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+--- Thread: Diamond’s 2-billion-year growth charts tectonic shift + Mixed bag news (/thread-3416.html)
Diamond’s 2-billion-year growth charts tectonic shift + Mixed bag news - C C - Feb 26, 2017
Diamond’s 2-billion-year growth charts tectonic shift in early Earth’s carbon cycle
https://www.sciencedaily.com/releases/2017/02/170223102126.htm
SUMMARY: A study of tiny mineral 'inclusions' within diamonds from Botswana has shown that diamond crystals can take billions of years to grow. One diamond was found to contain silicate material that formed 2.3 billion years ago in its interior and a 250 million-year-old garnet crystal towards its outer rim, the largest age range ever detected in a single specimen. Analysis of the inclusions also suggests that the way that carbon is exchanged and deposited between the atmosphere, biosphere, oceans and geosphere may have changed significantly over the past 2.5 billion years....
From rocks in Colorado, evidence of a 'chaotic solar system'
https://www.sciencedaily.com/releases/2017/02/170222131512.htm
SUMMARY: Plumbing a 90 million-year-old layer cake of sedimentary rock in Colorado, a team of scientists has found evidence confirming a critical theory of how the planets in our solar system behave in their orbits around the sun. The finding is important because it provides the first hard proof for what scientists call the ''chaotic solar system....'
'Quartz' crystals at Earth's core power its magnetic field
https://www.sciencedaily.com/releases/2017/02/170222131505.htm
SUMMARY: Scientists are reporting unexpected discoveries about Earth's core. The findings include insights into the source of energy driving Earth's magnetic field, factors governing the cooling of the core and its chemical composition, and conditions that existed during the formation of Earth....
Insight into a physical phenomenon that leads to earthquakes
https://www.sciencedaily.com/releases/2017/02/170222113802.htm
SUMMARY: Researchers provide insight into a phenomenon called ageing that leads to more powerful earthquakes....
Experiments call origin of Earth's iron into question
https://www.sciencedaily.com/releases/2017/02/170221110719.htm
SUMMARY: New research reveals that the Earth's unique iron composition isn't linked to the formation of the planet's core, calling into question a prevailing theory about the events that shaped our planet during its earliest years....