摘要
在对西宁盆地进行可控源音频大地电磁测深(CSAMT)全面探测的基础上,结合以往重力、地震、大地电磁测深、直流电测深等物探资料综合解释,揭示了西宁盆地隆坳构造格局和盆地性状,据地温场分布特征探讨了热储类型,指出西宁盆地中西宁坳陷属张性、张扭性,具有地温场高、地温梯度大的特点,且热储类型具盆地传导兼断裂对流型特征;大通、平安坳陷属压性、压扭性坳陷,地温场、地温梯度相对较低,热储类型为盆地传导型。西宁断陷是地热开发有利地段。
Based on the comprehensive explanation of controllable source audio frequency geo-magnetic sounding and previous geophysical prospecting data as gravity,earthquake,geo-magnetic sounding and direct current electric sounding,the tectonic framework of uplift with depression and features of Xining basin are obtained.According to distribution character of geothermal field,the geothermal reservoir type of Xining basin is discussed.It is indicated that the Xining depression in Xining basin is extensional and transtensile fault depression,characterized by higher geothermal field and geothermal gradient,it has both geothermal reservoir of fracture convection type and basin conduction type.While Datong and Pingan depression in Xining basin are compress-shear depressions,characterized by lower geothermal field and geothermal gradient,with reservior of basin conduction type.Xining depression is a favourable exploring region for geothermal resource.
出处
《西北地震学报》
CSCD
北大核心
2011年第2期149-154,165,共7页
Northwestern Seismological Journal
关键词
西宁盆地
地球物理场
可控源音频大地电磁测深
地热地质条件
断裂对流型
盆地传导型
Xining basin
Geophysical fields
Controllable source audio frequency geo-magnetic sounding（CSAMT）
Geothermal geological condition
Fracture convection type
Basin conduction type
