摘要
沉积盆地是流体活动最活跃的场所,而地层渗透率则是盆地流体运移的基础数据.沉积盆地中的热-重力驱动型流体的运移依赖于盆地的水文地质特征和成矿流体特征.为研究地层渗透率的改变对湖南锡矿山锑矿床成矿流体热场和流场的影响,首先选取一个对比地层渗透率组,计算出区域的热场和流场分布,然后改变导水地层渗透率的大小,并将其计算结果与对比渗透率组的热场结果进行对比,结果显示改变地层渗透率的大小对区域流场的影响较大,而对区域热场的影响则不大.在所讨论的地层渗透率组取值范围内,地层渗透率的改变对区域热场的影响介于5%～10%间,而地层渗透率的改变对区域流场的影响则达到2～3倍.
Sedimentary basins are the places for fluid activities whose moving conditions is characterized by permeability. The fluids driven by heat and gravity depend on the geohydrologic conditions and the characteristics of ore-forming fluids in sedimentary basins. In order to study the effects of permeability variations on both fluid fields and thermal ones, this paper takes advantage of a series of permeabilities to calculate the distribution patterns of regional fluid and thermal fields. Different simulation results are obtained by changing the permeability parameters in strata. It can be concluded that the permeability affects fluid fields more than thermal ones. With the variations of permeabilities, the thermal field just varies from 5% to 10%, whereas the influence of the fluid field may exceed 2 or 3 times.
出处
《地质科技情报》
CAS
CSCD
北大核心
2005年第3期80-84,共5页
Geological Science and Technology Information
基金
973项目(G1999043210)
国家自然科学基金资助项目(40073007
40272080)
关键词
成矿流体
数值模拟
地层渗透率
锡矿山锑矿床
ore-forming fluid
simulation
permeability
Xikuangshan antimony deposit
作者简介
杨瑞琰（1964-），男，副教授，主要从事流体地球化学的计算与模拟研究。
