Beryllium in Granulite-Facies Pegmatites in Archean Napier Complex, Antarctica

南极洲太古代纳皮尔杂岩中麻粒岩相伟晶岩中的铍

• 批准号: 9813569
• 负责人: Edward Grew
• 金额: $ 2.5万
• 依托单位: University of Maine
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-06-01 至 2000-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813569&HistoricalAwards=false
• 关键词: Beryllium; Granulite; Facies; Pegmatites; Archean

This award, provided by the Office of Polar Programs of the National Science Foundation, supports participation of a researcher from the University of Maine in an expedition of the Japanese Antarctic Research Expedition (JARE) to study beryllium enriched minerals in Enderby Land. Beryllium is a rare element in crustal rocks and enrichments are especially unusual in granulite-facies (high temperature and pressure, and relatively dry conditions) metamorphic rocks. This project focuses on unique beryllium-enriched pegmatites in the Archean ultra-high temperature (up to 1000 degrees C) granulite-facies Napier Complex in eastern Casey Bay, Enderby Land, East Antarctica. The primary objective is to test the hypothesis that the beryllium originated in the metasediments hosting the pegmatites rather than being a component of a pegmatitic magma. Field work will be conducted during the 1998/99 austral field season in Enderby Land as a part of the Japanese Antarctic Research Expedition's project entitled "Structure and Evolution of East Antarctic Lithosphere". Mineral and rock compositions will be used to determine the evolution and conditions of crystallization of the pegmatites and their host rocks. The results of the project will provide some important insights on the geochemical behavior of beryllium under the high temperatures and low water activities characteristic of the granulite facies.

该奖项由美国国家科学基金会极地项目办公室提供，支持缅因大学的一名研究人员参加日本南极考察队 (JARE) 的考察，以研究恩德比地富含铍的矿物。 铍是地壳岩石中的稀有元素，在麻粒岩相（高温高压和相对干燥的条件）变质岩中富集尤其不寻常。该项目重点研究南极洲东部恩德比地凯西湾东部太古代超高温（高达 1000 摄氏度）麻粒岩相 Napier 杂岩中独特的富铍伟晶岩。主要目的是检验铍起源于伟晶岩的变沉积岩而不是伟晶岩岩浆的组成部分的假设。 野外工作将在 1998/99 年南极野外季节期间在恩德比地进行，作为日本南极考察队题为“东南极岩石圈的结构和演化”项目的一部分。 矿物和岩石成分将用于确定伟晶岩及其主岩的演化和结晶条件。该项目的结果将为了解麻粒岩相高温和低水活度特征下铍的地球化学行为提供一些重要的见解。