Investigation on the correlated mechanisms between deep groundwater flow and material transport in the different plate tectonic fields

不同板块构造场深层地下水流与物质输运相关机制研究

• 批准号: 20241006
• 负责人: MAHARA Yasunori
• 金额: $ 23.63万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20241006/
• 关键词: 鹹水; 沃素同位体比; 塩素同位体比; 希ガス; 付加体; プレートテクトニクス; 希ガス濃度; 地下水年代測定; 海生有機物; タービダイト; 溶存希ガス

We collected brines from deep oil and natural gas reservoirs in forearc and backarc settings in the Japan arc and compared their ^<129>I/^<127>I, ^<36>Cl/Cl, dissolved noble gases and stable isotope (δD and δ^<18>O). We determined iodine ages of 22-53 Ma for brines from the backarc region by using an initial marine ^<129>I/^<127>I ratio of 1.5×10^<-12>. Because expansion of the Japan Sea started 25 Ma and ceased by 14 Ma, there is a great discrepancy between the iodine ages and the history of the formation of the Japan arc. We found no relationship between the ^<129>I/^<127>I ratio in deep brines and their tectonic settings.

我们收集了日本弧前和弧后环境中深层石油和天然气藏的卤水，并比较了它们的^<129>I/^<127>I、^<36>Cl/Cl、溶解稀有气体和稳定同位素（δD和δ^<18>O）。采用1.5×10 ~（-1）的初始海洋碘/碘比值，测定了弧后卤水的碘年龄为22-53 Ma<129><127><-12>。由于日本海的扩张始于25 Ma，止于14 Ma，因此碘年龄与日本弧形成的历史存在很大差异。我们没有发现深卤水中的^<129>I/^<127>I比值与其构造环境之间的关系。

项目成果

Groundwater dating by extimation of groundwater flow velocity and dissolved 4He accumulation rae calibrated

通过估算地下水流速和校准的溶解 4He 积累率来进行地下水测年

• 发表时间: 2009
• 期刊: Earth and Planetary Science Letters 287
• 作者: Y.Mahara;M.A.Harbermehl;T.hasegawa;K.Nakata;T.R.
• 通讯作者: T.R.

Separation of dissolved Kr from a water saple by means of a hollow fiber membrane

利用中空纤维膜从水样中分离溶解的氪

• 发表时间: 2009
• 期刊: Journal of Hydrology 376
• 作者: T.Ohta;Y.Mahara;N.Momoshima;F.Inoue;J.Shimada;R.Ikawa,
• 通讯作者: R.Ikawa,

Correlation between dissolved ^4He concentration and ^<36>Cl in groundwater at Aspo, Sweden.

瑞典Aspo地下水中溶解的^ 4 He浓度与^ 36 Cl之间的相关性。

• 发表时间: 2008
• 期刊: Applied Geochemistry 23
• 作者: Mahara Y.;Hasegawa T.;Miyakawa K;Ohta T.
• 通讯作者: Ohta T.

Observation of ^<228>Ra/^<226>Ra activity ratio, and concentrations of ^<226>Ra and 228Ra of surface seawaters in the Pacific side of Japan

日本太平洋沿岸表层海水^<228>Ra/^<226>Ra活度比、^<226>Ra、228Ra浓度观测

• 发表时间: 2009
• 作者: T.Ohta;T.Kubota;Y.Mahara;J.Sato
• 通讯作者: J.Sato

Comparison of depth profile of 129I and 14C concentration in the surface layer of soils collected from North Eastern Japan.

日本东北部土壤表层 129I 和 14C 浓度深度剖面比较。

• 发表时间: 2010
• 期刊: Radiocarbon 52
• 作者: Hiroyuki Matsuzaki;Yoko Sunohara;Tsuchiya;Yasuyuki Muramatsu;Yuji Maejima;Yosuke Miyairi;Kazuhiro Kato
• 通讯作者: Kazuhiro Kato