US-France Cooperative Research: Island Fault Blocks in the Northeastern Caribbean

美法合作研究：加勒比东北部岛屿断块

• 批准号: 0340639
• 负责人: Paul Mann
• 金额: $ 1.16万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-02-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0340639&HistoricalAwards=false
• 关键词: US; France; Cooperative; Research; Island

0340639MannThis three-year U.S.-France cooperative research project involves Paul Mann at the University of Texas at Austin and Jean-Claude Hippolyte at the Universite de Savoie in France. They will perform fault striation studies applied to problems of active tectonics in the northeastern Caribbean. Their previous studies of northwestern and southern Puerto Rico identified fault scarps with earthquake potential in these densely populated coastal regions. In this proposal, they continue fault striation studies on the densely populated islands of Puerto Rico and Vieques (U.S. territory), St. Croix, St. John, St. Thomas, U.S.Virgin Islands, Tortola and Virgin Gorda (British territories). Except for Puerto Rico, these islands form emergent fault blocks framing a major extensional or oblique-slip rifted basin complex underlying the deep-water Anegada Passage.Their specific objectives include: 1) identifying late Cenozoic sedimentary units affected by faulting (offshore, active faults will be used to target likely areas where these faults might extend onshore); 2) finding manmade outcrops in rock quarries and along road cuts that expose striated fault planes; 3) measuring striated fault surfaces to determine the types and orientations of faults present; 4) examining faults in different aged stratigraphic units, establish a fault kinematic history for the opening of the Anegada Passage; and 5) using marine data to better understand the offshore extensions of faults. The U.S. investigator brings to the project expertise in quantitative plate reconstructions, land based geological studies and marine geophysical studies. This is complemented by French expertise on the tectonics of highly curved orogenic belts including the Alps, the Carpathians and the Caribbean. The project will advance understanding of seismicity in this densely populated Caribbean region.The project is jointly supported by the National Science Foundation (NSF) and the Centre National de la Recherche Scientifique (CNRS). NSF will support the expenses of the U.S. investigator and the CNRS covers expenses of the French investigator.

0340639曼海姆三年制美国-法国合作研究项目涉及得克萨斯大学奥斯汀分校的保罗·曼和法国萨瓦大学的让-克洛德·希波吕特。 他们将对加勒比东北部活动构造问题进行断层条纹研究。 他们先前对波多黎各西北部和南部的研究发现，在这些人口稠密的沿海地区，断层陡坎具有地震的可能性。 在这一提议中，他们继续对人口稠密的波多黎各和别克斯岛（美国领土）、圣克鲁瓦、圣约翰、圣托马斯、美属维尔京群岛、托尔托拉和维尔京戈尔达（英国领土）进行断层条纹研究。 除波多黎各外，这些岛屿形成了一个新出现的断块，构成了一个主要的伸展或挤压-滑动裂陷盆地复合体，位于深水的阿托萨达海峡之下，其具体目标包括：1）识别受断层影响的晚新生代沉积单元（海上活动断层将用于确定这些断层可能向陆上延伸的可能区域）; 2）在采石场和沿着道路开挖处寻找暴露出条纹状断层面的人工露头; 3）测量条纹状断层面以确定存在的断层的类型和方向; 4）检查不同年代地层单元中的断层，建立阿萨尼亚达通道开放的断层运动学历史; 5）利用海洋数据更好地了解断层的近海延伸。美国调查员为该项目带来了定量板块重建、陆地地质研究和海洋地球物理研究方面的专业知识。 法国在阿尔卑斯山、喀尔巴阡山和加勒比海等高度弯曲的造山带的构造方面的专门知识，对这一点起到了补充作用。 该项目将增进对加勒比这一人口稠密地区地震活动的了解，得到国家科学基金会和国家科学研究中心的联合支助。 NSF将承担美国研究者的费用，CNRS承担法国研究者的费用。