RUI: COLLABORATIVE RESEARCH: Tectonic and Stratigraphic Evolution of the Loreto Basin, Baja California Sur: A Transform-Rift Basin

RUI：合作研究：南下加利福尼亚州洛雷托盆地的构造和地层演化：一个转换裂谷盆地

• 批准号: 9117269
• 负责人: Rebecca Dorsey
• 金额: $ 6.02万
• 依托单位: Northern Arizona University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-12-01 至 1994-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117269&HistoricalAwards=false
• 关键词: RUI; COLLABORATIVE; RESEARCH; Tectonic; Stratigraphic

This collaborative project will study the structural and stratigraphic evolution of the Pliocene-Quaternary Loreto Basin, which lies along the margin of the Gulf of California in Baja California Sur. A transform-rift system beginning at 5Ma formed the Loreto and related basins but they have not been studied in detail until now, despite good exposure and accessibility. Magnetostratigraphy will be combined with radiometric dating of four tuffs and paleontological data of other workers to give good chronostratigraphic control of the basin's evolution. These data will permit investigation of the role of growth structures on the stratigraphic geometries in the basin. The results will resolve major outstanding problems in the tectonics of the Gulf of California, and will have important implications for the tectonics of obliquely-rifted margins in general.

该合作项目将研究上新世-第四纪洛雷托盆地的构造和地层演化，该盆地位于南下加利福尼亚州加利福尼亚州海湾边缘。一个始于5 Ma的转换裂谷系统形成了洛雷托及其相关盆地，尽管它们具有很好的曝光性和可达性，但直到现在还没有得到详细的研究。磁性地层学将与四个凝灰岩的放射性测年和其他工作人员的古生物数据相结合，以很好地控制盆地的演化。这些数据将有助于研究生长构造对盆地地层几何形状的作用。这一结果将解决加利福尼亚州海湾构造中的主要突出问题，并将对总体上斜向裂谷边缘的构造产生重要影响。