Antarctic Rift and Hot Spot Volcanism

该奖项支持对南极洲新第三纪火山活动的研究。这项工作解决了两个问题：1)塑造南极西部（包括南极半岛和南极横贯山脉）的潜在构造力的性质；2)与全球地幔非均质性有关的亚极地地幔性质，以及地幔对流动力学。本次研究的重点是在Balleny、Scott和Peter I群岛、Hallett和墨尔本火山省、Jones山脉和深海钻探点274,323和690C选定的玄武岩的地球化学（主要和微量元素；锶、钕、铅同位素）。这项工作将确定来自各个火山省的玄武岩的地球化学特征，以确定区域关系，并评估这些省的热点与裂谷情景。

This award supports a study of Noegene volcanism in Antarctica. The work addresses two issues: 1) the nature of the underlying tectonic forces shaping west Antarctica, including the Antarctic Peninsula and the Transantarctic Mountains, and 2) the nature of subpolar mantle in relation to global mantle heterogeneities, and the dynamics of mantle convection. The investigation focuses on the geochemistry (major and trace elements; Strontium, Neodymium, Lead isotopes) of selected basalts from Balleny, Scott and Peter I Islands, the Hallett and Melbourne Volcanic Provinces, the Jones Mountains, and Deep Sea Drilling Sites 274, 323 and 690C. The work will determine the geochemical signatures for basalts from the various volcanic provinces in order to ascertain regional relationships and to evaluate hot spot versus rifting scenarios for these provinces.