Microscale Pb and S Isotope Variations in Hydrothermal Minerals from the Vibrurnum Pb-Zn Belt, S.E. Missouri

东南部荚蒾铅锌带热液矿物中的微尺度铅和硫同位素变化

• 批准号: 9105326
• 负责人: Stanley Hart
• 金额: $ 18万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-06-01 至 1993-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9105326&HistoricalAwards=false
• 关键词: Microscale; Pb; Isotope; Variations; Hydrothermal

This study proposes analysis, using ion microprobe and conventional mass spectrometric techniques, of three important constituents of the ore paragenesis of the Viburnum Trend: 1) The "Octahedral" and "Cubic" stages of galena, including the more complex textures which occur in addition to the simple forms. (Pb and S isotopes will both be determined by ion microprobe.) 2) Other major sulfide phases, including pyrite, marcasite and chalcopyrite. (Pb and S isotopes by ion microprobe; Pb supplemented by conventional MS.) 3) Hydrothermal dolomite. (Pb isotopes in distinct cathodoluminescent zones and intrazonal bands by conventional MS.) This work will include late-stage calcite. This study is designed to provide critical information about: 1) the source of the Pb and S which formed the Viburnum Trend ores and, as a consequence, 2) the number of identifiable fluid sources which contributed to the formation of the ores, and, 3) the mechanism(s) which precipitated the sulfide ores.

这项研究提出了分析，使用离子微探针和 传统的质谱技术，三个重要的 琼花带矿石共生组分：1） 方铅矿的“八面体”和“立方”阶段，包括 除了简单的纹理之外， forms. (Pb和S同位素都将由离子测定 微探针） 2)其他主要的硫化物相，包括黄铁矿， 白铁矿和黄铜矿。 (Pb和硫同位素 微探针; Pb补充常规MS。） 第三章 热液白云岩 (Pb不同的同位素 阴极射线发光带和带内带 MS.） 这项工作将包括后期方解石。 本研究旨在提供以下方面的关键信息：1） 形成荚状珊瑚趋势矿的铅和硫的来源 因此，2）可识别流体的数量 有助于形成矿石的来源，以及，3） 硫化矿沉淀的机理。