Collaborative Research: Colorado Rockies Experiment and Seismic Transects (CREST): Time-space Patterns of Cenozoic Uplift-magmatism and their Correspondence to the Aspen Anomaly

合作研究：科罗拉多落基山脉实验和地震断面（CREST）：新生代隆升岩浆作用的时空模式及其与阿斯彭异常的对应

• 批准号: 0607693
• 负责人: Richard Aster
• 金额: $ 47.5万
• 依托单位: New Mexico Institute of Mining and Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-11-01 至 2011-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0607693&HistoricalAwards=false
• 关键词: Collaborative; Research; Colorado; Rockies; Experiment

0607693AsterThis project is a follow up to a series of previous CD funded Rocky Mountain focused projects building on the discovery of a low velocity anomaly in the mantle beneath central Colorado. The proposed project involves a wide variety of techniques assembled to address the cause of the so called "Aspen anomaly", its history, and its effect on crustal evolution. The PIs are interested in the connection between changes in the mantle causing modification of surface topography. They have observed that the Aspen anomaly is located beneath the highest portion of the Rocky Mountains. They equate low mantle seismic velocities with low mantle densities to cause uplift. They will investigate whether the very large velocity variations in the mantle beneath this area are: a) in the lithosphere or asthenosphere, b) reflect Proterozoic lithospheric sutures reactivated by Cenozoic tectonism, c) are caused by a plume, and d) are caused by the presence of melt. These are all important and relevant questions for Continental Dynamics. Specifically, the PIs will use: -passive seismology to better define the anomaly using tomography, receiver functions, surface waves, and anisotrophy;-geological studies (magmatic history, low temperature thermochronology, tectonic geomorphology) to identify Cenozoic tectonic and magmatic history to define long term and current history;-geodynamical models of topography uplift and mantle processes to study their connection.

0607693Asterthisthis项目是一系列以前的CD资助的落基山（Rocky Mountain）项目的后续项目，该项目是基于发现科罗拉多州中部地幔的低速异常的基础。 拟议的项目涉及各种各样的技术，以解决所谓的“ Aspen异常”，其历史及其对地壳进化的影响。 PI对地幔变化之间的联系感兴趣，从而导致表面形貌的修饰。 他们观察到asspen异常位于落基山的最高部分。 它们等同地等同于地幔地震速度低，地幔密度较低，以引起隆升。 他们将研究该区域下地幔的速度变化是否很大：a）在岩石圈或软圈中，b）反射蛋白质的岩石圈缝合线，由cenozoic tectonism重新激活，c）由羽流引起，而d）由熔融的存在引起。 这些都是大陆动力学的重要和相关问题。 具体而言，PI将使用： - 使用断层扫描，接收器功能，表面波和各向异性的通行性震荡学来更好地定义异常，地址研究（磁性历史，低温历史，构造地貌学）来识别库纳卡的构造构造和磁编码历史的长期和当前的历史和当前的型号；