Flow of Hydrothermal Solution in the Crust and Mechanism of Rock Alteration

地壳热液流动与岩石蚀变机制

• 批准号: 05232104
• 负责人: YAMASAKI Nakamichi
• 金额: $ 81.28万
• 依托单位: Kochi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05232104/
• 关键词: water-rock interaction; change of cracks; control of cracks; hot-dry rock; heat extraction; pH measurement; 反応シミュレーター; 地下モデル実験; 溶解-析出; 岩石変質; 花崗岩; 高温岩体; 地熱抽出寿命計算; 反応シュミレーター; 熱水; き裂; フラクタル; スメクタイト; リニアメント; 溶解析出; 水熱ホットプレス

The simulator of water-rock interaction among multi-cracks in hot-dry rock has been developed. The possibility to predict the lifetime of heat extraction from hot-dry rock due to deformation of cracks was proposed by using flow type autoclave with temperature gradient. Besides, lithification of rock powders was investigated under static and flow conditions. Lithification easily occurred under static conditions with mechanical compression of the powders. It was confirmed by observation of the natural fractures in Hishikari-gold mine and the chronological calculation of deposited minerals that the distribution of the fractures agreed with fractal theory and the natural veins were formed by intermittent repeat of mineral deposition. Cracks artificially produced in hot-dry rock for heat extraction are predicted to be tubular in shape by water-rock interaction. A new method to produce fresh cracks for controlling heat extraction was developed by blocking the tubular cracks. Passing slurry consisting of lithium magnesium silicate through the cracks under hydrothermal conditions, resulted in solidification of smectite group clay minerals in the cracks. A sensor was developed to measure pH of solutions passing through cracks under hydrothermal conditions. The accuracy of pH measured by the sensor was confirmed by comparison with theoretical thermodynamic calculation. Discussion on dissolution-deposition process from electrochemical aspect confirmed that complex formation by reaction of metal oxides and hydroxides caused deposition and the deposit had a large effect on mechanical properties of the rock matrix.The results obtained by this research gave the method to control the multi-cracks in hot-dry rocks for practical heat extraction of generate. The facilities designed in this research are useful for many area of researches such as geochemistry, environmental science, and materials science.

开发了干热岩多裂隙水岩相互作用模拟器。提出了通过使用具有温度梯度的流动式高压釜来预测由于裂纹变形而从干热岩石中提取热量的寿命的可能性。此外，还研究了静态和流动条件下岩石粉末的岩化。在静态条件下，通过对粉末进行机械压缩，很容易发生石化。通过对菱狩金矿天然裂缝的观察和沉积矿物的年代计算证实，裂缝的分布符合分形理论，天然矿脉是矿物沉积间歇性重复形成的。通过水-岩石相互作用，在干热岩石中人工产生的用于提取热量的裂缝预计呈管状。开发了一种通过堵塞管状裂纹来产生新裂纹以控制排热的新方法。在热液条件下使由硅酸锂镁组成的浆料通过裂缝，导致裂缝中的蒙皂石族粘土矿物凝固。开发了一种传感器来测量水热条件下穿过裂缝的溶液的 pH 值。通过与理论热力学计算的比较，证实了传感器测量pH值的准确性。从电化学角度对溶解沉积过程的讨论证实，金属氧化物和氢氧化物反应形成络合物引起沉积，沉积物对岩石基体的力学性能有很大影响。本研究的结果给出了控制多金属氧化物和氢氧化物的方法。 -干热岩石中的裂缝，用于实际产生热量。本研究设计的设施可用于地球化学、环境科学和材料科学等许多研究领域。

项目成果

E.Izawa,M.Kurihara and T.Itaya: "K-Ar ages and the initial Ar isotopic ratio of adularia-quartz veins from the Hishikari gold deposit,Japan." Resource Geology Special Issue. 14. 63-69 (1993)

E.Izawa、M.Kurihara 和 T.Itaya：“日本菱狩金矿床的阿杜拉利亚石英脉的 K-Ar 年龄和初始 Ar 同位素比。”

東正治・平野伸夫・山崎仲道: "ヘクトライト水熱合成を利用した高温地熱貯留層用ゲル化剤の閉塞作用" 資源と素材. 113. 61-66 (1997)

Masaharu Higashi、Nobuo Hirano 和 Nakamichi Yamazaki：“使用锂皂石水热合成的高温地热储层胶凝剂的堵塞效应”资源和材料 113. 61-66 (1997)。

土屋 範芳: "鉱物の溶解、千田佶編「地球化学反応速度と移動現象」" コロナ社, 78-94 (1996)

Noriyoshi Tsuchiya：“矿物的溶解，“地球化学反应速率和传输现象”，由 Takashi Chida 编辑” Coronasha，78-94 (1996)

湯 衛平: "水溶液中におけるSiO_2表面でのCd (OH)_2の析出及び反応に関する研究" 日本化学会誌. 266-272 (1995)

Yu，Eihei：“水溶液中Cd(OH)_2在SiO_2表面的沉淀和反应的研究”日本化学学会学报266-272(1995)。

山崎仲道・馮旗・石田孝弘・柳沢和道・王毅・中塚勝人・鶴田孝雄: "流通条件下における岩石/熱水反応系のpH測定" 資源と素材. 111. 903-905 (1995)

Nakamichi Yamazaki、Qi Feng、Takahiro Ishida、Kazumichi Yanagisawa、Yi Wang、Katsuto Nakatsuka、Takao Tsuruta：“分布条件下岩石/热液反应系统的 pH 测量”资源与材料 111. 903-905 (1995)。