Sedimentary processes and origin of sediment gravity-flow deposits on the western Algerian margin during late Pleistocene and Holocene |
| |
| Authors: | Pierre Giresse Henri Pauc Jacques Déverchère |
| |
| Institution: | 1. IMAGES EA4218, Laboratoire d''Études des Géo-Environnements Marins, Université de Perpignan, 52 Avenue Paul Alduy, 66860 Perpignan Cedex, France;2. Université Européenne de Bretagne, France;3. Université de Brest; CNRS, UMR 6538 Domaines Océaniques, Institut Universitaire Européen de la Mer, Place Copernic, 29280 Plouzané, France;1. Department of Physical Geography and Resources Sciences, School of Urban and Environmental Sciences, Northwest University, Xi''an, 710127, China;2. Department of Environmental Sciences and Technology, Xi''an Jiaotong University, Xi''an, 710049, China;3. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210093, China;1. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;2. China Institute of Water Resources and Hydropower Research, Beijing 100038; Research Center on Flood and Drought Disaster Reduction of the Ministry of Water Resources, Beijing 100038, China;3. CSIRO Digital Productivity, Leeuwin Centre, 65 Brockway Road, Floreat Park, WA 6014, Australia;4. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China, Institute of Water Resources and Hydropower Research, Beijing 100038, China;1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500, China;2. CAS Key Laboratory of Ocean and Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China;3. Southwest Petroleum University, Division of Key Laboratory of Carbonate Reservoirs, CNPC, Chengdu, 610500, China;4. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla, 841000, China;5. Radiogenic Isotope Facility, School of Earth & Environmental Sciences, The University of Queensland, Queensland, 4072, Australia;1. Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China;2. College of Hydrometeorology, Nanjing University of Information Science and Technology, Nanjing 210044, China;3. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China;4. College of Geographic Sciences, Fujian Normal University, Fuzhou, Fujian 350007, China;5. Huai River Water Resources Commission, Ministry of Water Resources, Bengbu, Anhui 233001, China;6. College of Land and Resources, China West Normal University, Nanchong, Sichuan 637002, China;7. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, Jiangsu 210093, China |
| |
| Abstract: | Seven piston cores retrieved from the Algerian margin from Oran to 80 km east of Algiers were studied to identify sediment gravity-flow deposits and their sources. At the foot of the slope, five sediment cores indicate a decreasing frequency of turbidite sequences from the transgressive systems tract to the highstand systems tract resulting in lower off-shelf sediment fluxes during the last highstand episode. There is an approximately log-normal frequency distribution of bed thickness that increases for larger grain-size class, but this relationship is frequently altered by truncation of the top of the turbidite sequence. In the deep basin off Algeria, two sediment cores indicate that turbidite sequences are both thicker and more preserved than at the foot of the slope and are observed through the entire sediment core implying various origin of the gravity flow (eustatic change, seismicity). |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
