A Far-Field Hydrothermal Plume from Loihi Seamount
A Far-Field Hydrothermal Plume from Loihi Seamount
复制标题
洛伊希海山的远场热液羽流
作者：
J. Lupton
在中太平洋北部，一个广泛的氦羽流从夏威夷侧翼的洛伊希海山发出。最大的氦信号出现在大约1100米的深度，与Loihi海山正上方的近场羽流深度相同。虽然这种氦羽流在夏威夷附近最强，那里1100米深处的3 He/4 He比达到了高于大气比28%的值，但在北纬24°以北400多公里处，它可以被非常清楚地探测到。在夏威夷群岛以东约2000公里的135°W，15°N至20°N之间的同一等密度线上也存在过量的3 He。
An extensive helium plume in the north central Pacific emanates from Loihi Seamount on the flanks of Hawaii. The maximum helium signal is found at a depth of about 1100 meters, the same depth as the near-field plume directly above Loihi Seamount. Although this helium plume is strongest near Hawaii, where the 3He/4He ratio at a depth of about 1100 meters reaches values 28 percent above the atmospheric ratio, it can be detected quite clearly at latitude 24°N, over 400 kilometers to the north. Excess 3He is also present on the same isopycnal between 15°N and 20°N at 135°W, some 2000 kilometers east of the Hawaiian Islands.