Helium flux from the solid earth
Helium flux from the solid earth
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来自固体地球的氦通量
DOI：
10.2343/geochemj.20.227
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发表时间：
1986
影响因子：
0.8
通讯作者：
Y. Sano
中科院分区：
文献类型：
--
作者：
Y. Sano
考虑到太平洋深海沉积物孔隙水中的~ 3 He/~ 4 He比值以及陆壳区随沉积层厚度的变化，估算了固体地球各部分（洋底、大陆和火山区）的~ 3 He和~ 4 He通量。结果表明，大陆4 He通量占总流出量的很大一部分，而3 He的主要来源是火山区，包括洋中脊、热点和俯冲带。尽管海洋在地球表面占主导地位，但来自海底的氦-3通量对其在大气中的质量平衡贡献不大。根据3 He和4 He在大气中的总通量和存量，可以得到它们的平均停留时间分别为3.3 × 106和8.4 × 106年。
Taking into account the 3He/4He ratio in pore water of Pacific deep sea sediments and the ratio variation with thickness of sedimentary layers in the continental crust area, we estimated 3He and 4He fluxes for each part of the solid earth: ocean floor, the continent, and volcanic areas. Results suggest that the 4He flux from the continent accounts for large amount of total outflow, whereas the principal sources of 3He are volcanic areas including mid-ocean ridges, hot spots and subduction zones. Helium-3 flux from the ocean floor contributes little to its mass balance in the atmosphere in spite of the ocean's dominance in the surface of the earth. Based on the total fluxes and inventories of 3He and 4He in the atmosphere, their average residence times can be obtained as 3.3 × 106 and 8.4 × 106 years, respectively.