Made about the dangers of expanding the boundaries of the Gulf of failure, and today we continue this theme. But if you look into the territory Kabansky area with satellite altitude flight, you can see that this strip of land sandwiched between the mountain ranges and the Baikal basin. This strip is composed of sedimentary rocks lying on the rocky ground, steeply sloping towards the earth fault. In the event of an earthquake sods can move down the hill … But this story next story. Today's start with a legend.
Selenga River, the largest tributary of Lake Baikal, originated in Mongolia. Selenga Baikal carries a huge amount of suspended solids — sand, etc., on average, 3.6 million tons per year, with the number during the floods brought in sand can reach 7 million tonnes per month. Where it flows into Lake Baikal Selenga forms a huge delta that is many kilometers thick unconsolidated sediments, the river made the steep slope of the Baikal rift. The thickness of sediments in the Selenga Delta is estimated at 5000-5500 meters. Externally delta looks like a giant meadow swampy plain, divided into islands of numerous channels and oxbow lakes. Modern delta area about 540 square meters. km, before the construction of the Irkutsk hydroelectric delta area was two times higher. Age Selenga delta — about 500 thousand years. Delta — one of the most active areas of the Sayan-Baikal seismic zone, where earthquakes are likely to 10 points. Selenga Delta has to play the role of natural filter, primary treatment of industrial waste water into the lake on the Selenga. Though outwardly Delta, especially near the lake, it looks very picturesque, swim in Selenge, and even more use of the Selenga water for drinking and cooking, with greater care.
But not only the water should be used with caution, any economic activity in the delta and along the Rift should be done very carefully and deliberately. According to modern scientific assessments, Tsaganskoe earthquake in 1862 was 7.5, and the magnetic fluctuations reached the epicenter intensity of at least 10 points. Fallen under the waters of Lake Baikal stretch of coast with Tsaganskoy steppe was about 200 square kilometers. Earthquake swept area of almost 2 million square kilometers. Strikes, damaging the building, were observed for 600 or more kilometers from the epicenter, and the big rock falls were recorded at a distance of 400 kilometers.
In the early days of the earthquake epicenter in his killing at least three people kudarinskih. Nearly 1,300 people drowned in January ulus remained cold without shelter, household goods and livestock. Strong shocks was covered a huge area in the south of Siberia, where, and for hundreds of miles from the failure of the buildings there were serious injuries, injuries and mental health problems.
Modern scientific judgments about the causes and mechanism of the Baikal Rift not give an unambiguous answer to the convincing of vital importance to our present and future issues. Baikal giant depression — one of the mysterious places on the planet. Famous academician Vladimir Obruchev believed that the lake was formed as a result of the failure of the crust. This view is shared by many today. Baikal is slowly growing — every year it is distributed in width by 4 mm. There is a hypothesis that some day in the future he will be overseas. Maybe he's already started preparing for it?
In 1960 Irkutsk scientists and V.P.Solonenko A.A.Treskov detail considering the strongest earthquake Srednebaykalskoe 29 (30) in August 1959, was named Selenga delta most troubled section of the Sayano-Baikal seismic zone. And in an article about this earthquake have warned: "The development of the Gulf of failure, apparently, has not been completed. In this regard, the entire coastal area of Lake. Baikal, bounded on the southeast line — estuary Oymura — Small Doolan — Enkhaluk should recognize unstable. The possibility of lowering it to the level of Lake Baikal in future is not ruled by a powerful earthquake, so there should prohibit the erection of any buildings other than temporary. "
Survey work on the eastern shore of Lake Baikal were conducted from mid-twentieth century, looking for oil, which would be here in view of the structure of the crust. Found no traces of oil, but the accumulated data suggest the presence of other fossil fuels. 200-500 billion cubic meters of natural gas is located in the delta. Selenga. Scientists admit that there may be up to $ 1 trillion. cubic meters of gas, but in order to name a precise figure, you need to conduct research. Currently in the Delta up to 10 kilometers along the front reaches the surface up to 60 million cubic meters of gas a year, this amount would be enough to provide the fuel needs of Kabansky district.
As the head of the Territorial Agency for Mineral Resources in the Republic of Buryatia (Buryatnedra) Vladimir Bakhtin, "Before you begin any work in the Selenga delta, the project must undergo environmental review. Need to learn how affect the release of gas from underground reservoirs of the hydrodynamic situation of the lake. " I think it is not necessary to be an expert to understand that-be — commercial production of gas will cause a pressure drop in the loose layer of sedimentary rocks, which sooner or later will lead to land subsidence and flooding in the delta of the Selenga River and the coast of the Gulf of failure. The situation is complicated by the seismic situation. We can not allow the further development of events in which cheap "blue fuel" will be a decisive argument.
Today, the failure of Baikal in 1862 — is the story, but a story that warns, threatening at any moment to be our present, again with even more dire consequences for a much more populated and seismically vulnerable now about Baikal territory … New trouble comes when irresponsible forgotten the bitter lessons of previous … Is it so we are ready for it, if the majority not only in detail, but in general, and even a little that is known today about the tragedy of failure? As if in the dark terrible danger lurking recently developed plans for injection into the bowels r.Selengi Delta — one of the main focus of the Baikal seismic hazard — liquid waste and discussed today the possibility of extraction of fossil fuels … May still be more humane and cost-effective will not thereby provoke a formidable element of Lake Baikal on the manifestation of destructive earthquakes, with unpredictable consequences, and, remembering the last tragedy kudarinskih drill seriously attend to the problem of security, first of all, the local coastal villages!
Better safe than sorry. You should not wake a sleeping "dragon" is dangerous to pull the whiskers' blue tiger. "