Igneous Petrology of the New Skaergaard Stratigraphic Reference Column

新斯卡尔加德地层参考柱的火成岩岩石学

• 批准号: 0208075
• 负责人: Charles Lesher
• 金额: $ 13.99万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-07-01 至 2004-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0208075&HistoricalAwards=false
• 关键词: Igneous; Petrology; New; Skaergaard; Stratigraphic

Igneous Petrology of the New Skaergaard Stratigraphic Reference ColumnEAR-0208075PI: Lesher The PI and his colleagues have established a new high-resolution reference column of the layered series of the Skaergaard intrusion from drill core from the Platinova exploration program in 1989-90 and surface samples collected and located by GPS during the summer of 2000. This was done as a collaboration between U.S. and Danish scientists, and students. Skaergaard differentiation has been highly controversial and the divergence of opinions is likely to remain unless new fundamental observations are brought to bear on the problems. The primary objective of this proposal is to document the petrology and geochemistry of this stratigraphically controlled suite of previously collected drill core and surface samples using well established petrographical and analytical tools. This composite stratigraphic column will provide a basis for rigorous hypothesis testing of the mechanisms of Skaergaard evolution that have eluded petrologists in the absence of good stratigraphic control. The main product will be a detailed mineralogical and chemical stratigraphy at a sampling interval of 10 m and less. Observations will be linked to the analysis of the physical factors that govern the behavior of the crystallizing magma and its liquid line of descent. This will provide the foundation for evaluating the roles of crystal sedimentation, in-situ crystallization, compaction, and infiltration metasomatism at Skaergaard and other layered igneous intrusions.

新Skaergaard地层参考柱的火成岩学-0208075 PI：Lesher PI和他的同事们已经建立了一个新的Skaergaard侵入体分层系列的高分辨率参考柱，该参考柱来自1989-90年Platinova勘探计划的岩心和2000年夏天通过GPS收集和定位的地表样品。 这是美国和丹麦科学家和学生合作完成的。Skaergaard分化一直备受争议，除非新的基本意见被带到承担的问题，否则意见分歧可能会继续存在。本建议书的主要目的是使用完善的岩相学和分析工具，记录这套地层控制的先前采集的岩心和地表样本的岩石学和地球化学。这一复合地层柱将为严格假设检验Skaergaard演化机制提供基础，而在缺乏良好地层控制的情况下，岩石学家们一直未能找到Skaergaard演化机制。主要产品将是详细的矿物学和化学地层学，取样间隔为10米或更短，观测将与控制结晶岩浆行为及其液体下降线的物理因素的分析相联系。这将为评估Skaergaard和其他层状火成岩侵入体的晶体沉积、原位结晶、压实和渗透交代作用提供基础。