The Effects of Gas Hydrates on Seismic Properties of Sediments and the Relation between the Occurrence of Bottom Simulating Reflectors and Vertical Tectonics - the Peruvian Margin

天然气水合物对沉积物地震性质的影响及底部模拟反射体的出现与垂直构造的关系——秘鲁边缘

• 批准号: 9906999
• 负责人: Carolyn Ruppel
• 金额: $ 2.48万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-10-01 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906999&HistoricalAwards=false
• 关键词: Effects; Gas; Hydrates; Seismic; Properties

99-06891 Pecher99-07137 Clift99-06999 RuppelThe recommended proposal is for a marine geological field program in the Lima Basin of the Peruvian margin to examine the dynamics of gas hydrate formation, by modeling and testing the relationship between vertical tectonic activity and the stability of gas hydrate and related development of bottom-simulating reflectors (BSR's). The work integrates seismic data, inferred stratigraphic relationships and subsidence, sedimentation, and erosion rates, and numerical modeling techniques in this area of high sediment fluid flux, high organic productivity, and active vertical tectonism. These characteristics place the Peruvian margin as an end-member in continental margins with documented hydrate and BSR occurrence. The research will serve as a baseline for the proposed Peruvian Margin drilling (ODP drilling proposal 355-Full 7). The field program will occur aboard two R/V Sonne cruises in 2000, and will consist of "piggyback" ocean bottom seismometer work involving the deployment of German ocean-bottom seismometers. The proposed work will provide a test of the hypothesis that vertical tectonics may suppress the formation of gas hydrates, with a subsequent lack of BSR formation.

推荐的建议是在秘鲁边缘的利马盆地进行一项海洋地质实地项目，通过模拟和测试垂直构造活动与天然气水合物稳定性之间的关系以及模拟海底反射层（BSR）的相关发展，研究天然气水合物形成的动力学。 这项工作整合了地震数据，推断地层关系和沉降，沉积和侵蚀速率，以及在这一领域的高沉积物流体通量，高有机生产力和活跃的垂直构造的数值模拟技术。 这些特征使秘鲁边缘成为大陆边缘的端员，有记录的水合物和BSR存在。 该研究将作为拟议的秘鲁边缘钻探（ODP钻探提案355-Full 7）的基线。 实地方案将于2000年在“索内”号考察船上进行，并将包括“搭载”海底地震仪工作，包括部署德国海底地震仪。 拟议的工作将提供一个假设，垂直构造可能会抑制天然气水合物的形成，与随后缺乏BSR形成的测试。