Федеральное государственное бюджетное учреждение науки
Геологический институт им. Н.Л. Добрецова
Сибирского Отделения Российской академии наук
(ГИН СО РАН)
Мир Бурятия "Гравитация науки: Геологический институт БНЦ СО РАН"
Дайджест мировых новостей:
Deep Quakes, in Pakistan and Elsewhere [2011-01-19] Yesterday a magnitude-7.2 earthquake struck a part of Pakistan so remote that it's where the country did nuclear bomb testing #8212;Pakistan's Nevada. Moreover, the quake was 80 kilometers deep, which means that even if you were right on top of it, at its epicenter, it would still be 80 km away. So rather than dwell on its damages and injuries, I want to point to the quake as an example of a special category: deep-focus earthquakes.
In general, rocks deeper than about 50 km aren't supposed to be brittle enough to support quake-producing high stresses. But there are ways to get around that. The simplest is to pull cold lithosphere down deep, where it can fracture before it fully warms up. That seems to be the case for this event: the ongoing collision of India with Eurasia has pushed the lithosphere into a thick pile, and the rock at 80 km depth is still brittle.
The same explanation accounts for many deep subduction-related quakes west of Mexico and South America, near Japan and Taiwan, and so forth #8212;but not the deepest events. Read more about those more exotic mechanisms in my article 'Deep Earthquakes.'
Since I mentioned nuclear testing, let me forestall that other pesky question that keeps arising, 'do bombs cause earthquakes?' (Quick answer, No.) z.about.coml
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Основные научные направления
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Эволюция тектонических структур, магматизма и рудообразования в различных геодинамических обстановках складчатых поясов;
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Геоэкология Байкальского региона
Диссертационный совет Д 003.002.01.
К защите принимаются диссертации на соискание ученой степени кандидата и доктора наук по специальностям: 25.00.04 - петрология, вулканология; 25.00.11 - геология, поиски и разведка твердых полезных ископаемых, минерагения
Действует аспирантура по направлению наук 05.06.01 Науки о Земле по следующим специальностям:
