摘要
为探明贵德盆地干热岩资源位置及分布范围,首先利用Landsat 8 TIRS(thermal infrared sensor)热红外数据,通过单窗算法和劈窗算法对贵德盆地地表温度进行遥感识别,确定了高温异常区位置;然后基于干热岩形成条件构建了包括地层、岩体、断裂、环形构造、线性构造、水热蚀变异常、地表温度异常、温泉、地热钻探、区域重力异常、区域航磁异常、电磁勘探信息等12个因子的多元信息干热岩靶区预测模型,并对贵德盆地干热岩靶区进行了预测。研究结果表明:1)贵德盆地干热岩以新近系、三叠系和第四系为保热盖层,大型北西向晚三叠世中酸性隐伏花岗岩为储热岩体,北北西向瓦里贡山深大断裂及花岗岩体为导热通道,下地幔软流圈供热和壳内部分熔融层供热为主要热源,岩石放射性产热为叠加热源;2)盆地内隐伏岩体预测区、地表温度异常区、水热蚀变异常区均具有沿北西—南东方向分布的特点,且分布位置相互印证;3)经过模型确定贵德盆地内存在一个沿北西—南东方向分布的大型干热岩带,面积约820 km^(2)。
Using Landsat 8 TIRS thermal infrared data,the surface temperature of Guide basin was identified by remote sensing through single window algorithm and split window algorithm,and the location of high temperature anomaly area was determined.Based on the formation conditions of dry hot rock,a multi information dry hot rock target prediction model including 12 factors,including strata,rock mass,faults,annular structure,linear structure,hydrothermal alteration anomaly,surface temperature anomaly,hot spring,geothermal drilling,regional gravity anomaly,regional aeromagnetic anomaly,and electromagnetic exploration information,was constructed,and the dry hot rock target in Guide basin was predicted.The results show that:1)The Neogene,Triassic and Quaternary strata are the heat preservation covers of the dry hot rocks in Guide basin,the large NW trending Late Triassic intermediate acid concealed granite is the heat storage rock mass,the NNW trending Waligong Mountain deep fault and granite body are the heat conduction channels,the lower mantle asthenosphere heating and the partially molten layer heating are the main heat sources,and the rock radioactive heat generation is the superposition heat source.2)The concealed rock mass prediction area,surface temperature anomaly area and hydrothermal alteration anomaly area in the basin all have the characteristics of distribution along the northwest southeast direction,and the distribution positions confirm each other.3)According to the model,there is a large dry hot rock belt distributed along the northwest southeast direction in guide basin,with an area of about 820 km^(2).
作者
闫佰忠
李瑶
秦光雄
于开宁
吴云霞
王亚楠
Yan Baizhong;Li Yao;Qin Guangxiong;Yu Kaining;Wu Yunxia;Wang Yanan(School of Water Resources and Environment,Hebei GEO University/Hebei Center for Ecological and Environmental Geology Research,Shijiazhuang 050031,China;Hebei Province Key Laboratory of Sustained Utilization&Development of Water Resources,Shijiazhuang 050031,China;Hebei Province Collaborative Innovation Center for Sustainable Utilization of Water Resources and Optimization of Industrial Structure,Shijiazhuang 050031,China;Qinghai Bureau of Environmental Geology Exploration,Xining 810001,China;Qinghai Provincial Key Laboratory of Environmental Geology,Xining 810001,China;School of Water Resources and Environment,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《吉林大学学报（地球科学版）》
CAS
CSCD
北大核心
2023年第4期1288-1300,共13页
Journal of Jilin University：Earth Science Edition
基金
青海省应用基础研究计划项目(2019-ZJ-7062)
国家自然科学基金项目(42002251)
河北省自然科学基金项目(D2020403022)
河北省高等学校科学技术研究项目(BJK2022007)
河北地质大学学生科技基金项目(KAY202317)。
关键词
贵德盆地
遥感识别
干热岩靶区
预测模型
Guide basin
remote sensing identification
dry hot rock target area
prediction model
