COLLABORATIVE RESEARCH: The Significance of Mineral Lineations in Ductilely Deformed Rocks

合作研究：延性变形岩石中矿物线理的意义

• 批准号: 9614521
• 负责人: Scott Paterson
• 金额: $ 6.2万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-01 至 2000-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9614521&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Significance; Mineral; Lineations

9614521 Paterson Mineral lineations are commonly observed in ductilely deformed crustal rocks, and they potentially record considerable kinematic information. However, there is currently debate about the significance and interpretation of mineral lineations, including whether they record regional displacement directions, regional stretching directions or heterogeneous strain. Flow partitioning and volume loss also are potential factors. This project will use the well-studied Cascade Core of the mid-Cretaceous orogeny in the North Cascades Mountain of Washington to investigate the kinematic significance of mineral lineations formed at mid-crustal depths. Successful results will be widely applicable to ductile deformation in many other orogens, may provide better procedures for understanding these lineations and allow further evaluation of flow fields in the mid crust.

在韧性变形的地壳岩石中，通常可以观察到9614521条帕特森矿物线理，它们可能记录了大量的运动学信息。然而，目前关于矿物线理的意义和解释存在争议，包括它们是否记录了区域位移方向、区域伸展方向或非均匀应变。流动分配和体积损失也是潜在的因素。该项目将利用华盛顿州北喀斯喀兹山脉白垩纪中期造山运动中研究得很好的喀斯特岩芯，来研究在地壳中部深处形成的矿物线条的运动学意义。成功的结果将广泛适用于许多其他造山带的韧性变形，可能为理解这些线理提供更好的程序，并允许进一步评估中地壳的流场。