Clarence-Moreton (Chinchilla), QLD, 1986 (P517), 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 Clarence-Moreton (Chinchilla), QLD, 1986 survey were acquired in 1986 by the QLD Government, and consisted of 14192 line-kilometres of data at 1500m line spacing and 150m 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）数据用于衡量由地壳中成岩矿物含量差异所引发的地球磁场强度变化。磁异常可分为正异常（磁场强度高于正常水平）与负异常（磁场强度低于正常水平），其类型取决于岩石的磁化率。该数据集通过标准流程进行处理，以确保所记录的磁场响应仅源自地下岩石。经处理得到的数据集可通过地质解译揭示地下地质结构。经处理后的数据由GA地球物理学家开展质量核验，以确保GA发布的最终数据满足应用需求。本次1986年昆士兰州克莱伦斯-莫顿（钦奇拉）地区航空磁测的测线数据集，由昆士兰州政府于1986年采集完成，总测线长度达14192千米，测线间距为1500米，地形净空高度为150米。为压制数据中的长波长分量，本次测线数据采用独立数据集——全澳航空地球物理调查（Australia-wide Airborne Geophysical Survey, AWAGS）航空磁测数据——进行基准面校正。本次航空磁测数据已基本按AWAGS基准完成平差校正。