Characterization of Stratified Iron-Oxide-Apatite Ores

层状氧化铁磷灰石矿石的表征

• 批准号: 9814761
• 负责人: H. Richard Naslund
• 金额: $ 17.5万
• 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: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9814761&HistoricalAwards=false
• 关键词: Characterization; Stratified; Iron; Oxide; Apatite

9814761NaslundDeposits of magnetite, apatite, and hematite are important ores of iron in many parts of the world. In addition, many of these deposits are associated with economic concentrations of Cu, Au, Ag, U, and rare earth elements. Most of these deposits appear to have formed from iron- and phosphorous-rich liquids (magmas or fluids) of extreme compositions which have either intruded at depth, erupted onto the surface, or hydrothermally replaced host rocks. Many of these deposits contain laterally-extensive, stratified, iron oxide- and apatite-rich units. These stratified iron oxide-apatite ores do not appear to have formed by the same mechanism in all localities. The purpose of this project is to examine the field relationships, textural characteristics, and compositions of stratified iron oxide-apatite ores from a variety of localities, to determine what characteristics can best be used to discriminate between the various mechanisms that have been proposed for their origin. Field studies will sample and map in detail stratified iron oxide-apatite ores from Sierra Bandera, Chile. Samples from stratified iron oxide-apatite ores at El Laco, Chile; Kiruna, Sweden; Pilot Knob, Missouri; and Cornwall, Pennsylvania have already been collected. Experimental studies will examine the stability of iron-oxide liquids and fluids over a range of temperatures, pressures, and volatile compositions. This project will be a cooperative study between the State University of New York at Binghamton, the Universidad de Santiago, Chile, and the Swedish Museum of Natural History.

9814761Naslund 磁铁矿、磷灰石和赤铁矿矿床是世界许多地方重要的铁矿石。 此外，许多矿床都与铜、金、银、铀和稀土元素的经济集中有关。 大多数这些沉积物似乎是由富含铁和磷的极端成分的液体（岩浆或流体）形成的，这些液体要么侵入深处，喷发到地表，要么热液取代了主岩。 许多这些矿床含有横向延伸的、分层的、富含氧化铁和磷灰石的单元。 这些层状氧化铁-磷灰石矿石似乎并非在所有地区都是通过相同的机制形成的。 该项目的目的是检查来自不同地点的层状氧化铁-磷灰石矿石的场关系、结构特征和成分，以确定哪些特征最适合用于区分已提出的各种机制。起源。 实地研究将对智利班德拉山脉的分层氧化铁磷灰石矿石进行采样并详细绘制地图。 来自智利埃尔拉科的分层氧化铁-磷灰石矿石的样品；瑞典基律纳；飞行员旋钮，密苏里州；和宾夕法尼亚州康沃尔郡已经收集。 实验研究将检查氧化铁液体和流体在一定温度、压力和挥发性成分范围内的稳定性。 该项目将是纽约州立大学宾厄姆顿分校、智利圣地亚哥大学和瑞典自然历史博物馆之间的合作研究。