海洋地质与第四纪地质2011，Vol.31Issue(6)：157-166,10.DOI:10.3724/SP.J.1140.2011.06157
中中新世以来南沙海槽前陆盆地演化模拟
NUMERICAL SIMULATION OF FORELAND BASIN EVOLUTION IN NANSHA TROUGH SINCE MIDDLE MIOCENE
摘要
Abstract
In order to better understand the mechanism and characteristic of foreland basin evolution in the NanSha trough, we studied the structure, sedimentology and other characteristics of the basin based on the geophysical data of the past decades collected from South China Sea Institute and recent research progress both at home and abroad. An elastic lithospheric plate flexure model for Nansha Trough foreland basin is established. The finite difference method was used to simulate the basin evolution since Middle Miocene. With the model, we reconstructed the history of deposition, subsidence, tectonic movement and deflection and deformation process in the basin, and predicted the geometry, gravity anomaly, sediment thickness of the basin in different stages. The predicted gravity anomaly and basin topography fit well with the meas-ured data at 0 Ma stage. And the basin simulation shows that basin deflection caused by the sediment load is only about 2 300 m, indicating that the basin crust had been flexible before the formation of foreland basin, and the flexural deformation of the foreland basin is not only related to basin structure, topography and depositional load, but also possibly affected by lithospheric load in the deeper part.关键词
前陆盆地/形成演化/数值模拟/中中新世/南沙海槽Key words
Nansha Trough/ foreland basin/ evolution/ numerical simulation/ middle Miocene/分类
海洋科学引用本文复制引用
马辉,许鹤华,吴世敏,刘海龄..中中新世以来南沙海槽前陆盆地演化模拟[J].海洋地质与第四纪地质,2011,31(6):157-166,10.基金项目
中国科学院知识创新工程重要方向项目(KZCX2YW-Q05-04) （KZCX2YW-Q05-04）
国家重点基础研究发展规划项目(2007CB41170405) （2007CB41170405）
中国科学院南海海洋研究所知识创新工程领域前沿项目(LYQY200704) （LYQY200704）
国家高技术研究发展计划课题(2008AA09Z306) （2008AA09Z306）
国家自然科学基金项目(40576025) （40576025）
