Interaction Between the Iceland Mantle-Plume and the Hydrosphere: Tectonic and Climatic Effects on Hydrothermal Solutions

冰岛地幔柱与水圈之间的相互作用：构造和气候对热液的影响

• 批准号: 9506469
• 负责人: Dennis Bird
• 金额: $ 13.5万
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506469&HistoricalAwards=false
• 关键词: Interaction; Between; Iceland; Mantle; Plume

9506469 Bird The research program will investigate hydrothermal chronology of the 55 Ma to 35 Ma epizonal plutonic complexes at Kap Gustav Holm, Imilik, Kialineq, and Nualik in central East Greenland. The objective is to determine temporal variations in the stable isotope composition of Eocene meteoritic water caused by climatic and geographic changes related to initiation of the Iceland mantle plume and crustal rifting between Greenland and Eurasia. With support from the Danish Lithosphere Center samples for this study were collected from the Kap Gustav Holm complex in the summer of 1994 and samples from the remaining plutonic centers will be collected during the summer of 1995. The research is based on determinations of radiometric (40Ar/39Ar) ages and oxygen and hydrogen isotope compositions of amphiboles and K-micas from the plutonic centers. Laboratory studies will initially focus on phase relations, compositions, and parageneses of hydrothermal minerals and will be completed in approximately 1.5 years. The remainder of the project will involve synthesis and analysis of the data, and evaluation of our findings in terms of climate changes that accompanied the paleogeographic evolution of the North Atlantic Ocean basins and gateways.

9506469 Bird 该研究项目将调查东格陵兰岛中部 Kap Gustav Holm、Imilik、Kialineq 和 Nualik 55 Ma 至 35 Ma 的地表深成杂岩的热液年代学。 目的是确定始新世陨石水稳定同位素组成的时间变化，这些变化是由与冰岛地幔柱的起始和格陵兰岛与欧亚大陆之间的地壳裂谷相关的气候和地理变化引起的。 在丹麦岩石圈中心的支持下，本研究的样本于 1994 年夏季从 Kap Gustav Holm 复合体采集，其余深成中心的样本将于 1995 年夏季采集。该研究基于对深成中心角闪石和 K-云母的辐射年龄 (40Ar/39Ar) 年龄以及氧和氢同位素组成的测定。 实验室研究最初将集中于热液矿物的相关系、成分和共生，并将在大约 1.5 年内完成。 该项目的其余部分将涉及数据的综合和分析，以及对伴随北大西洋盆地和门户古地理演化的气候变化的研究结果进行评估。