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

建议继续对爱尔兰mvt型铅锌矿床进行研究。这些矿床与下伏沉积层中共同的金属来源和受大断裂系统控制的区域性热液管道系统有关。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)主要矿床下的变质沉积物氧化的原因（即这是否与海水硫酸盐的还原有关？）；(3)本地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、流体包裹体和喂矿脉的同位素研究；(2)对未蚀变的变质沉积物进行背景研究，以评价与矿化相关的蚀变；(3)对氧化变质沉积物进行详细研究，以表征蚀变流体。

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.