Tectonomagmatic Cycles and the Formation of Oceanic Crust at the Cleft Segment of the Juan de Fuca Ridge

根据这份合同，PI将继续参与对Juan de Fuca山脊裂口部分的合作研究。在与D. Stakes、M. Tivey等人的积极合作下，MBARI的船只和rov已经并将继续进行现场工作。PI的主要职责是对火山岩进行取样，解释火山地貌，并对岩石样本进行实验室分析。一个实地项目在2000年进行，另一个将在2002年进行。PI在1990年和1994年从该地区收集了更多的岩石样本。PI提出了轴向和离轴区域的流动映射，其目的和目的多种多样，其中之一是测试Kappel和Ryan的“分裂脊”模型，以确定在当前脊轴两侧形成对称陆型的构造和岩浆旋回。将利用~6km （150 ka）的轴向和离轴采样来验证这一想法，并阐明近轴区域地壳的形成和演化过程。计划对rov收集的样品和蜡芯样品进行主要元素和微量元素研究以及同位素研究的完整实验室计划。

Under this award, the PI will continue participating in a collaborative study of the Cleft segment of the Juan de Fuca ridge. The field work has been and will continue to be done with MBARI vessels and ROVs, in active collaboration with D. Stakes, M. Tivey, and others. The PI's main responsibility is in sampling of volcanic rocks, interpreting volcanic land forms, and undertaking laboratory analyses of the rock samples. One field program occurred in 2000, and another will take place in 2002. The PI has additional rock samples from the area collected in 1990 and 1994. The PI proposes flow mapping of the axial and off-axis region with a variety of goals and objectives, one of which is to test the "split-ridge" model of Kappel and Ryan for tectonic and magmatic cycles forming the symmetrical land forms on either side of the present ridge axis. Axial and off-axis sampling out to ~6km (150 ka) will be used to test this idea, and elucidate the processes of crust creation and evolution in the near-axis region. A full laboratory program of major and trace element studies and isotopic studies are planned for ROV-collected and wax cored samples.