Collaborative Research: Spatial and Temporal Growth of Upper Crustal Intrusions, Henry Mountains, Utah

合作研究：上地壳侵入的时空增长，亨利山，犹他州

• 批准号: 1220340
• 负责人: Sven Morgan
• 金额: $ 8.29万
• 依托单位: Central Michigan University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-08-15 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1220340&HistoricalAwards=false
• 关键词: Collaborative; Research; Spatial; Temporal; Growth

The goal of this project is to take advantage of the exceptional exposures of shallow crustal igneous intrusions in the Henry Mountains of southern Utah to study in detail the spatial and temporal growth of plutons constructed from multiple magma pulses. Because the intrusions were emplaced during a tectonic lull, they are largely free of complicating tectonic structures and specific variables related to magma emplacement can be evaluated, some that is difficult to in many other geologic settings. Each of the five separate intrusive centers in the Henry Mountains preserves a different stage of the evolution of a shallowly constructed igneous system, ranging from a small-total-volume body comprised mostly of dikes to a fully mature body comprised of dozens of relatively large intrusions. This project is focusing on detailed studies of three of these intrusive centers: one each at an early, moderate, and advanced stage of development. Using data field, geochemical, geochronogical, and paleomagnetic data from these intrusive centers, a general construction model for a shallow igneous complex is being constructed. Synthesis of the data and construction of models for data emplacement are being facilitated by the integration of data into geographic information system. Ultimately, a series of fully 3-D models for each intrusive center will be created using constraints from the collected data to study growth of the composite intrusions in space and time. This research will advance our understanding of how igneous intrusions grow in the shallow crust. These intrusions are important for many reasons, including that they feed volcanic eruptions, they serve as heat reservoirs for geothermal fields, and that fluids associated with the intrusions are an important souce of economic mineral deposits. This project is specifically designed to further our knowledge of: (1) the geometries of the plumbing system in shallow igneous systems, (2) how these systems evolve as magma pulses intrude sequentially, (3) magma intrusion rates and their variability in space and time, and (4) the manifestation of magma pulses at different spatial and temporal scales structurally, geochemically, etc. The project is a collaborative effort between researchers at Eastern Carolina University, SUNY College at Geneseo, and Central Michigan University. In addition to the scientific goals of the project, the research is providing for the training of graduate and undergraduate students in STEM disciplines at all three institutions and results of the study will be used for the development of resources for teaching, research, and outreach.

该项目的目标是利用犹他州南部亨利山脉异常暴露的浅层地壳火成岩侵入体，详细研究由多个岩浆脉冲构成的深成岩块的空间和时间增长。由于侵入岩是在构造间歇期间侵位的，它们在很大程度上没有复杂的构造构造，可以评估与岩浆侵位有关的特定变量，其中一些变量在许多其他地质环境中很难评估。亨利山脉的五个独立的侵入中心中的每一个都保留了浅层构造的火成岩系统演化的不同阶段，从主要由岩脉组成的小体积岩体到由数十个相对较大的侵入体组成的完全成熟的岩体。这个项目集中于对三个入侵中心的详细研究：每个中心都处于开发的早期、中期和高级阶段。利用这些侵入中心的数据场、地球化学、地质年代学和古地磁资料，正在建立一个浅层火成岩杂岩的一般构造模型。通过将数据整合到地理信息系统中，数据的合成和数据布设模型的建立正在得到便利。最终，将使用收集的数据中的约束条件为每个侵入中心创建一系列全三维模型，以研究复合侵入在空间和时间上的增长。这项研究将促进我们对火成岩如何在地壳浅层生长的理解。这些侵入岩之所以重要，原因有很多，包括它们为火山喷发提供了燃料，它们是地热田的热储，与这些侵入岩有关的流体是经济矿藏的重要来源。该项目旨在进一步加深我们对以下方面的了解：(1)浅层火成岩系统中管道系统的几何形状；(2)这些系统如何随着岩浆脉冲的顺序侵入而演化；(3)岩浆侵入速率及其在空间和时间上的变异性；以及(4)岩浆脉冲在不同空间和时间尺度上的结构、地球化学等方面的表现。除了该项目的科学目标外，这项研究还为所有三个机构的STEM学科的研究生和本科生提供培训，研究结果将用于开发教学、研究和推广资源。