Acquisition of a Multi-Anvil Press

收购多砧压机

• 批准号: 0444067
• 负责人: David Jenkins
• 金额: $ 14.8万
• 依托单位: SUNY at Binghamton
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-12-15 至 2007-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0444067&HistoricalAwards=false
• 关键词: Acquisition; Multi; Anvil; Press

EAR-0444067JenkinsThis proposal is for the acquisition of a multi-anvil press for the primary purpose of studying mineralogical reactions and mineral-composition variations relevant to ultra-high-pressure (UHP) metamorphism. Several projects have been identified that will be the initial focus of research. First, the upper-pressure stability of glaucophane, which breaks down to talc and jadeite, will be examined to try to resolve existing discrepancies in the location of this boundary. This reaction boundary defines the upper-pressure limit of the blueschist metamorphic facies and may correspond in pressure to the onset of UHP metamorphism (defined by the presence of coesite). Second, univariant reactions defining the conversion of the low-pressure assemblage zoisite + diopside-rich clinopyroxene to the high-pressure assemblage lawsonite + grossular-rich garnet in the system CaO-MgO-Al2O3-SiO2-H2O will be investigated to better understand the pressures at which lawsonite-bearing eclogites occur. Third, the possible expansion of the stability field of zoisite-bearing eclogites, limited by the reaction 6 zoisite = 4 grossular + 5 kyanite + coesite + 3 H2O, resulting from the addition of ferric iron to the above system will be examined. The latter two projects will help delimit the stability field of zoisite (or epidote) in eclogites from UPH terranes. This mineral may be an important host for returning water to Earth's mantle. The multi-anvil press requested in this proposal will support research on many other projects relevant to UHP metamorphism. The broader impacts of this proposal are (1) improving the research infrastructure at this institution by allowing research at pressures and temperatures that were not previously attainable and (2) by providing undergraduate and graduate students opportunities to conduct research relevant to planetary interiors.

该提案是为了获得一台多砧压力机，主要目的是研究与超高压（UHP）变质作用相关的矿物学反应和矿物成分变化。已经确定了几个项目，它们将是最初的研究重点。首先，我们将研究分解为滑石和硬玉的蓝帘石的上压稳定性，以试图解决这个边界位置上存在的差异。该反应边界确定了蓝片岩变质相的上压力极限，并可能对应于超高压变质作用的开始（由硅质岩的存在确定）。其次，将研究在CaO-MgO-Al2O3-SiO2-H2O体系中低压组合黝帘石+富辉石斜辉石向高压组合辉石+富辉石石榴石转化的单变反应，以更好地了解含辉石榴辉石发生的压力。第三，考察含黝帘石榴辉岩稳定性场的可能扩展，即在上述体系中加入铁后，6黝帘石= 4粗晶石+ 5蓝晶石+钴辉石+ 3 H2O的反应。后两个项目将有助于确定UPH地块榴辉岩中黝帘石（或绿帘石）的稳定性范围。这种矿物可能是将水送回地幔的重要宿主。本提案中要求的多砧压力机将支持与超高压变质作用有关的许多其他项目的研究。该提案的更广泛的影响是：(1)通过允许在以前无法实现的压力和温度下进行研究来改善该机构的研究基础设施；(2)通过为本科生和研究生提供进行与行星内部相关的研究的机会。