Chronology of Hydrothermal Vents, Juan de Fuca Ridge

P.I.已经获得了8天的阿尔文潜水资金，以建立胡安德·富卡山脊奋进段仙女城堡遗址上活跃的热液喷口的年表。新旧样品将用于：1)提供同位素和矿物学测量：2)测试测年方法的假设；3)绘制研究区域的烟囱图；4)模拟这些烟囱的生长。视觉和分析数据将在新旧样本之间进行比较。测年将基于U和衰变系列的同位素之间的不平衡，特别是Th228/Ra228，Ra228/Ra226和Pb210/Pb。阿尔文收集的流体将进行分析，伴随的矿物学研究将分别与J.Edmond(麻省理工学院)和M.Tivey(WHOI)签订单独的合同。好处将包括对Th228和Pb210测年技术的评估，以及Forman对热液喷口系统的时间矿物学和流体演化的了解。

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.