Airborne magnetic and radiometric survey, west central Utah, 2023-2024

This data release provides digital flight-line and gridded data for a high-resolution airborne magnetic and radiometric survey over a part of west central Utah. The survey was acquired as part of the UGSS Earth Mapping Resource Initiative (Earth MRI) to improve our understanding of the fundamental geologic framework of the region with applications to evaluating natural resources and geologic hazards. The survey traverses a region of west central Utah that includes Toole, Utah, Juab, Millard, Beaver, Sevier, Piute, and Iron counties. The survey area hosts multiple known and potential mineralizing systems including Basin brine path, Carlin-type, Climax-type, Lacustrine evaporite, Marine chemocline, Meteoric convection, and Porphyry Cu-Mo-Au. The potential critical mineral commodities include antimony, arsenic, beryllium, bismuth, fluorspar, indium, lithium, magnesium, manganese, PGE, potash, rhenium, scandium, tellurium, tungsten, uranium, vanadium, and zinc. Data for this survey were acquired and processed by New Sense Geophysics Ltd (NSGL) under contract to Merrick-Surdex Joint Venture and the USGS. The survey was flown from August 2023 to October 2024 with a combination of fixed wing airplanes and helicopters, with helicopter coverage over areas with more mountainous topography. Pre-planned flight lines were flown in an E-W direction with 200-m line spacing; N-S tie-lines were flown with 2000-m line spacing. The nominal flight height of 100 meters (m) above ground, with areas having higher population densities flown at a nominal height of 330 m above ground for safety reasons. A total of approximately 144,600 linear kilometers of data were collected covering a bounding box area of 200-km E-W by 275 km N-S. Following acquisition, NSGL also performed extensive post-processing of the data and delivered the final databases, grids, and images. Details regarding the flights and data processing are described in the contractor report provided in this release

本数据集发布提供了犹他州中西部部分区域高分辨率航空磁测与航空放射性测量的数字化测线数据及网格化数据。本次航空测量作为UGSS地球测绘资源倡议（Earth Mapping Resource Initiative, Earth MRI）的组成部分实施，旨在深化对该区域基础地质框架的认知，相关成果可应用于自然资源评价与地质灾害风险评估。
本次测量覆盖犹他州中西部区域，涵盖图埃勒县（Toole）、犹他县（Utah）、朱厄布县（Juab）、米勒德县（Millard）、比弗县（Beaver）、塞维尔县（Sevier）、皮尤特县（Piute）与艾恩县（Iron）。该区域内发育多处已知与潜在成矿系统，包括盆地卤水通道型、卡林型、克莱麦克斯型、湖相蒸发岩型、海洋化学跃层型、大气对流循环型以及斑岩型铜-钼-金成矿系统。区域内潜在的关键矿产资源包括锑、砷、铍、铋、萤石、铟、锂、镁、锰、铂族元素（Platinum Group Elements, PGE）、钾盐、铼、钪、碲、钨、铀、钒与锌。
本次测量的数据由新森斯地球物理有限公司（New Sense Geophysics Ltd, NSGL）受梅里克-瑟德克斯合资企业与美国地质调查局（United States Geological Survey, USGS）委托采集并处理。测量作业于2023年8月至2024年10月间开展，采用固定翼飞机与直升机联合作业模式，其中直升机用于地形更为复杂的山区区域。预设测线沿东西向布设，线间距为200米；南北向联络测线的线间距为2000米。本次测量的标称飞行高度为距地面100米，针对人口密度较高的区域，出于安全考虑将标称飞行高度调整为330米。本次采集的总线性数据长度约为144600千米，作业覆盖范围为东西向200千米、南北向275千米的矩形区域。数据采集完成后，NSGL还对数据开展了全面的后处理工作，并交付了最终的数据库、网格化数据与影像成果。本发布包中附带的承包商报告详细说明了本次航空作业与数据处理的相关细节。