Helium‐3 emission from Nevado Del Ruiz Volcano, Colombia
Helium‐3 emission from Nevado Del Ruiz Volcano, Colombia
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哥伦比亚内瓦多德尔鲁伊斯火山排放的 He-3
DOI：
10.1029/gl014i010p01035
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发表时间：
1987
影响因子：
5.2
通讯作者：
H. Wakita
中科院分区：
文献类型：
--
作者：
S. Williams;Y. Sano;H. Wakita
在位于哥伦比亚内华达德尔鲁伊斯火山周围的七个地点的九个气体和热沃茨样本中观察到了高达6.6Ratm的高氦-3/氦-4比率（大气比率1.40 × 10−6的6.6倍）。该比率的值随着与火山口的距离而减小。这种趋势与日本中部Ontake火山首次报道的模式相吻合，并表明个别火山周围氦同位素比率的一般特征。在六个月内两次取样的一个排气口处的校正氦-3/氦-4比率增加。这被解释为意味着氦的地幔贡献可能随着时间的推移而增加。
High helium-3/helium-4 ratios, up to 6.6Ratm (6.6 times the atmospheric ratio of 1.40 × 10−6) were observed in nine samples of gases and hot waters from seven sites located around the volcano Nevado del Ruiz, Colombia. The values of the ratio decrease with distance from the crater. Such a tendency coincides well with the pattern first reported from the volcano Ontake, central Japan, and suggests a general signature of helium isotope ratios around individual volcanoes. The corrected helium-3/helium-4 ratios at one gas vent sampled twice over six months increased. This is interpreted to mean that the mantle contribution of helium may have increased with time.