天然源面波法在膨润土矿勘查中的应用  

Application of natural source surface wave method in bentonite mineral exploration

作　　者：白烨 邱庆良 曹乃文 BAI Ye;QIU Qingliang;CAO Naiwen(Jilin Geophysical Prospecting and Surveying Team,Changchun 130033,China)

机构地区：[1]吉林省煤田地质局物测队,长春130033

出　　处：《世界地质》2022年第2期283-290,共8页World Geology

基　　金：吉林省煤田地质局地勘专项资金(吉财预[2020]1号)。

摘　　要：利用天然源面波法,对吉林省长岭县金山屯膨润土矿(200 m以浅)进行勘探,该方法具有无需外部源提供信号,能够利用采集的频率域信息反演获得精确地层速度两个特点,因此在矿体与围岩具有速度差异时能够有效追踪。综合勘查区采集的频散曲线形态特征、地层的面波及横波速度,对矿体空间展布特征进行推断,认为勘查区西南部地层面波速度横向稳定区域为有利成矿带,识别结果与钻孔信息对比证明了该种方法的准确性、可靠性和经济性。The exploration has been carried out for shallow bentonite ore of 200 m by natural source surface wave method in Changling County,Jilin.This method has two characteristics.One is the source isn t required to provide the signal,and the other is obtained accurate formation velocity by inversion of the collected frequency domain information.Therefore,it can be effectively tracked when the velocity difference between ore body and surrounding rock.The spatial distribution characteristics of ore bodies are inferred by morphological characteristics of dispersion curve and the formation of surface and shear wave velocities.It is considered that the laterally stable region of stratospheric wave velocity in the southwest of the exploration area is a favorable metallogenic belt.The accuracy,reliability and economy of this method are proved by comparing the identification results with drilling information proved.

关 键 词：天然源面波 膨润土 非金属矿 浅层勘探 频散曲线 

分 类 号：P619.2[天文地球—矿床学]