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δD values of escaped H_2.from hot springs at the Tengchong Rehai geothermal area and its origin

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Chinese Science Bulletin 2002年第2期47卷 146-149页

作者： shangguan zhiguan & HUO Weiguo {2. of geology, china Seismological Bureau, beijing 10002., china {2. of geology and Geophysics, Chinese Academy of Sciences, beijing 10002., china institute of geology China Seismological Bureau Beijing 100029 China

Here we give the δD values of escaped H2.from hot springs at the Tengchong Rehai and adjacent regions, and deal with a genetic correlation between the increment H2.in escaped gases from middle-shallow reservoirs and the H2., CH4 derived from deep sources. Isotopic compositions of H2.indicate that the generation of increment H2.may be related to recent strong activity of N-W trending fault at the Rehai area. Trace monitoring the H2.release could be significant in order to keep watch on present activity of that fault.

关键词： Rehai geothermal area hydrogen stable isotopic composition.

Recent Geochemical Variation of the Hot-Spring Gases from the Tianchi Volcano, Changbai Mountains, Northeast china

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Earthquake Research in china 2007年第2期21卷 179-188页

作者： Gao Ling Wei Haiquan shangguan zhiguan Wu Chengzhi Earthquake Administration of beijing Municipality Beijing 100080 China institute of geology China Earthquake Administration Beijing 100029 China Tianchi Volcano Observatory （TVO） of Changbaishan .lilin Antu 133613 China

Recent fluid monitoring work shows that the contents of mantle-derived CO2. He and CH4 increased anomalously in 2.02.and 2.03. The ^3He/^4He ratio of the deep-fault-type Jinjiang hot springs increased highly anomalously in 2.03, and then decreased in 2.04. The ^3He/^4He ratio from the thermal-reservoir-type Changbaijulong hot springs increased slowly in 2.03, and the increase continued in 2.04. The mantle-derived He content of the He released from the Changbaijulong springs increased obviously in 2.04. The anomaly of the released gases and the isotopic He was consistent with the trends of seismic activities in the Tianchi volcanic area between 2.02.and 2.04. The abnormal release of the Jinjiang hot springs apparently decreased after the seismic activities ceased in the second half of 2.04, while the abnormal release from the Changbaljulong increased significantly after these seismic activities. It shows that the abnormal release of magmas-derived gases from the thermal-reservoir-type springs lags behind that of the deep-fault-type springs. These characteristics may be of great significance for identifying deep magmatic activity and predicting volcanic earthquakes in the future.

关键词： Changbaishan Tianchi Volcano Volcanic earthquake Gas geochemistry

Geochemical Features of the Hubin Spring Gases from the Northern Caldera Lake of the Tianchi Volcano,Changbai Mountains

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Earthquake Research in china 2011年第3期25卷 370-377页

作者： Gao Ling shangguan zhiguan Wei Haiquan Zhao Ciping Earthquake Administration of beijing Municipality Beijing 100080 China institute of geology CEA Beijing 100029 China Earthquake Administration of Yunnan Province Kunming 650224 China

This paper deals with geochemical features of gas emitted from the Hubin Springs. The Hubin Springs zone, a strong thermal emission zone, is are locatedd at the north edge of the Tianchi caldera lake. Very young deposits with uncertain eruption date are found on the top area of the Tianwenfeng, which might have been formed in one of the recent eruptions or the Millennium Eruption. It is of significance to study the geochemistry features of the emitting gas from the Hubin Springs to understand the activities of the Tianchi Volcano. This paper systematically sampled and analyzed the gases emitted from the Hubin Springs and discussed their geochemistry features. The results show that there is a high content of deep derived gases, such as CO2. He, CH4 and Ar in Hubin Springs zone. The isotopic ratio of He lies between 4. 18 and 5. 95 Ra. The averaged mantle derived gas content calculated from the ^4He/2.2.Ne ratio and He content reaches 67.1%. All these show that the Hubin Springs are located on a special belt of deep gases released in high intensity and large scale. The spatial distribution of Helium isotope is characterized by concavity, showing that this special area may be related to the volcanic edifice. It is highly possible that the released gases represent the residual gas samples of the latest eruptions from the Tianchi Volcano. However more detailed studies are demanded.

关键词： Tianchi Volcano Hubin strong gas-release zone Gas geochemistry Crater Residual gas

中国火山温泉气体地球化学特征及其在火山监测中的应用

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震灾防御技术 2018年第4期13卷 938-949页

作者：魏费翔许建东上官志冠潘波中国地震局地质研究所活动构造与火山重点实验室北京100029

中国火山温泉主要分布在吉林长白山、云南腾冲和黑龙江五大连池等火山区。这些火山虽然处于休眠状态,但大面积的温泉分布指示着岩浆房存在的可能性。本文总结了前人研究成果,分析了中国主要火山区温泉气体地球化学特征,并探讨了温泉气... 详细信息

中国火山温泉主要分布在吉林长白山、云南腾冲和黑龙江五大连池等火山区。这些火山虽然处于休眠状态,但大面积的温泉分布指示着岩浆房存在的可能性。本文总结了前人研究成果,分析了中国主要火山区温泉气体地球化学特征,并探讨了温泉气体在火山监测中的应用。长白山、腾冲和五大连池火山区温泉气体地球化学性质类似,都以CO_2.主要气体,含量在80%以上,最高可达99%以上,其它气体组分包括CH_4、N_2.O_2.SO_2.H_2.、He和H_2.。长白山火山温泉气体中氦同位素比值(~3He/~4He)最高,约为4—6R_A,CO_2.碳同位素比值(δ^(13)C)为-7.9‰—-1.3‰,CH_4中碳同位素为-48.0‰—-2..7‰;腾冲火山温泉气体氦同位素比值为3—5.5R_A,CO_2.的碳同位素为-6.49‰—-2.07‰,CH_4中碳同位素为-2..5‰—-9.3‰;五大连池火山温泉气体氦同位素比值约为3RA,CO_2.的碳同位素比值为-9.6‰—-3.1‰,CH_4中碳同位素为-47.2.—-44.4‰。3个火山区的温泉气体均显示地幔来源的岩浆气体特征,并在上升运移过程中受地壳或古俯冲物质的影响。

关键词：火山温泉地球化学同位素火山监测

唐山地区3~4 km深部地应力测量及断层稳定性分析

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地质学报 2021年第12期95卷 3915-3925页

作者：上官拴通孙东生张国斌杨跃辉齐晓飞陈东方乔永超李阿伟陈群策河北省煤田地质局第二地质队河北邢台054000 中国地质科学院地质力学研究所活动构造与地壳稳定性评价重点实验室北京100081 中国地质大学(北京) 北京100083

地应力大小和方向是干热岩开发中注采井网部署、水力压裂设计和诱发地震评估等方面的重要基础数据。本文利用非弹性应变恢复(ASR)地应力测试方法,实测获取了唐山市乐亭县马头营干热岩勘探区3~4 km深度范围的地应力状态。研究结果表明:... 详细信息

地应力大小和方向是干热岩开发中注采井网部署、水力压裂设计和诱发地震评估等方面的重要基础数据。本文利用非弹性应变恢复(ASR)地应力测试方法,实测获取了唐山市乐亭县马头营干热岩勘探区3~4 km深度范围的地应力状态。研究结果表明:①地应力量值随深度增加而加大,3139~3934 m深度范围内水平最小主应力介于59.0~90.7 MPa之间,水平最大主应力介于103.7~12..6 MPa之间。水平最大主应力方向介于N83°~114°E之间。②三向主应力总体表现为σ_(H)>σ_(v)>σ_(h),表明研究区3~4 km深度构造应力占主导地位,该应力状态有利于走滑断层活动。③利用摩尔-库伦准则对邻区断层的稳定性进行分析,结果表明研究区3~4 km深度范围内的断层总体处于稳定的应力环境。④干热岩注水开发与断层稳定性分析表明,在统一的区域地应力场作用下,研究区3900~4000 m干热岩注水开发过程中,当地面持续注入压力达到或超过约2. MPa时,可能引起场区内断层的滑动失稳,导致中小地震的发生,在干热岩开发利用中需注意防范。研究结果对于唐山地区地球动力学研究及干热岩的开发利用具有一定的参考价值。

关键词：唐山地区地应力非弹性应变恢复法断层活动性干热岩开发