Project Upper Crust

这笔赠款为上地壳项目提供持续支持， 加强检索和分析来自 美国大陆内部的前寒武纪基底 States. 上地壳项目的主要科学目标是 定义岩石圈的结构和组成， 北美大陆内部，并利用这些信息 完善北部大地构造发展的模型 早、中元古代美洲大陆。 这些目标将通过收购、策展和 来自埋藏的前寒武纪基底的样品分布， 通常会被丢弃在钻井现场，包括推广 从许多地点增加样本量， 协作成本分摊。

This grant provides continued support for Project Upper Crust, a program of enhanced retrieval and analysis of samples from the Precambrian basement of the continental interior of the United States. The major scientific goals of Project Upper Crust are to define the structure and composition of the lithosphere in the continental interior of North America and to use that information to refine models for the geotectonic development of the North American continent during the early and middle Proterozoic. These goals will be implemented by acquisition, curation, and distribution of samples from the buried Precambrian basement that would normally be discarded at drill sites, including promotion of increased sample sizes from many of the sites through collaborative cost-sharing.