Quantifying Metamorphic Processes With Remote Sensing and Field Spectroscopy

利用遥感和现场光谱学量化变质过程

• 批准号: 0003453
• 负责人: Edward Duke
• 金额: --
• 依托单位: South Dakota School of Mines and Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-02-01 至 2003-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0003453&HistoricalAwards=false
• 关键词: Quantifying; Metamorphic; Processes; Remote; Sensing

EAR-0003453DukeMetamorphic processes include the chemical and physical transformations that occur to rocks subjected to elevated temperatures and pressures in the earth's crust. Metamorphic processes are an integral part of the long-term cycles that control the distribution of elements among the solid earth, oceans, and atmosphere. This research examines the application of reflectance spectroscopy in the visible and near infrared wavelength region (350-2500 nm) as an alternative method for characterizing the mineralogy of metamorphic rocks and generating maps of mineral distribution. Spectroscopic methods offer two distinct advantages relative to conventional mapping methods: 1) acquisition of spectra is rapid and inexpensive, and 2) measurements can be made in the field with portable spectrometers or remotely with aircraft or satellite based imaging spectrometers. In this project, methods are being developed to map the distribution of metamorphic minerals using advanced airborne and satellite-based remote sensing data, which are being provided through a unique partnership with NASA. Mapping methods being developed under this research project, however, can be applied to address many other earth science problems and are currently being implemented in studies of mineral deposit exploration, vegetation classification and land cover change, and forestry resource monitoring.

变质作用包括地壳中岩石在高温高压下发生的化学和物理变化。 变质过程是长期循环的一个组成部分，控制着元素在固体地球、海洋和大气中的分布。 本研究探讨了反射光谱在可见光和近红外波长区域（350-2500 nm）的应用，作为表征变质岩矿物学和生成矿物分布图的替代方法。 光谱方法相对于传统的测绘方法提供了两个明显的优点：1）光谱的获取是快速且廉价的，以及2）测量可以在现场用便携式光谱仪或远程地用基于航空器或卫星的成像光谱仪进行。 在该项目中，正在开发利用先进的航空和卫星遥感数据绘制变质矿物分布图的方法，这些数据是通过与美国航天局的独特伙伴关系提供的。 然而，在本研究项目下开发的制图方法可用于解决许多其他地球科学问题，目前正在矿物存款勘探、植被分类和土地覆盖变化以及森林资源监测等研究中实施。