1. Главная
  2. Ресурсы
  3. Библиотечный поиск
Restoration ofCenozoic deformationin Asia and the sizeof Greater India Douwe J.J. van HinsbergenPaul KappGuillaume Dupont‐Nivet2011 год

Restoration of Cenozoic deformation in Asia and the size of Greater India
статья из журнала

Полный текстСтраница публикацииПубликация в OpenAlex
Аннотация: A long‐standing problem in the geological evolution of the India‐Asia collision zone is how and where convergence between India and Asia was accommodated since collision. Proposed collision ages vary from 65 to 35 Ma, although most data sets are consistent with collision being underway by 50 Ma. Plate reconstructions show that since 50 Ma ∼2400–3200 km (west to east) of India‐Asia convergence occurred, much more than the 450–900 km of documented Himalayan shortening. Current models therefore suggest that most post‐50 Ma convergence was accommodated north of the Indus‐Yarlung suture zone. We review kinematic data and construct an updated restoration of Cenozoic Asian deformation to test this assumption. We show that geologic studies have documented 600–750 km of N‐S Cenozoic shortening across, and north of, the Tibetan Plateau. The Pamir‐Hindu Kush region accommodated ∼1050 km of N‐S convergence. Geological evidence from Tibet is inconsistent with models that propose 750–1250 km of eastward extrusion of Indochina. Approximately 250 km of Indochinese extrusion from 30 to 20 Ma of Indochina suggested by SE Asia reconstructions can be reconciled by dextral transpression in eastern Tibet. We use our reconstruction to calculate the required size of Greater India as a function of collision age. Even with a 35 Ma collision age, the size of Greater India is 2–3 times larger than Himalayan shortening. For a 50 Ma collision, the size of Greater India from west to east is ∼1350–2600 km, consistent with robust paleomagnetic data from upper Cretaceous‐Paleocene Tethyan Himalayan strata. These estimates for the size of Greater India far exceed documented shortening in the Himalaya. We conclude that most of Greater India was consumed by subduction or underthrusting, without leaving a geological record that has been recognized at the surface.
Год издания: 2011
Авторы: Douwe J.J. van Hinsbergen, Paul Kapp, Guillaume Dupont‐Nivet, Peter C. Lippert, Peter G. DeCelles, Trond H. Torsvik
Издательство: Wiley
Источник: Tectonics
Ключевые слова: Geological and Geochemical Analysis, earthquake and tectonic studies, High-pressure geophysics and materials
Другие ссылки: Tectonics (PDF)
Tectonics (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
insu.hal.science (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
HAL (Le Centre pour la Communication Scientifique Directe) (PDF)
HAL (Le Centre pour la Communication Scientifique Directe) (HTML)
Data Archiving and Networked Services (DANS) (PDF)
Data Archiving and Networked Services (DANS) (HTML)
CiteSeer X (The Pennsylvania State University) (PDF)
CiteSeer X (The Pennsylvania State University) (HTML)