Chronology of Hydrothermal Vents, Juan de Fuca Ridge

私人侦探们已经获得了为期8天的阿尔文潜水经费，以确定胡安·德·富卡山脊奋进号部分的仙女城堡遗址活跃热液喷口的年表。新旧样品将用于：1)提供同位素和矿物学测量；2)检验测年方法的假设；3)绘制研究区域烟囱分布图；模拟这些烟囱的生长。视觉和分析数据将在新旧样品之间进行比较。定年将基于U和衰变系列同位素之间的不平衡，特别是th228/Ra228，Ra228/Ra226和Pb210/Pb。ALVIN收集的流体将进行分析，随后的矿物学研究将分别根据与J. Edmond （MIT）和M. Tivey （WHOI）签订的单独合同进行。其益处将包括Th228和Pb210定年技术的评估，以及对热液喷口系统时间矿物学和流体演化的进一步理解。

The P.I.s have been funded for 8 days of ALVIN dives to establish the chronology of active hydrothermal vents at the Fairy castle site on the Endeavor segment of the Juan de Fuca Ridge. Both old and new samples will be used to: 1) provided isotopic and mineralogic measurements: 2) test assumptions of the dating methods; 3) map the chimneys in the study area; 4) model the growth of these chimneys. Visual and analytical data will be compared between the new and old samples. Dating will be based on the disequilibria among isotopes of the U and The decay series, specifically th228/Ra228,Ra228/Ra226 and Pb210/Pb. Fluids collected by ALVIN will be analyzed and accompaying mineralogic studies will be performed under separate contracts to J. Edmond (MIT) and M. Tivey (WHOI), respectively. Benefits will include and evaluation of the Th228 and Pb210 dating techniques and forman improved understanding of the temporal mineralogic and fluid evolution of hydrothermal vent systems.