Chronology of Hydrothermal Vents, Juan de Fuca Ridge

私人侦探已经得到了8天的阿尔文潜水的资金， 建立活跃热液喷口的年表， 胡安·德富卡河奋进段的仙女城堡遗址 岭新旧样品将用于：1）提供 同位素和矿物学测量：2）测试假设的 测年方法; 3）绘制研究区烟囱图; 4）模型 这些烟囱的生长。视觉和分析数据将 对比新旧样品。约会将基于 铀和衰变系同位素之间的不平衡， 特别是Th 228/Ra 228、Ra 228/Ra 226和Pb 210/Pb。流体 将对ALVIN收集的矿物进行分析， 研究将根据与J. Edmond的单独合同进行 (MIT)和M.（WHOI）。好处包括 Th 228和Pb 210测年技术的评价， 提高对时间矿物学的理解， 热液喷口系统的流体演化

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.