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鸟研究计划将调查热液年代学的55马到35马epizonal深成杂岩在卡普古斯塔夫霍尔姆，Imilik，Kialineq，和Nualik在中东格陵兰。 目的是确定与冰岛地幔柱和格陵兰岛与欧亚大陆之间地壳断裂有关的气候和地理变化引起的始新世陨石水稳定同位素组成的时间变化。 在丹麦岩石圈中心的支持下，1994年夏天从卡普古斯塔夫霍尔姆复合体中收集了用于本研究的样品，1995年夏天将从其余的深成中心收集样品。 研究是基于对深成中心角闪石和钾云母的放射性（40 Ar/39 Ar）年龄和氧、氢同位素组成的测定。 实验室研究最初将集中在热液矿物的相关系，成分和共生关系，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，以及对我们在北大西洋盆地和门户的古地理演变所伴随的气候变化方面的发现进行评估。