Rb-Sr Systematics of Mississippi Valley-Type Ore Deposits-- Sulfides, Gangue Minerals, and Fluid Inclusions

密西西比河谷型矿床的铷锶系统学——硫化物、脉石矿物和流体包裹体

• 批准号: 9018350
• 负责人: Joyce Brannon
• 金额: $ 11.5万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-03-01 至 1994-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9018350&HistoricalAwards=false
• 关键词: Rb; Sr; Systematics; Mississippi; Valley

This project is to improve the scientific understanding of Mississippi-Valley-type (MVT) ore deposits through comprehensive geochemical characterization of the ore-forming fluids. The approach stresses use of 87Sr/86Sr as an isotopic tracer in minerals deposited throughout the paragenesis, specifically including sulfides which have very low Sr concentrations. As appropriate for specific samples the Rb-Sr analyses will be complemented by isotopic analyses of Pb and S or C and O and abundance determinations of trace elements (Sr, Rb, K, Ca, Na, Mg, Pb, U, halogens) (some of these analyses to be performed by collaborators). These analyses will provide significant constraints on the provenance of the ore-forming fluids and their flow paths from source to site of deposition. Studies will focus on MVT districts in the Viburnum Trend, the Upper Mississippi Valley district, the Tri-State district and the Northern Arkansas Zinc district.

这个项目是为了提高科学的认识， 密西西比河谷型（MVT）矿床， 成矿流体的地球化学特征的 方法强调使用87 Sr/86 Sr作为同位素示踪剂， 矿物沉积在整个共生，特别是 包括具有非常低的Sr浓度的硫化物。 作为 Rb-Sr分析将适用于特定样品， 辅以Pb和S或C和O的同位素分析， 微量元素（Sr，Rb，K，Ca，Na， Mg、Pb、U、卤素）（其中一些分析将由 合作者）。 这些分析将提供重要的 成矿流体的物源制约及其对成矿的影响 从源头到沉积地点的流动路径。 研究将集中 在密西西比河上游的Viburnum趋势的MVT地区 山谷区、三州区和北方阿肯色州 锌区。