|
ИСТИНА |
Войти в систему Регистрация |
ИПМех РАН |
||
Late Cenozoic burial history and dynamics of the Northern Caucasus molasse basin: Implications for foreland basin modellingстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Ershov A.V.a.b, Brunet M.F b, Korotaev M.V.a, Nikishin A.M.a, N Bolotov S.a.
- Журнал: Tectonophysics
- Том: 313
- Номер: 1-2
- Год издания: 1999
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 219
- Последняя страница: 241
- DOI: 10.1016/S0040-1951(99)00197-3
- Аннотация: The collisional history of the Caucasus segment of the Alpine-Himalayan fold belt started at the end of the Eocene. The associated development of the Northern Caucasus foreland basin occurred during two syn-collisional stages, each displaying different subsidence patterns. The 34-16 Ma (Maikopian or pre-foreland stage) displays a long-wavelength subsidence of a broad area whereas the 16-0 Ma (foreland stage) displays asymmetrical foreland subsidence. The first is correlated with the termination of subduction in the southern area and can be associated with mantle flow induced by the re-equilibration of the subducted slab. The along-strike configuration of the second, molasse basin, stage contradicts the hypothesis in which topographical loading is considered to be the main control on foreland subsidence. There is a clear anti-correlation between basin depths and orogen heights: the deepest parts of the basin are at the tips of the orogen, where mountain heights are negligible while the area adjacent to the highest mountains (Central Caucasus) is uplifted. The influence of other types of loading in foreland basin development has therefore been investigated and it has been possible to find a good fit with both gravity and basin architecture by including only two additional model parameters into the model. These are crustal and lithospheric thickening/thinning. The results demonstrate that crustal thickening and removal of lithospheric roots are responsible for supporting the high Central Caucasus Mountains and uplift of adjacent areas. The subsidence of the basins at the orogen tips is explained by loading of lithospheric roots. Both effects are important in the geographically intermediate areas. In general, it is concluded that topography should not be considered as the main control on foreland subsidence, but only as one of several counterbalancing mechanisms. The existing flexural model therefore needs improvements such that it can be related directly to ’subsurface loading’ by real structures and processes during collision.
- Добавил в систему: Никишин Анатолий Михайлович