理论自由空间重力异常处理在承德高原地区应用效果分析  

Analysis of the effect of theoretical free-space gravity anomaly treatment applied in the Chengde plateau region

作　　者：杨明[1,2] 孟凡兴 张文峰[1,2] 杨金政 YANG Ming;MENG Fanxing;ZHANG Wenfeng;YANG Jinzheng(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,Hebei,China;China Nuclear Emergency Aviation Monitoring Engineering Technology Research Center,Shijiazhuang 050002,Hebei,China)

机构地区：[1]核工业航测遥感中心,河北石家庄050002 [2]中核核应急航空监测工程技术研究中心,河北石家庄050002

出　　处：《矿产勘查》2024年第3期443-448,共6页Mineral Exploration

基　　金：国家基金项目“京津石地热资源调查”(IHEGDD2018077)资助。

摘　　要：布格重力校正方法中存在正常场校正的高程起算面误差、高程校正误差与地形和中间层校正误差,为避免传统布格重力校正方法中存在的误差影响,提高资料解释的准确性,本文采用了理论自由空间重力异常处理技术,对在承德御道口波状高原区的实测重力资料重新进行了处理。通过与布格重力异常的对比分析,对该方法进行了评价。研究结果表明,在波状高原地区,理论自由空间重力异常相较于布格重力异常能够较好地反映区域重力场的空间分布形态,对局部信息的展现也更加清晰、丰富,对构造形态表现更加合理、准确,根据不同的地质目的,合理选择布格校正和理论自由空间重力异常处理,可提升资料解释的可靠性。In Bouguer gravity correction method,there are elevation starting surface errors,elevation correction errors and terrain and intermediate layer correction errors in normal field correction.In order to avoid the influence of errors in traditional Bouguer gravity correction method and improve the accuracy of data interpretation,this paper adopts theoretical free space gravity anomaly processing technology.The measured gravity data in the undulating plateau area of the Imperial Gateway in Chengde are re-processed.The method is evaluated by comparing with Bouguer gravity anomaly.The results show that compared with Bouguer gravity anomaly,the theoretical free space gravity anomaly can better reflect the spatial distribution pattern of the regional gravity field in the wavy plateau region,and the local information is more clear and rich,and the structural morphology is more reasonable and accurate.According to different geological purposes,Bouguer correction and theoretical free space gravity anomaly processing should be reasonably selected.This improves the reliability of data interpretation.

关 键 词：理论自由空间重力异常 布格重力异常 波状高原 重力校正 承德御道口地区 

分 类 号：P312.1[天文地球—固体地球物理学]