West Kimberley - Prince Regent - Montague merged, WA,2011 (P1236), magnetic line data, AWAGS levelled

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose. These line dataset from the West Kimberley (Prince Regent - Montague - Charnley), WA,2011 survey were acquired in 2011 by the WA Government, and consisted of 145084 line-kilometres of data at a line spacing between 200m and 200m, and 50m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

总磁强度（Total Magnetic Intensity, TMI）数据用于量化地壳内成岩矿物组分差异所引发的地球磁场强度变化。磁异常可分为正异常（磁场强度高于正常背景）与负异常（磁场强度低于正常背景），具体取决于岩石的磁化率。该数据通过标准流程进行处理，以确保记录的响应仅源于地下岩石。处理后得到的数据集可通过解译揭示地下地质构造。经处理的数据由GA地球物理学家开展质量核验，以确保GA发布的最终数据符合使用要求。本次数据集源自2011年西澳大利亚州（Western Australia, WA）西金伯利地区（普伦蒂摄政王-蒙塔古-查恩利）的航磁测量项目，由西澳政府于2011年完成采集，总测线长度达145084测线公里，测线间距为200米至200米，地形飞行高度为50米。为压制数据中的长波长信号，项目采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——对本次航磁数据的基准水平进行校正。本航磁数据已基本校准至AWAGS基准体系。