Towards a Comprehensive Model for the Origin of the Irish Ore Deposits: A Stable Isotope, Heavy Isotope, REE Fluid Inclusion and Petrologic Study

建立爱尔兰矿床成因的综合模型：稳定同位素、重同位素、稀土流体包裹体和岩石学研究

• 批准号: 8805045
• 负责人: Anne LeHuray
• 金额: --
• 依托单位: Columbia University Lamont Doherty Earth Observatory
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-01 至 1991-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8805045&HistoricalAwards=false
• 关键词: Towards; Comprehensive; Model; Origin; Irish

Continued research is proposed on MVT type Zn-Pb ore deposits in Ireland. These deposits are related by common metal sources in underlying metasediments and a regional hydrothermal plumbing system controlled by large fault systems. Further research goals address: (1) the chemistry and isotopic characteristics of the metal-rich fluid, (2) the cause of oxidation of metasediments underlying major ore deposits (i.e. is this related to reduction of sea water sulfate?), (3) geographic controls on sulfur isotope chemistry in locally-derived sulfur-rich fluids. Specific objectives include (1) mineralogic, fluid inclusion, and isotope studies of feeder veins, (2) background studies of unaltered meta- sediments to evaluate alteration associated with mineralization, (3) detailed studies of oxidized metasediments to characterize the alteration fluids.

建议继续对爱尔兰MVT型锌铅矿床进行研究。这些矿床与下伏变质沉积物中的共同金属源和受大型断层系统控制的区域热液管道系统有关。进一步的研究目标包括：（1）富金属流体的化学和同位素特征;（2）主要矿床下伏变质沉积物氧化的原因（即是否与海水硫酸盐还原有关？）(3)对局部富硫流体中硫同位素化学的地理控制。具体目标包括：（1）矿物学、流体包裹体和补给脉的同位素研究;（2）未蚀变Meta沉积物的背景研究，以评估与矿化有关的蚀变;（3）氧化变质沉积物的详细研究，以表征蚀变流体。