CAREER: Teaching through Research: Plume-Ridge Interactions in the Galapagos as Focus of an Integrated InterdisciplinaryChemistry Curricular Initiative

该学院早期职业发展（CAREER）奖由 化学和地球科学支持跨学科研究， 卡伦·S博士关于地幔动力学和地幔柱-山脊相互作用的教育。 哈普，化学系，劳伦斯大学。 调查 将重点关注位于加拉帕戈斯南部的加拉帕戈斯热点 传播中心（GSC），南美洲西海岸。 岩浆 这里产生的是由热点和大洋中脊控制的， 作为地幔流动模式的示踪剂， 两个来源，详细的岩石圈结构和动力学。 的 区域火山特征之间的关系，特别是沃尔夫-达尔文火山 Lineament（WDL）以及平塔，马尔切纳和Genovesa群岛， 脊和热点还没有被很好地理解。 的三个机制 了解该地区已经提出：WDL管道羽流材料， 脊;在线性构造的岩石圈弱点;脊上涌， 由于邻近热点而增加了熔体产量。 每个 机制导致不同的地球化学变化的预测。 样品熔岩将从沃尔夫、达尔文和吉诺韦萨及其 化学成分测定 数据将被拟合到模型中， 确定哪种机制最能描述该地区的地质活动。 该项目将由本科生实施。 此外，本发明还提供了一种方法， 将采用以调查为基础的方法和团队方法， 化学实验室，包括一个新的环境实验室课程， 在劳伦斯大学和本科生将参与 与当地学校和社区团体进行外联。 加拉帕戈斯群岛火山岛的起源并不清楚 由于洋脊之间复杂的相互作用， 局部热点或羽流。 地质机制将由 研究各个岛屿熔岩流的化学成分 本研究与本科生教育相结合， 将在探索实验室中制备， 在加拉帕戈斯的野外工作

This Faculty Early Career Development (CAREER) award by the Divisions of Chemistry and Earth Sciences supports interdisciplinary research and education on mantle dynamics and plume-ridge interactions by Dr. Karen S. Harpp, Department of Chemistry, Lawrence University. The investigation will focus on the Galapagos hotspot, located south of the Galapagos Spreading Center (GSC), off the west coast of South America. The magmas produced here are controlled by both hotspots and mid-ocean ridges, thus serving as tracers of mantle flow patterns, extent of mixing between the two sources, and detailed lithospheric structure and dynamics. The relationship of regional volcanic features, specifically the Wolf-Darwin Lineament (WDL) as well as Pinta, Marchena, and Genovesa islands, to the ridge and hotspot are not well understood. Three mechanisms for understanding the region have been proposed: WDL pipes plume material to the ridge; lithospheric weakness at the lineament; ridge upwelling, with increased melt production because of the adjacent hotspot. Each mechanism results in different predictions for geochemical variation. Sample lavas will be collected from Wolf, Darwin, and Genovesa and their chemical compositions determined. The data will be fit to models to determine which mechanism best describes geologic activity in the area. The project will be carried out by undergraduates. In addition, inquiry-based methods and team approaches will be introduced into chemistry laboratories, including a new environmental laboratory course, at Lawrence University and undergraduate students will be involved in outreach with local school and community groups. The origin of volcanic islands in the Galapagos archipelago is not well understood because of the complex interaction between ocean ridges and local hotspots or plumes. The geological mechanism will be determined by studying the chemical composition of the lava flows at various islands. The research is integrated with education of undergraduate students who will be prepared in discovery-based laboratories prior to experience in field work in the Galapagos.