Collaborative Research: Lithospheric Structure and Evolution of the Rocky Mountains: Phase 2

合作研究：落基山脉岩石圈结构和演化：第二阶段

• 批准号: 0207875
• 负责人: Eugene Humphreys
• 金额: $ 5万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0207875&HistoricalAwards=false
• 关键词: Collaborative; Research; Lithospheric; Structure; Evolution

0207875HumphreysThis award provides continued funding for the CD-ROM (Continental Dynamics of the Rocky Mountains) collaborative investigation which is designed to understand the tectonic evolution of the lithosphere of the southern Rocky Mountains. A transect from Wyoming to New Mexico is providing an opportunity to evaluate the hypothesis that lithospheric architecture of the Southwest reflects a resolvable mixture of structures that formed during early Proterozoic assembly of the continent and modifications that took place during younger intracratonic tectonism that were themselves influenced by the Proterozoic compositional structure. Phase 1 (1997-2001) was successful in substantially verifying this hypothesis. The PIs imaged the Cheyenne Belt and Jemez lineament; both are interpreted to be Paleoproterozoic paleosubduction zones that also show long-lived and strong influence on younger intracratonic tectonism. Both are also associated with lateral changes in deep chemical lithosphere, such that the mantle provinces can be linked to crustal provinces, demonstrating the antiquity of the mantle transitions. With this "bridge funding" award, the Principal Investigators will conduct an annual workshop, complete the analysis of data sets generated in Phase 1, increase productivity in terms of published papers, and prepare for Phase 2 of the CD-ROM project.***

0207875 Humphreys该奖项为CD-ROM（落基山脉大陆动力学）合作调查提供持续资金，该调查旨在了解落基山脉南部岩石圈的构造演化。 从怀俄明州到新墨西哥州的一条横断面提供了一个机会来评估这样一种假设，即西南部的岩石圈结构反映了一种可分辨的混合结构，这种结构是在早元古代大陆组装过程中形成的，而在年轻的克拉通内构造活动中发生的修改本身又受到元古代成分结构的影响。 第一阶段（1997-2001年）成功地基本验证了这一假设。 PI成像的夏延带和Jemez线性构造;两者都被解释为古元古代古俯冲带，也表现出长期和强大的影响年轻的克拉通内构造。 两者都与深部化学岩石圈的横向变化有关，因此地幔区可以与地壳区联系起来，表明地幔过渡的古老性。 有了这笔“桥梁资金”，主要研究者将举办年度研讨会，完成第一阶段产生的数据集分析，提高发表论文的生产力，并为光盘项目的第二阶段做准备。