available to previous models, the researchers show that mid-ocean ridge propagation is preceded by a complex breakdown process and earthquake activity that allows the ridge to lengthen stably in the brittle crust of the oceans lithosphere, independent of the enormous resisting forces proposed by previous models.
Mary Tobin | EurekAlert!
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A new manufacturing technique uses a process similar to newspaper printing to form smoother and more flexible metals for making ultrafast electronic devices.
The low-cost process, developed by Purdue University researchers, combines tools already used in industry for manufacturing metals on a large scale, but uses...
For the first time ever, scientists have determined the cosmic origin of highest-energy neutrinos. A research group led by IceCube scientist Elisa Resconi, spokesperson of the Collaborative Research Center SFB1258 at the Technical University of Munich (TUM), provides an important piece of evidence that the particles detected by the IceCube neutrino telescope at the South Pole originate from a galaxy four billion light-years away from Earth.
To rule out other origins with certainty, the team led by neutrino physicist Elisa Resconi from the Technical University of Munich and multi-wavelength...
For the first time a team of researchers have discovered two different phases of magnetic skyrmions in a single material. Physicists of the Technical Universities of Munich and Dresden and the University of Cologne can now better study and understand the properties of these magnetic structures, which are important for both basic research and applications.
Whirlpools are an everyday experience in a bath tub: When the water is drained a circular vortex is formed. Typically, such whirls are rather stable. Similar...
Physicists working with Roland Wester at the University of Innsbruck have investigated if and how chemical reactions can be influenced by targeted vibrational excitation of the reactants. They were able to demonstrate that excitation with a laser beam does not affect the efficiency of a chemical exchange reaction and that the excited molecular group acts only as a spectator in the reaction.
A frequently used reaction in organic chemistry is nucleophilic substitution. It plays, for example, an important role in in the synthesis of new chemical...
Optical spectroscopy allows investigating the energy structure and dynamic properties of complex quantum systems. Researchers from the University of Würzburg present two new approaches of coherent two-dimensional spectroscopy.
"Put an excitation into the system and observe how it evolves." According to physicist Professor Tobias Brixner, this is the credo of optical spectroscopy....
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