The Deep-Sea Fan deposits of the miocene Marnoso-Arenacea formation,northern Apennines |
| |
| Authors: | Franco Ricci Lucchi |
| |
| Institution: | 1. Instituto di Geologia, University of Bologna, Italy
|
| |
| Abstract: | Submarine fans of different sizes, geometry, and petrology were built in the Marnoso-arenacea Basin, a migrating foredeep within an active continental margin. In an initial depositional stage, a well-developed basin plain received sediment from flows that by-passed restricted fan systems, now buried, located near the north end of an elongated basin. Minor fans grew near the steeper, tectonically deformed side of the basin. In the later stage, turbidite deposition was stopped in the former basin plain. Sediment sources and feeder channels shifted and fed fan lobes that prograded in a narrower trough and were distored (choked). The tectonic control on development of megasequence and sand bodies is stressed here in contrast with previous emphasis on “inner” or “autocyclic” mechanisms. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
