Provenance of Cretaceous Forearc Basin Strata, Pennisular Ranges of the Californias: Implications for Paleogeography and Tectonics

白垩纪弧前盆地地层、加利福尼亚半岛山脉的来源：对古地理和构造的启示

• 批准号: 9418384
• 负责人: David Kimbrough
• 金额: $ 12.27万
• 依托单位: San Diego State University Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-01-01 至 1999-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9418384&HistoricalAwards=false
• 关键词: Provenance; Cretaceous; Forearc; Basin; Strata

9418384 Kimbrough The Mesozoic to Recent tectonic history of western North America involved subductions, arrival and translations of terranes due to oblique relative plate motions, uplift and sedimentation, rotation and final amalgamations to North America. Within this framework many discrepancies exist between paleomagnetic data and geologic data concerning amount of origin parallel displacement and the timing of those displacements, as well as difference in models of uplift of batholiths and the fate of this erosion products. This project will focus on syn-orogenic conglomerate shed from the rising peninsular ranges batholiths into forearc basins. Distinctive geologic and geochemical characteristics of the batholiths will be used to specify source areas for the forearc basins. Results will greatly increase the geological basis for discriminating between "fixist" vs. "mobilist" models for orogen- parallel transport of terranes outboard of the batholiths, and should help tip the scales on several unresloved problems of the California border lands.

9418384金布罗 北美西部中生代至近代的构造历史包括板块相对倾斜运动引起的俯冲、到达和平移、隆起和沉积、旋转以及最终合并到北美。在这个框架内，古地磁数据和地质数据之间存在许多差异，涉及原始平行位移量和这些位移的时间，以及岩基抬升模型和这种侵蚀产物的命运的差异。该项目将侧重于从上升的半岛山脉岩基流入弧前盆地的同造山砾岩。 将利用岩基独特的地质和地球化学特征来确定弧前盆地的源区。这些结果将大大增加区分造山带-岩基外侧岩石平行迁移的“固定主义者”与“活动主义者”模式的地质基础，并有助于解决加州边界土地上几个未解决的问题。