Methods for volcanic dating
Following the discovery of radioactivity by Becquerel (1896), the possibility of using this phenomenon as a means for determining the age of uranium-bearing minerals was demonstrated by Rutherford (1906).One year later Boltwood (1907) developed the chemical U-Pb method. By combining Von Weizsackers argon abundance arguments with Kohlhorsters observation that potassium emitted gamma-radiation, Bramley (1937) presented strong evidence that potassium underwent dual decay.Here is an easy-to understand analogy for your students: relative age dating is like saying that your grandfather is older than you.Absolute age dating is like saying you are 15 years old and your grandfather is 77 years old.Thus, while great volume of new magma was received by the Santorini chamber in 2012, so that it came close to rupture (and possible eruption), the chamber did not quite reach the rupture stage.The new model has the potential to forecast when magma chambers in other volcanoes could rupture and potentially lead to eruptions, which should aid emergency planning and risk assessments.*Prices in US$ apply to orders placed in the Americas only.Prices in GBP apply to orders placed in Great Britain only.
We believe our new model can be used to forecast the timing of magma-chamber rupture at Santorini and, eventually, at well-monitored volcanoes worldwide.was published, the earth was "scientifically" determined to be 100 million years old. In 1947, science firmly established that the earth was 3.4 billion years old.Finally in 1976, it was discovered that the earth is "really" 4.6 billion years old What happened?Researchers from the Department of Earth Sciences at Royal Holloway, University of London, have developed a new method which could more accurately determine the conditions needed for a volcano to erupt.
The study will be published on 28 October in The team, composed of Ph D students John Browning and Sandy Drymoni and Professor Agust Gudmundsson, used newly collected geological data and historical data on previous eruptions of the Santorini volcano in Greece, to work out the capacity of the volcano's magma-chamber.They were then able to build a model which allowed them to estimate the pressure increase in the magma-chamber when it's being refilled and therefore forecast when it's likely to rupture and potentially cause an eruption.