Geological, Geochemical and Mineralogical Active Vents on the Mid-Atlantic Ridge

只有两个热液系统- TAG和Snakepit -是已知的 在缓慢扩张的中大西洋海岭活动 博士 汤普森参加了一个大型潜水计划，这两个网站 去年冬天;目前的奖项提供他和他的同事 Humphris和Tivey博士与基金一起分析和解释 在最近的这次考察中收集的样本 从早期的采样程序中。 目标是：1）绘制 （2）确定喷口的性质、起源和 成矿作用的时空过程; 利用观测和模型对两个地点的演变情况进行分析; 4)决定了表生作用期间发生的化学交换 （5）估计这些沉积物对 全球地球化学收支和循环;以及6）评估 硫化物矿床的经济意义。

Only two hydrothermal systems -- TAG and Snakepit -- are known to be active on the slow-spreading Mid-Atlantic Ridge. Dr. Thompson participated on a large diving program to both sites last winter; the present award provides he and his colleagues Drs. Humphris and Tivey with funds to analyze and interpret the samples collected on both this most recent expedition and ones from earlier sampling programs. Objectives are to: 1) map the vent sites in detail; 2) determine the nature, origin and time/space processes of mineralization; 3) compare the evolution of the two sites using both observations and models; 4) determine chemical exchanges that occur during supergene alterations; 5) estimate the significance of these deposits to global geochemical budgets and cycles; and 6) assess the economic significance of the sulfide deposits.