Collaborative Research: Co-operative Program: The Origin and Evolution of the Karoo Basalt Group, Southern Africa

该项目旨在确定南部非洲卡鲁大陆洪泛玄武岩省的形成时间、成因和演化。将特别强调使用野外测绘和化学技术对玄武岩流动的逐流地层学，以及它们的相对和绝对年龄。这些数据将被用来限制这一异常大的火山事件的物理性质和持续时间，将目前散布在纳米比亚、博茨瓦纳、莱索托和南非南部大片地区的大量卡鲁玄武岩侵蚀残留物进行关联，并将流动与在南部非洲发现的众多卡鲁岩堤相关联。有关该省物理演化的更多知识将与成分数据结合使用，以模拟玄武岩岩浆产生过程中的地幔熔融、分馏和地壳同化作用，并限制其来源的成分。

This project is to determine the timing, genesis, and evolution of the Karoo continental flood basalt province in Southern Africa. Particular emphasis will be placed on the flow-by-flow stratigraphy of the basalt flows using field mapping and chemical techniques, and their relative and absolute ages. These data will be used to constrain both the physical nature and the duration of this exceptionally large volcanic event, to correlate the numerous eroded remnants of Karoo basalt now scattered over large areas of southern Namibia, Botswana, Lesotho, and South Africa, and to correlate the flows with the numerous Karoo dikes found across southern Africa. The increased knowledge of the physical evolution of the province will then be used in conjunction with the compositional data to model mantle melting, fractionation and crustal assimilation in the production of the basaltic magmas and to constrain the composition of their source.