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Upwelling of Deep-seated Fluid in the Sikhote-Alin Region, Far East of the Eurasian Plate
Aquatic Geochemistry ( IF 1.6 ) Pub Date : 2021-09-09 , DOI: 10.1007/s10498-021-09398-y
Hitomi Nakamura 1 , Noritoshi Morikawa 1 , Hikaru Iwamori 2, 3 , Natalia Kharitonova 4, 5 , Ivan Bragin 5 , Georgy Chelnokov 6 , Qing Chang 7
Affiliation  

Spring waters with high-pCO2 content are widely distributed in the Sikhote-Alin region in Russia. Mukhen spa is one such spring located in the northern Sikhote-Alin region. This spa has two types of upwelling spring waters and exhibits distinct chemical signatures. One of the springs originates from a shallow aquifer and features hydrogen and oxygen isotopic ratios of meteoric water with a high 3He/4He ratio, whereas the other originates from a deeper aquifer and features a distinctly negative δ18O with a lower 3He/4He ratio. To understand this apparent discrepancy and the water circulation dynamics beneath Mukhen springs, we utilized all published data concerning the major solute elements and isotopic ratios of Mukhen spring waters and compared them with the He isotopic compositions on several springs in the far eastern region, which are newly analyzed in this study. The results show that the shallow aquifer comprises meteoric water that interacts with the crust enhanced by the gas component welling up from deep underground, while the fluid in deep aquifer fingerprinted the hydration reaction of silicate and involves a mantle component possibly delivered by a deep-seated fluid and/or gas upwelling along the tectonic fault through the western margin of the Sikhote-Alin region.



中文翻译:

欧亚板块远东锡霍特-阿林地区深层流体的上涌

pCO 2含量高的泉水广泛分布在俄罗斯的锡霍特-阿林地区。穆肯温泉就是这样一个位于锡霍特-阿林地区北部的温泉。这个水疗中心有两种类型的上涌泉水,并表现出不同的化学特征。其中一个泉源来自浅层含水层,具有高3 He/ 4 He比率的大气水的氢氧同位素比,而另一个泉源来自更深的含水层,具有明显负的 δ 18 O 和较低的3 He / 4他比。为了了解这种明显的差异和木亨泉下的水循环动力学,我们利用了所有已发表的关于木亨泉水的主要溶质元素和同位素比的数据,并将它们与远东地区几个泉水的 He 同位素组成进行了比较,这些数据是本研究新分析。结果表明,浅层含水层包括大气水,这些大气水与地壳相互作用,由地下深处涌出的气体成分增强,而深层含水层中的流体则对硅酸盐的水化反应进行了指纹识别,并涉及可能由深层地幔输送的地幔成分。流体和/或气体沿构造断层上涌穿过锡霍特-阿林地区的西缘。

更新日期:2021-09-09
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