Original composition and formation process of slab-derived deep brine from Kashio mineral spring in central Japan

Author:

Kusuhara FumitakeORCID,Kazahaya Kohei,Morikawa Noritoshi,Yasuhara Masaya,Tanaka Hidemi,Takahashi Masaaki,Tosaki Yuki

Abstract

AbstractBrine samples from the wells in the Kashio mineral spring (an “Arima-type” hot spring at Ooshika-Mura, central Japan) were analyzed to determine the original chemical and isotopic compositions of the deep brine end-member before its dilution by meteoric water and to elucidate the origin of the end-member. The trends of variation between Cl, δD, and δ18O indicated the existence of a two-component mixing system and a systematic variation in the mixing ratio, which were mentioned in previous studies. By carefully tracking the variation in tritium (3H) and atmospheric noble gas in the brine, the Cl concentration in the end-member was determined to be 24,000 mg/L. This value is consistent with the result of previous studies. Based on the estimated composition and other related data, we inferred that the end-member originated from slab-derived fluid, which in turn may have undergone oxygen isotope exchange reactions with minerals. Although both the Arima and Kashio brines are considered to be derived from fluid dehydrated from the Philippine Sea slab, the chemical and isotopic compositions of the Kashio end-member are different from those of the Arima end-member. In particular, the Kashio end-member is characterized by low Cl concentration (~ 40% lower than that in the Arima end-member), low hydrogen isotope ratio, and low 3He/4He ratio (1.4 Ra). These results indicate that the chemical and isotopic compositions of the slab-derived fluid are different for each location. The significant difference in δD could reflect the difference in the dehydration depth. Finally, the low temperature and relatively low 3He/4He ratio of the brine end-member could be explained by its long residence time within the crust.

Funder

Ministry of Education, Culture, Sports, Science and Technology

Publisher

Springer Science and Business Media LLC

Subject

Space and Planetary Science,Geology

Reference67 articles.

1. Amita K, Ohsawa S, Du J, Yamada M (2005) Origin of Arima-type deep thermal water from hot spring wells in Oita Plain, eastern Kyushu, Japan. J Hot Spring Sci 55:64–77 (in Japanese with English abstract)

2. Amita K, Ohsawa S, Nishimura K, Yamada M, Mishima T, Kazahaya K, Morikawa N, Hirajima T (2014) Origin of saline waters distributed along the Median Tectonic Line in south-west Japan: hydrogeochemical investigation on possibility of derivation of metamorphic dehydrated fluid from subducting oceanic. J Japanese Assoc Hydrol Sci 44:17–38 (in Japanese with English abstract)

3. Asai K, Koshimizu S (2019) 3H/3He-based groundwater ages for springs located at the foot of Mt. Fuji. J Groundw Hydrol 61:291–298 (in Japanese with English abstract)

4. Clark I, Fritz P (2000) Environmental isotopes in hydrogeology, 2nd edn. CRC Press LLC, Florida

5. Clayton RN, O’Neil JR, Mayeda TK (1972) Oxygen isotope exchange between quartz and water. J Geophys Res 77:3057–3067. https://doi.org/10.1029/JB077i017p03057

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3