Lithospheric Coupling At The Caribbean-South America Plate Boundary: Deformation And Exhumation Of Ductile Crust In Oblique Convergence

加勒比-南美板块边界岩石圈耦合：斜辐合中延性地壳的变形与折返

• 批准号: 0126166
• 负责人: Christian Teyssier
• 金额: $ 14.81万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-01-01 至 2004-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0126166&HistoricalAwards=false
• 关键词: Lithospheric; Coupling; Caribbean; South; America

Theoretical models of motion transfer from the ductile lower lithosphere and mantle upward through the brittle-ductile transition and the brittle upper crust are as yet inadequate to account for many phenomena, partly because of lack of access to intact crust sections that represent deformation results from the same overall tectonic environment. This project utilizes the Caribbean-South America plate boundary, which has been the locus of oblique convergence for the past 50 million years to address this problem. This system has brought a sequence of rocks to the surface that represent a continuous vertical section of the crust exposed from west to east along the contact between the two plates from Venezuela to Trinidad. Structural and thermochronologic data will be collected and used to develop, refine and test models for the origin, response partitioning, and exhumation of this sequence. Results have the potential to place significant constraints on rheological differences within the lithosphere, which is of fundamental importance in understanding tectonic systems and plate interactions.

运动模型的运动模型从延性下岩石圈和地幔通过脆性延性过渡和脆性上皮向上向上向上转移，但尚不在考虑许多现象，部分原因是由于缺乏获得完整的外壳截面，从而代表了从相同整体构造环境中代表变形的结果。 该项目利用了加勒比南 - 南美板块边界，在过去的5000万年中，该板块一直是倾斜融合的源头来解决这个问题。 该系统将一系列岩石带到了表面，这代表了从委内瑞拉到特立尼达的两个板之间从西到东的地壳的连续垂直截面。 将收集结构和热量数据学数据，并用于开发，完善和测试模型，以实现此序列的起源，响应分区和挖掘。 结果有可能对岩石圈内的流变差异施加重大限制，这对于理解构造系统和板块相互作用至关重要。