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科技导报  2015 

山东省陈庄潜凸起区地温场特征与泰山岩群放射性元素生热率探讨

DOI: 10.3981/j.issn.1000-7857.2015.19.009, PP. 58-61

Keywords: 陈庄潜凸起,地温场,泰山岩群,放射性生热率

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Abstract:

自然界的岩石中存在着放射性元素,这些元素在衰变过程中会释放出热能,放射性生热是岩石圈内热的主要来源之一。山东省陈庄潜凸起区作为一个干热岩勘探研究区域,在干热岩调查研究方面取得了一些基础性资料。本文对该区大地热流及地温场进行分析的基础上,利用Rybach生热率公式计算了钻孔岩石的放射性生热率,从GRY1孔的生热率与深度的关系来看,1650m以上,生热率整体数值较大,且变幅较大,在埋深1430~1645m生热率达到4.72~6.78μW/m3,该区间主要由含黑云母二长花岗岩及绿泥石化二长花岗岩组成。1645~2500m区间主要由花岗岩及含黑云母闪长岩、辉长岩组成,生热率有所降低。整体来说,花岗岩中生热率变化较小,一般在2.0~2.5μW/m3;而含黑云母二长花岗岩及弱绿泥石化二长花岗岩生热率较高,且变化较大。

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