 |
 |
Dear Juan, Much work has been done on the creep of sedimentary basins, but it's been focussed n the rheology of the weakest layers (especially overpressured mud and evaporite). The sedimentary fill is commonly highly heterogenous, and the majority of the heterogeneity is in the vertical direction (i.e. stratigraphy). The bulk of the movement occurs by creep along the weakest layers. So, if you look in to the literature for the experimental parameters for evaporites (esp. halite and anhydrite) and overpressured mudrock, I suspect that you'll find most of the answer you need. In the case of strongly overpressured mud, it can be more like running than creeping. Seismic imaging data of continental margin basins indicate that if neither type of decollement is present, the basin doesn't significantly deform under gravity at all. Cheers Frank -----Original Message----- From: Juan I. Soto [mailto:[log in to unmask]] Sent: Tuesday, June 17, 2003 2:32 AM To: [log in to unmask] Subject: Creep parameters for sedimentary rocks Dear all, I'm intending to find any estimate on the experimentally-derived, steady-state creep parameters for fine-grained sediments, like shale, mud, or clay-rich sedimentary rocks. Most of the published creep parameters correspond with "hard" rocks, and make possible to model the ductile yield strength of the continental crust; but what about the ductile rheology envelope in the deep levels of thick sedimentary basins? Waiting your responses. All the best, Juan I. Soto __________________________________________________________________________ Dr. J.I. Soto Instituto Andaluz de Ciencias de la Tierra & Departamento de Geodinamica CSIC - Universidad de Granada Web-page: http://www.ugr.es/~jsoto Campus Fuentenueva e-mail: [log in to unmask] 18071- Granada Phone: 34-958 249506 SPAIN Fax: 34-958 248527 and 34-958 243384 EOM NOTICE - This message and any attached files may contain information that is confidential and/or subject of legal privilege intended only for use by the intended recipient. If you are not the intended recipient or the person responsible for delivering the message to the intended recipient, be advised that you have received this message in error and that any dissemination, copying or use of this message or attachment is strictly forbidden, as is the disclosure of the information therein. If you have received this message in error please notify the sender immediately and delete the message.