中国地下热水分布之特点及属性  

THE DISTRIBUTIVE CHARACTERISTICSOF GEOTHERMALWATER AND ITS NATURE IN CHINA

作　　者：陈墨香[1] 邓孝[1] 

机构地区：[1]中国科学院地质研究所

出　　处：《第四纪研究》1996年第2期131-138,共8页Quaternary Sciences

摘　　要：本文依据我国近年来地下热水资源调研和勘探的新进展及其与有关的研究结果，简述我国地下热水形成和赋存的地热地质背景，分析和归纳构造隆起区中的温泉和中、新生代沉积盆地中的地下热水分布之基本特点，讨论主要水热带的地热学属性和沉积盆地热水的形成机制，为我国地热资源的勘探、开发和今后地球科学有关问题的深化研究提供参考。The main conclusions are as follows:(1) Terrestrial heat flow data-set from continential area of China has been analysed. Statistical data show that heat (q) varies in a broad range (30-320mW/m2),but mostly concentrated in 40-85 mW /m2, the average value being 63±16 mW /m2This is consistent with the recent statistical analysis of the global data-set from continents. Generally, heat flow pattern in China is characterized by 'high in SW (70±23mW/m2) and SE (66±15mW/m2)',' low in NW (43±8mW/m2) and NE (59±13 mW /m2)', but' transition area in central part (the Sichuan and Ordos Basins,52±12 mW /m2)'. This is resulted from the geological evolution of China sinceCenozoic with strong influence and effects by the Indian plate from the SW and thePacifie and Philippine Sea plates from the SE.(2) In total, there are 2200 hot springs in China, among which 859 are in thetemperature interval 25-40℃, 807 are in 40-60℃, 398 are in 60-80℃and 136 higher than 80℃. Zonation of the hydrothermal activities is. obviousin China. They can be classified into four major belts as far as hydrothermal areasare concerned. These four belts are as follows: south Tibet (Xizangl-west Sichuan-westYunnan, Taiwan, coastal SE China and Shandong-Liaoning. The former two are hightemperature geothermal belts (>150℃), i. e. Himalayan geothermal belt and Taiwangeothermal belt. The latter two are low-medium temperature geothermal belts(<150℃). The Himalayan geothermal belt is an importand part of the Mediterraneangeothermal belt, which is of continent-continent collision type. The Taiwangeothermal belt is a part of the Circum-Pacific geothermal belt, but it didn. t has atypical characteristics of this belt.(3) South Tibet-west Yunnan and central Taiwan are located on the plate boundaries and their adjacent areas are, tectonically, the most active regions in the world.Both regions are characterized by high heat flow anomaly (85 -- 120InW/mz) andhave the common geological-geophysical conditions necessary for nurturing hightemperature geother

关 键 词：地热 地下热水 分布 属性 地热流 

分 类 号：P314.2[天文地球—固体地球物理学]