Airborne geophysical survey: Bluefield 1° x 2° Quadrangle

Aeromagnetic and aeroradiometric data were collected along flight lines by instruments in an aircraft that recorded magnetic-field and radiometric values and locations. The magnetic data set presents latitude, longitude, altitude, and magnetic-field values. Geologic symbols or codes are also included. The geologic symbols were picked from surficial geologic maps. The radiometric data set presents latitude, longitude, altitude, geologic symbols or codes, apparent Uranium (Bismuth 214), Thorium (Thallium 208), and Potassium (K 40), the element ratios, and ancillary information.航空磁测数据（Aeromagnetic data）与航空放射性测量数据（aeroradiometric data）沿飞行测线由航空器搭载的仪器采集所得，该仪器可同步记录磁场参数、放射性参数及位置信息。其中，磁测数据集涵盖纬度、经度、海拔高度与磁场参数值，同时附带地质符号或编码；此类地质符号均取自地表地质图。放射性测量数据集则包含纬度、经度、海拔高度、地质符号或编码、表观铀（Bismuth 214）、钍（Thallium 208）、钾（K 40）、元素比值及辅助信息。