Collaborative Research: Crust-Mantle Interactions at an Oblique Arc-Continent Collision Zone: The SE Caribbean Plate Boundary

合作研究：斜弧大陆碰撞带的壳幔相互作用：东南加勒比板块边界

• 批准号: 0607783
• 负责人: Maria Beatrice Magnani
• 金额: $ 4.01万
• 依托单位: University of Memphis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-07-01 至 2009-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607783&HistoricalAwards=false
• 关键词: Collaborative; Research; Crust; Mantle; Interactions

0607783MagnaniThis award will support a two year extension of a currently funded CD project (BOLIVAR) which is investigating the processes of continental accretion in the Caribbean. Specifically, the project is investigating how arcs accrete to the northern edge of south America using various geologic (mapping, structure), geochemical (Ar-Ar and U-Pb Geochronology), and seismic (active MCS with onshore/offshore recording using OBS instruments, passive array) techniques. There is also a geodynamic modeling study that, very innovatively, includes the dynamics of crust-mantle interaction. The overall goal of the project is to understand further the geometry and chronology of a world class, arc-continent accretion event. Seismic/geological cross-sections are being derived for several transects across the orogen at different ages of collision. The group of investigators includes highly capable seismologists in both active and passive seismology, as well as geologists familiar with the orogenic developments on land. The cooperation with Venezuelan scientists and students is excellent. In Venezuela, BOLIVAR has a formal multi-year counterpart, GEODINOS, funded by the Venezuelan government seismological organization FUNVISIS. With FUNVISIS, the PIs have completed a successful data acquisition effort consisting of active and passive land-marine seismic experiments, and numerous geologic/geochemical studies on the Venezuelan mainland and in the Leeward Antilles archipelago. Their study area is about the size of California and its continental margin, an area greater than 600,000 km 2 , and has an equally complex Late Mesozoic-Cenozoic history.

0607783 Magnani该奖项将支持目前资助的CD项目（BOLIVAR）延长两年，该项目正在调查加勒比地区的大陆增生过程。 具体而言，该项目正在利用各种地质（绘图、结构）、地球化学（Ar-Ar和U-Pb地质年代学）和地震（主动MCS，使用OBS仪器、被动阵列进行陆上/海上记录）技术，调查弧是如何附着到南美洲北方边缘的。 还有一个地球动力学模拟研究，非常创新地包括壳幔相互作用的动力学。 该项目的总体目标是进一步了解世界级弧-陆增生事件的几何学和年代学。 目前正在对造山带上不同碰撞年代的几个断面进行地震/地质剖面分析。 调查小组包括在主动和被动地震学方面能力很强的地震学家，以及熟悉陆地上造山运动发展的地质学家。 与委内瑞拉科学家和学生的合作非常好。在委内瑞拉，BOLIVAR有一个正式的多年合作伙伴GEODINOS，由委内瑞拉政府地震组织FUNVISIS资助。 利用FUNVISIS，研究所成功地完成了数据采集工作，包括主动和被动陆地-海洋地震实验，以及对委内瑞拉大陆和背风安的列斯群岛的许多地质/地球化学研究。 他们的研究区域大约相当于加州及其大陆边缘的面积，面积超过60万平方公里，并且具有同样复杂的晚中生代-新生代历史。