The Lauterbrunnen Migmatities: A Potential Source Area for a Granitic pluton? (Earth Science)

劳特布龙嫩混合岩：花岗岩岩体的潜在来源区？

• 批准号: 9450125
• 负责人: Sakiko Olsen
• 金额: $ 14.13万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1997-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9450125&HistoricalAwards=false
• 关键词: Lauterbrunnen; Migmatities; Potential; Source; Area

Many large granitic bodies (plutons) are thought to originate as partial melts at mid-crustal levels. However, there is as yet no clear understanding of the process of forming a large amount of melt under such conditions nor of the source and transport of the necessary H2O. This detailed study of two small but well-exposed areas in the Swiss Alps could reveal an incipient state of pluton formation. The proposed research will explore the feasibility of generating a granitic pluton from such an area by using several analytical techniques to characterize the rocks in major and trace element composition, estimates of P-T conditions, stable and radiogenic isotopes, and fluid inclusions. The results will also contribute toward a better understanding of overall crustal processes. Interactive activities include; recruiting a female graduate student to participate in the research; conducting a seminar at graduate level and acting as a guest lecturer in undergraduate classes with a special emphasis on promoting interest in natural resources, environmental and social impacts of resources exploitation, and conservation.

许多大型花岗岩体(深成岩体)被认为起源于地壳中层的部分熔融。然而，目前还不清楚在这种条件下形成大量熔体的过程，也不清楚必要的H2O的来源和运输。这项对瑞士阿尔卑斯山两个面积不大但暴露程度很高的区域的详细研究，可能揭示出岩体形成的初期状态。这项拟议的研究将通过使用几种分析技术来表征岩石的主要和微量元素组成、P-T条件估计、稳定和放射性同位素以及流体包裹体，来探索在该地区产生花岗岩岩体的可行性。这些结果还将有助于更好地了解整个地壳过程。互动活动包括：招募一名女研究生参与研究；举办研究生级别的研讨会，并在本科生班级担任客座讲师，特别强调提高人们对自然资源、资源开采的环境和社会影响以及保护的兴趣。