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.

已经开发了热干岩石中多裂缝之间的水摇滚相互作用的模拟器。通过将流量类型的高压釜与温度梯度使用，提出了由于裂纹变形而预测从热干岩石中提取热岩石的寿命的可能性。此外，在静态和流动条件下研究了岩石粉末的晶状化。晶状化很容易在静态条件下进行粉末的机械压缩。通过观察到hishikari-gold矿中的自然断裂以及沉积矿物的时间顺序计算证实，这证实了这一点，即与分形理论一致的裂缝的分布和天然静脉是通过矿物沉积的间歇重复形成的。在热干岩石中人为产生的用于热萃取的裂纹预计将通过水摇滚相互作用为管状。通过阻塞管状裂缝，开发了一种新的方法来控制热萃取的新裂纹。在水热条件下，通过硅酸锂组成的浆液通过裂缝，导致裂纹中蒙脱石基团粘土矿物的凝固。开发了一个传感器，以测量在水热条件下通过裂纹的溶液的pH值。通过与理论热力学计算相比，通过传感器测量的pH的准确性得到了证实。讨论从电化学方面的溶解沉积过程证实，金属氧化物和氢氧化物的反应形成的复杂形成引起沉积，沉积物对岩石基质的机械性能产生了很大的影响。这项研究获得的结果提供了控制在热型岩石中多裂岩的方法，以实用生成的热量。这项研究设计的设施对于许多研究领域都有用，例如地球化学，环境科学和材料科学。

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)。