CAREER: Magmatism in the African Western Rift: Lithospheric Structure and Melting Dynamics

职业：非洲西部裂谷的岩浆作用：岩石圈结构和熔化动力学

• 批准号: 9508112
• 负责人: Tanya Furman
• 金额: $ 9万
• 依托单位: University of Virginia Main Campus
• 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: 1995-06-01 至 1998-11-12
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9508112&HistoricalAwards=false
• 关键词: CAREER; Magmatism; African; Western; Rift

9508112 Furman The goal of this project is to understand the genesis of alkalic volcanic rocks associated with continental extension in the African Western Rift. This research will use the geochemistry of young volcanic rocks to document interaction between asthenospheric and lithospheric melts and characterize the relative contributions from these two source reservoirs. The results of this project will help constrain global geodynamic models of source reservoir mixing, and will also advance understanding of the relationships between metasomatism, magmatism and rifting in continental environments. This proposal is part of a long-term research program that integrates field, geochemical, isotopic, experimental and geophysical data to determine the dynamics of melting and melt extraction in continental rifts. The African Rift was selected for detailed study because it is the type locality for rift-related magmatism. Comprehensive analysis of appropriate samples is critical to interpretation, and this research will provide the most robust data set for assessment of magma dynamics in the continental rift environment. The educational component of this proposal represents a focused effort to encourage participation of African-American students in the earth sciences. A middle/high school instructional unit (grades 7-9) will be developed on African geography and resources. This unit will be provide a counterbalance to current foci on the creative aspects of African heritage, by presenting a vehicle through which African-American students can express enthusiasm for science while still developing a sense of cultural identity. A college course for non-science majors will be developed with the same goal, but the material will be significantly more detailed and rigorous. Modern and creative pedagogical techniques will be used in developing educational materials for both courses.

这个项目的目标是了解与非洲西部裂谷大陆伸展有关的碱性火山岩的成因。本研究将利用年轻火山岩的地球化学来记录软流圈和岩石圈熔体之间的相互作用，并表征这两个源储层的相对贡献。该项目的结果将有助于限制全球源储混合地球动力学模型，并将促进对大陆环境中交代、岩浆作用和裂谷作用之间关系的理解。该提案是一个长期研究计划的一部分，该计划整合了野外、地球化学、同位素、实验和地球物理数据，以确定大陆裂谷中融化和熔体提取的动力学。非洲裂谷是裂谷相关岩浆活动的典型地区，因此选择了非洲裂谷进行详细研究。对合适样品的综合分析是解释的关键，该研究将为大陆裂谷环境岩浆动力学评估提供最可靠的数据集。该提案的教育部分是鼓励非裔美国学生参与地球科学的重点努力。将开设一个关于非洲地理和资源的初高中教学单元（7-9年级）。本单元将提供一种平衡，目前的焦点是非洲遗产的创造性方面，通过展示一个工具，通过它，非洲裔美国学生可以表达对科学的热情，同时仍然发展文化认同感。针对非科学专业的大学课程也将以同样的目标开发，但材料将更加详细和严格。现代和创造性的教学技术将用于为这两门课程编写教材。