SGER: Basement Sill, Antarctica: Constraints from its PGE Abundance Patterns and Isotopic Compositions on Magma Source Characteristics and Crystallization Processes

本项目为南极费拉尔岩浆省基底基底和Dais侵入叶的PGE丰度和Hf、Nd、Sr和Pb同位素比值的测量提供了小额探索性研究资助。这个省在冈瓦纳大陆的分裂中起了关键作用。待测试的模型是由羽流活动产生的岩浆与化石俯冲带的减压融化。PGE数据还将用于评估岩浆结晶过程中挥发物的行为，其他证据表明，这些挥发物可能已经达到饱和。要研究的样本是在2005年在南极洲举行的由美国国家科学基金会赞助的岩浆野外实验室研讨会上收集的。这项研究的结果将与其他与会者的补充数据相结合，以建立一个新的费拉尔岩浆作用的多学科模型。这项工作的更广泛影响包括国际合作和通过对K12学生的公共宣传进行非正式科学教育。

This Small Grant for Exploratory Research supports measurement of PGE abundances and Hf, Nd, Sr and Pb isotopic ratios of the Basement Sill and Dais Intrusion lobe of the Ferrar Magmatic Province, Antarctica. This province played a key role in the breakup of Gondwanaland. Models to be tested are magma production by plume activity versus decompression melting in a fossil subduction zone. The PGE data will also be used to evaluate the behavior of volatiles during magma crystallization, which other evidence indicates may have reached saturation. The samples to be studied were collected during the NSF-sponsored, Magmatic Field Laboratory Workshop held in Antarctica in 2005. This study's results will be compliled with complementary data from other attendees to develop a new multidisciplinary model of Ferrar magmatism.The broader impacts fo this work include international collaboration and informal science education through public outreach to K12 students.