| 地热田高地温异常成因机理及温度分布特征 |
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| 关键词:geothermal dessert heat conduction tectonic movement new energy magma pocket |
| 基金项目:国家自然科学基金面上项目(编号: 41572314);中国地质调查局地质调查项目“南方页岩气资源潜力评价”(编号: 20160181) |
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| 摘要: |
| Genetic Mechanism and Distribution Characteristics of High Temperature Anomaly in Geothermal Field |
| There are different opinions concerning the formation of geothermal field high temperature in geothermal research and the problem as to why there is a low temperature gradient in the deep part of the geothermal field. In this paper, the authors analyzed the influencing factors of geothermal field proposed by previous researchers, and adopted geothermal field forward modeling method to study two situations, i.e., anomalous heat sources heating magma pocket and heat transfer without heat source. The authors hold that the majority of anomalous heat sources such as magma pocket have a fast cooling rate and can’t directly heat the geothermal field relative to the geological evolution time scale. The search for geothermal field should be mainly conducted in a good thermal cap with a certain thickness in the shallow part and the high conductive layer in the deep part. The main controlling factor for high geothermal field is the lateral heterogeneity in physical-thermal conductivity caused by tectonic movement. In geothermal field, the temperature reflects mirror image with depth in the vertical direction, i.e., geothermal gradient decreases sharply from shallow part to the deep part until “high conductive homogenization depth”. The temperature measurements in lots of geothermal fields show the correctness of this conclusion. |
| MAO Xiao-ping.2018.Genetic Mechanism and Distribution Characteristics of High Temperature Anomaly in Geothermal Field[J].Acta Geoscientica Sinica,39(2):216-224. |
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