Magnetic Petrology of the Lower Crust: Record from Mafic Xenoliths

磁性岩石学的目标是整合 磁性研究与岩石学研究的目的 了解磁化的发展和变化 在岩石中。 主要研究者将启动一项长期的 下陆壳磁性岩石学的研究。 作为该计划的初始阶段，该提案侧重于 会聚弧边缘和大陆边缘的地壳捕虏体 裂谷带 （1）火山中心的基性岩包体 阿留申岛弧，（2）日本，（3）格兰德河裂谷和（4）南极洲 此外，还将通过岩相微探针方法进行分析 到标准的岩石磁化技术。 结果 预计将提供候选源材料的限制， Magsat揭示的长波磁异常， 区域航磁调查 他们还应该提供基本的 有关岩石控制的信息， 下地壳岩石的磁化行为。

Magnetic petrology has as its goal the integration of magnetic property studies with petrologic studies for the purpose of understand the development and modification of magnetization in rocks. The principal investigator will initiate a long-term study of the magnetic petrology of the lower continental crust. As the initial phase of this program, this proposal focuses on crustal xenoliths from convergent arc margins and continental rift zones. Mafic xenoliths from volcanic centers in the (1) Aleutian arc, (2) Japan, (3) Rio Grande Rift and (4) Antarctica will be analyzed by petrographic-microprobe methods in addition to standard rock magnetization techniques. The results are expected to provide constraints on candidate source materials for the long-wavelength magnetic anomalies revealed by Magsat and regional aeromagnetic surveys. They should also provide basic information on petrologic controls responsible for the magnetization behavior of lower crustal rocks.