Airborne electromagnetic and magnetic survey data, East Poplar Oil Field and surrounding area, October 2014, Fort Peck Indian Reservation, Montana

Airborne electromagnetic (AEM) and magnetic survey data were collected during October 2014 in a 553-square-kilometer area that includes the East Poplar oil field on the Fort Peck Indian Reservation in northeastern Montana, USA. Data surround the town of Poplar and extend south into the Missouri River floodplain. Data were acquired with the SkyTEM301 transient electromagnetic helicopter-borne system together with a Geometrics G-822 magnetometer. The AEM average depth of investigation is about 80 m. The survey was flown at a nominal flight height of 30 m above terrain along north-south oriented flight lines; the majority of lines had a nominal spacing of 200 m with a sub-block area in the central portion of the oil field having 100 m spaced lines. East-west tie lines were flown with a nominal spacing of 8,000 m. The total survey distance is 1,332 line km. This data release includes raw and processed AEM data and spatially-constrained inverted resistivity depth sections along all flight lines. This release also includes unprocessed and processed magnetic data that has been drift corrected, leveled, and draped to terrain.

航空电磁（Airborne Electromagnetic, AEM）与磁法测量数据于2014年10月在美国蒙大拿州东北部福特佩克印第安保留地内的553平方千米区域采集完成，该区域涵盖东波普勒油田。数据覆盖范围环绕波普勒镇，向南延伸至密苏里河漫滩。本次采集使用SkyTEM301瞬变电磁直升机载系统与Geometrics G-822磁力仪完成。该航空电磁系统的平均探测深度约为80米。本次测量沿南北向测线布设，标称飞行高度为距地表30米；绝大多数测线标称间距为200米，仅油田中部子区块的测线间距为100米。东西向连接测线的标称间距为8000米。总测线长度达1332测线千米。本次数据发布涵盖所有测线的原始与预处理航空电磁数据，以及经空间约束反演的电阻率深度剖面。本次发布还包含经漂移校正、测线平差与地形拟合后的原始与预处理磁法数据。