Vulnerability is controlled by the groundwater flow system and geochemical system and can be assessed with the subjective index method, statistical or process-based method and integrated method.
其主要评价方法有主观分级评价法、统计或基于过程的评价法和综合评价法三大类。
The geological and geochemical study results indicate that the metallogenetic materials came from the hydromica mudstones and shales of the Hanjiadian Group of Lower Silurian System.
地质和地球化学研究结果认为，铝土矿的成矿物质来源于下志留统韩家店群的水云母泥、页岩。
Based on analysis of auriferous and geochemical properties of the meta morphic rocks, the authors hold that the major elements related to gold mineralization were derived from the Pre-Sinian System.
在分析变质岩的含金性及地球化学性质的基础上，认为与金成矿有关的主要元素均源自前震旦系。
Through the study on the regional distribution of 41 kinds of elements in rocks from Liaoning, the author put forward a geochemical zoning system for rocks from Liaoning.
通过对辽宁区域岩石41种元素的区域分布研究，作者提出了辽宁岩石元素地球化学分区系统。
Using the theory of gray system, the authors analysed the data of oil and gas geochemical exploration, which reflect to some extent the oil and gas distribution regularity of the working district.
应用灰色系统理论，对油气地球化学勘探资料进行分析，在一定程度上反映出工作区油气分布规律。
Structures of the formations and the character of geochemistry played a crucial role in the forming of thermal field of compaction fluid system, dynamic field and geochemical field and mineralization.
建造结构和地球化学特征对压实流体系统的温度场、动力场、地球化学场和矿化作用产生决定性的影响。
In processing geochemical data, the fracture theory and background value separating method are introduced in the system.
同时在化探数据的处理上引入了分形理论及背景值分离的方法。
The system analysis of geochemical data can help information in accordance with the scale level of different mineral units including main ore-controlling factors.
化探数据系统分析可以提取与不同成矿单元尺度水平相应的信息，其中包括矿床主控因素的信息。
On the basis of the theory of petroleum system, t he geochemical mode of gas reservoir formation in Carboniferous in East Sichuan Basin was studied by applying gas reservoir geochemical methods.
本文根据含油气系统理论，采用气藏地球化学方法，研究了四川盆地东部石炭系天然气成藏的地球化学模式。
The geochemical behaviour of heavy metals in river and its effect on shallow aquiferous system of both sides of the river are studied by theoretic calculation and experiments.
通过理论计算和实际试验，研究和分析了河流中重金属元素的地球化学行为及其对两侧浅部含水系统的影响。
Quantitative study of the interactions in the system of mineral-water-micro be at the molecular level will be important for understanding low-temperature geochemical and biogeochemical processes.
矿物-水-微生物体系在分子级别上之相互作用的定量研究，对于理解低温地球化学和生物地球化学过程将是重要的。
This paper mainly introduces how to realize plottings of longitude and latitude grid line, standard map fram and type of graph in the geophysical and geochemical map by WIN-SURFER system.
本文主要介绍了如何在WIN-SURFER环境下实现物化探图件中的经纬网绘制、标准图框绘制、曲线类型图绘制方法。
The role of metamorphic fluids is an important process in the metamorphic rock fluid system. This process can be revealed effectively by a series of geological and geochemical approaches.
变质流体作用是变质岩—流体体系的重要地质作用过程，可以通过有效的地质地球化学方法揭示。
The role of metamorphic fluids is an important process in the metamorphic rock fluid system. This process can be revealed effectively by a series of geological and geochemical approaches.
变质流体作用是变质岩—流体体系的重要地质作用过程，可以通过有效的地质地球化学方法揭示。
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