盆地成矿流体系统研究中的几个重要问题  

SOME IMPORTANT PROBLEMS ON THE STUDY OF BASIN METALLOGENIC FLUID SYSTEMS

作　　者：程小久[1] 匡耀求[1] 

机构地区：[1]中国科学院广州地球化学研究所

出　　处：《华南理工大学学报（自然科学版）》1996年第S1期87-91,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金

摘　　要：提出了盆地成矿流体系统的概念，将其定义为：某一地质时期，在沉积盆地内部，受动力驱动的流体从发生、发展到终止的整个演化过程中，流体流场、温度场和地球化学场构成的整体。并根据流体运动的驱动力将其划分为压实、重力和热动力流体系统。论述了三类流体系统的流场和温度场基本特征。在建立盆地二维地质模型基础上，利用Ｂｅｔｈｋｅ（１９８５）推导的描述压实流体的流动方程、热传导方程和介质连续方程，采用有限差分法求解粤北盆地中泥盆世至早石炭世压实流体流场和温度场。从流体散聚规律探讨了区域成矿规律和矿床成因。This paper defines the basinal metallogenic fluid systems as a complexity of flow field, thermal field and geochemical field of the fluid during the evolution of the dynamically driven fluid within a sedimentary basin, which can be classified into compactional, gravitational and thermodynamic subsystems according to the forces driving the movement of the fluid. The flow field and thermal field of three kinds of fluid systems are characterized. Based on the two dimensional geological model and three equations derived by Bethke(1985) describing medium continuity, fluid flow and heat transfer. The flow and thermal fields of compacting fluid system within Yuebei sedimentary basin from Middle Devonian to Early Carboniferous Epoch were studied with stress on the discussion of the numerical simulation result. Finally, some research methods are discussed in this paper.

关 键 词：地质流体 沉积盆地 成矿流体系统 数值模拟 

分 类 号：P61[天文地球—矿床学]