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Сhapter 3 "Plate tectonics as a component of geodynamics of hierarchically subordinate geospheres" in the book “Horizons in Earth Science Research. Volume 5”книга
- Автор: Goncharov M.A.
- Год издания: 2011
- Место издания: Nova Science Publishers New York
- Объём: 44 страниц
- ISBN: 978-1-61209-923-1
- Аннотация: Plate tectonics proved to be incapable of explaining the origin of many tectonic structures of different rank, from amalgamation of continents in the Northern and Eastern Hemispheres to thinning of lithosphere under orogenic depressions in the zones of collision. The main problem of modern geodynamics is the creation of its own theoretical base, which, without ignoring and, in the necessary measure, using laws of physics, would be based at the same time on the properties of precisely geological solid medium, taking into account the completely long time of acting of processes in this medium. Geological continuous solid medium is characterized by its three fundamental properties: (1) continuity, (2) stratification to the separate geospheres or rock sequences, and (3) hierarchy of geospheres and rock sequences. The concept of geodynamics of hierarchically subordinate geospheres (shortly hierarchical geodynamics) was created taking into account these fundamental properties (see the below Table). In this concept, the elements of plate tectonics occupy their strictly defined place in the Geodynamic System of the 2nd rank (GS-2, see below). Hierarchical geodynamics sufficiently describes the entire spectrum of processes that occur in different geospheres and rock sequences and the structured units arising therein. The ideas of geodynamics of hierarchically subordinate geospheres and geodynamic cyclicity have been compared in detail. The Geodynamic System of the zeroth rank GS-0 embraces the whole Earth and is characterized by interference of permanent westward and meridional (southward and northward, alternately) continental drift in the framework of the zeroth Geodynamic Cycle (GC-0). The convective GS-1 that functions throughoutthe mantle and crust beneath the entire Earth's surface corresponds to the GC-1, or the Wilson cycle. The GS-2 that embraces the upper mantle and crust only beneath oceans corresponds to the GC-2, or the Bertrand cycle. The GS-3 functioning in the tectonosphere (asthenosphere + lithosphere) in zones of elevated heat flow (spreading, subduction, and collision zones) is brought into line with the GC-3, or Stille cycle. The GS-4 that embraces the sedimentary cover of mobile belts corresponds to the GC-4 (the phase cycle of increasing and decreasing intensity of folding and thrusting). The convective geospheres progressively grew downward in the course of geologic history. The ratio of the thickness of geospheres, where Geodynamic Systems of various ranks function, to the duration of geodynamic cycles of the respective rank falls into a narrow range of 0.45 ± 0.10 cm/yr and may be regarded as an out-of-rank geodynamic constant.
- Добавил в систему: Гончаров Михаил Адрианович
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Файл pdf | Goncharov-2011.pdf | 2,3 МБ | 20 октября 2012 [Goncharov_MA] |
| 2. | Страницы в Интернете | Internet-sites.doc | 23,5 КБ | 20 октября 2012 [Goncharov_MA] |