MSU geologists and their colleagues from South Africa and Novosibirsk studied the interaction between the oldest blocks of the Earth's continental crust. Detailed analysis of graphite and microscopic gas inclusions in quartz confirmed that it involved CO2-rich fluids. Understanding the formation processes of these rocks scientists could predict the mechanisms of mineral ore deposit generation near them and in the areas formed under similar conditions. The study was published in the Gondwana Research journal.
Fiber-optic cables can be used to detect earthquakes and other ground movements. The data cables can also pick up seismic signals from hammer shots, passing cars or wave movements in the ocean. This is the result of a study appearing in the journal Nature Communications on July 3, 2018. Main authors are Philippe Jousset and Thomas Reinsch from GFZ German Research Centre for Geosciences. They carried out the investigation together with colleagues from Island, UK, Berlin, Germany, and Potsdam, Germany.
Nanoscale knowledge of the relationships between water, friction and mineral chemistry could lead to a better understanding of earthquake dynamics, researchers said in a new study. Engineers at the University of Illinois at Urbana-Champaign used microscopic friction measurements to confirm that, under the right conditions, some rocks can dissolve and may cause faults to slip.
A team of scientists including Carnegie's Michael Ackerson and Bjorn Mysen revealed that granites from Yosemite National Park contain minerals that crystalized at much lower temperatures than previously thought possible. This finding upends scientific understanding of how granites form and what they can teach us about our planet's geologic history.
A UW-Madison study is tracing the geologic changes in the Maule volcanoes, located in a region in Chile that has seen enormous eruptions during the last million years.
Utah State University geologist Susanne Jänecke and colleagues identify the San Andreas Fault's 'Durmid Ladder' structure, a a nearly 15.5-mile-long, sheared zone with two, nearly parallel master faults and hundreds of smaller, rung-like cross faults that could be the site of the region's next major earthquake.
he Himalayan Range includes some of the youngest and most spectacular mountains on Earth, but the rugged landscape that lends it the striking beauty for which it is known can also keep scientists from fully understanding how these mountains formed. 'We know more about the rocks on parts of Mars than we do about some of the areas in the Himalaya,' said Dr. Alka Tripathy-Lang.
In the seabed, there are numerous microorganisms that play an important role in the global carbon cycle. Based on samples from an underwater mud volcano in the Nankai trough beside Japan researchers found that the microorganisms in the sediment are extremely active and form about 90 percent of the methane released from that depth. Apparently, the role of mud volcanoes in the global methane cycle has been significantly underestimated.
At four centers in California, New Zealand, Europe and Japan -- and in countless labs across the globe -- CSEP's experiments and its rigorous testing procedures have shed light on the predictability of earthquakes, according to a special focus section published June 13 in Seismological Research Letters.
Scientists are using the latest in 4D technology to predict the behavior of lava flows and its implications for volcanic eruptions. The results explain why some lava flows can cover kilometers in just a few hours, whilst others travel more slowly during an eruption, highlighting the hazard posed by fast-moving flows which often pose the most danger to civilian populations close to volcanoes.