四川牟尼沟水体的同位素地球化学特征  

Isotopic Geochemical Characteristics of Water Bodies in Munigou, Sichuan Province

作　　者：李宏业[1] 尹观[1] 杨俊义 范晓 

机构地区：[1]成都理工大学应用核技术与自动化工程学院四川省地学核技术重点实验室,四川成都610059 [2]四川省区域地质调查队,四川成都610213

出　　处：《地球学报》2003年第6期529-534,共6页Acta Geoscientica Sinica

基　　金：四川省黄龙国家风景名胜管理局研究项目资助

摘　　要：牟尼沟位于四川省北部阿坝州松潘县 ,青藏高原东隅 ,系黄龙 九寨沟国家风景名胜区的一部分。文中运用同位素地球化学的方法 ,对牟尼沟各水体中的δD、δ18O、T值、氘过量参数 (d)和元素化学分析数据进行研究 ,初步查明牟尼沟内大气降水、地表水、地下水以及主要泉水之间的循环和补、径、排关系。珍珠泉和翡翠泉为沟内出露的主要泉水 ;其中二道海沟珍珠泉系地下深循环热水的露头 ,是大气降水通过补给区弱透水覆盖层中的断裂或裂隙下渗 ,通过深大断裂循环至地下深部 ,与深部热流进行热交换后 ,返回地表出露 ,其作为天然温泉开发具有较大的潜力 ;矿泉水厂沟的翡翠泉是典型的酸性岩溶冷泉 ,含水层水的径流较珍珠泉慢 ,且滞留时间相对长些 ,含有一定的CO2 ,系一深部含水层地下水的露头 ,它源自全区补给高度最高的大气降水。泉水流量大且稳定 ,水质好 ,作为矿泉饮用水开发具有重要的经济价值 ;沟内大多数地表径流来源于大气降水和浅层地下水补给 ,丰水期以大气降水为主 ,枯水期浅层地下水补入到地表径流中的比例相对增加。这种对地表径流的调节作用 ,对于保持风景区内的景观具有重要作用。同时对于评估珍珠泉。Munigou is a part of the Huanglong-Jiuzhaigou national scenic spot in northern Sichuan Province. Based on analyzing the data of δD,δ 18O,tritium contents, deuterium excess parameters (d-excess) and element chemical compostion by the isotope geochemical technique of natural water, the authors discuss the recharge, runoff, discharge and the hydraulic relationship between the precipitation, terrain surface water, groundwater and main springs in Munigou area. The Pearl Spring and the Jadeite Spring are major spring resources in this spot. The Pearl spring is a hot spring recharged by the precipitation derived from an elevation of over 3 700 m. A part of precipitation infiltrates underground and returns to the earth's surface after it exchanges quantities of heat with deep hot fluids. The Pearl spring can therefore be exploited as a hot spring. The Jadeite spring is a typical acidic karst water cold spring. The velocity of water flow in the aquifer of the Jadeite spring is slower than that of the Pearl spring and the water has longer detained time. The spring water has a good quality and an important economic value as natural mineral water. The runoff in Munigou is mostly recharged by precipitation and shallow groundwater. This recharge shows seasonal variation and plays an important role in maintaining the landscape of the scenic spot. The problems discussed in this paper have far-reaching significance in the evaluation of the exploitation potential of the Pearl Spring and the Jadeite Spring and also in the protection and sustainable development of the precious natural resources in Munigou area.

关 键 词：水循环系统 同位素 氘过量参数(d) 地球化学特征 牟尼沟 

分 类 号：P641.3[天文地球—地质矿产勘探]