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We have 10 guests online| Dams + mining= more earthquake? |
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| General Info - Mining Impacts |
| Friday, 23 April 2010 19:17 |
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I have mentioned in this space to studies relating an increase in the frequency of earthquakes with the construction of large dams and mining exploitation and oil on a large scale. He pointed out that the subject has been studied since the 60's and at present, about 100 dams have been accused of causing earthquakes.
17/03/2010. Here in the country, some still think that this is science fiction. However, recent studies tend to confirm that this is a real problem. Late last year, for example, a team of scientists led by Shemin Ge, University of Colorado (United States), published an article in the Geophysical Research Letters journal (vol. 36) that warns: "Potentially Zipingpu dam could advance the Sichuan earthquake (China) at tens or perhaps hundreds of years". Sichuan earthquake occurred in May of 2008, caused 88,000 deaths with an intensity of 7.9 on the Richter scale. After the tragedy, the chief engineer of the Geology and Sichuan Mineralogy Department suggested that the quake was "an additional example, the most spectacular ever seen and the dam induced seismicity." Until then it turned out that some dams could induce earthquakes up to 5.3. The Zipingpu dam is 156 meters high, was commissioned in 2004 and is located about one kilometre of a fault system. Another American geologist had associated this earthquake with human activities (Science, February 2009).
All this, to insist on the need for further studies related to the induced seismicity in Hidrosogamoso which is near the Bucaramanga seismic nest, an area with mining exploitation and oil activities. As it was said, they have also been associated with earthquakes. In the case of a reservoir in Bucaramanga it will get near Bucaramanga faults and Surat. On top of that, both of them are developing an insane open-pit mining project that in addition to seismic risk represents the main threat to drinking water supply of the metropolitan area of Bucaramanga. Once the studies are completed and the results say that there is no problem, it should be fine. But what we can not do is to build works and then sits down to see what happens. 18th March 2010 By Jairo Puente Brugés published in Vanguardia
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