Structural Evolution of the Northern Range of Trinidad

特立尼达北部山脉的构造演化

• 批准号: 8920575
• 负责人: Robert Speed
• 金额: $ 1.75万
• 依托单位: Northwestern University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-05-01 至 1992-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8920575&HistoricalAwards=false
• 关键词: Structural; Evolution; Northern; Range; Trinidad

This Science in Developing Countries (SDC) Program award will support Professor Robert Speed of Northwestern University in a research collaboration with Professor Keith Rowley of the University of the West Indies in St. Augustine, Trinidad. The investigators intend to study the structural and tectonic evolution of the schist belt that forms the Northern Range of Trinidad. Their work will focus on (1) the sequence of structures in the schist belt, (2) their kinematics, mechanisms, and conditions of formation, (3) the kinematics of emplacement of the schist belt at its present position, (4) the structure of its southern margin, and (5) the ages of protolith deposition, metamorphism, unroofing, and final emplacement. The problems Drs. Speed and Rowley will be working on constitute some of the most significant unknowns in the Cenozoic evolution of the Caribbean-South American plate boundary. An improved understanding of the Northern Range should throw new light on (1) the most applicable of current models of late Cenozoic southeastern Caribbean plate boundary kinematics; (2) the evolution of regional structures, basins, and hydrocarbons of onland and offshore Trinidad; and (3) faulting in the Trinidad region, including the question whether Venezuela's El Pilar fault extends to Trinidad or not and the origin of Trinidadian seismicity and its hazard potential.

这项发展中国家科学（SDC）项目奖将支持西北大学的Robert Speed教授与特立尼达圣奥古斯丁西印度群岛大学的Keith Rowley教授合作进行研究。研究人员打算研究构成特立尼达北部山脉的片岩带的构造和构造演化。他们的工作将集中在(1)片岩带的构造序列；(2)片岩带的运动学、机制和形成条件；(3)片岩带目前位置的侵位运动学；(4)片岩带南缘的构造；(5)原岩沉积、变质、拆顶的年龄；最后就位。问题是。斯毕德和罗利将研究加勒比海-南美洲板块边界的新生代演化中一些最重要的未知因素。对北部山脉的进一步认识将有助于(1)目前最适用的晚新生代东南加勒比海板块边界运动学模型；(2)特立尼达陆地和近海区域构造、盆地和油气的演化；(3)特立尼达地区的断层，包括委内瑞拉的El Pilar断层是否延伸到特立尼达的问题，特立尼达地震活动的起源及其潜在的危险。