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

基本信息

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

项目摘要

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.

该奖项由国家科学基金会极地计划办公室提供，支持缅因州大学的研究人员参加日本南极研究探险（JARE）的一项探险，以研究Enderby Land富含铍的矿物质。铍是地壳岩石中的罕见元素，在颗粒类面（高温和压力以及相对干燥的条件）变质岩石中，富集尤其不寻常。该项目着重于在东部凯西湾（Eastern Casey Bay），南极洲恩德比（Enderby Land）的东部凯西湾（Eastern Casey Bay），东部凯西湾（Eanterby Land）东部的颗粒岩含量纳皮尔（Napier Complex），富含铍富含的颗粒岩岩。主要目的是检验以下假设：铍起源于托管岩岩的定质剂，而不是是pegmatitic岩浆的组成部分。现场工作将在1998/99年的澳大利亚野外季节在Enderby Land进行，这是日本南极研究探险队的一部分，标题为“南极岩石圈的结构和进化”。矿物和岩石组成将用于确定pegmatites及其宿主岩石结晶的演化和条件。该项目的结果将提供一些关于颗粒相的高温和低水活动特征下铍的地球化学行为的重要见解。