Residual Gravity Field

The shorter wavelength component of the attributed to density Bouguer gravity field contrasts within high density basement and/or the lower density overburden. Anomalies in the residual field are usually of [...]



The degree of homogeneity in Euler's equation, interpreted physically as the fall-off rate with distance and geophysically as a structural index (SI). Values vary from 1 to 3 according to [...]



An SI unit measuring magnetic flux. 1 weber = 1 tesla-m2 = 105 gauss-m2 = 109 gamma-m2 = 109 nT-m2


Total Magnetic Intensity Anomaly

The total magnetic intensity anomaly field (TI) is the resultant field after correcting TF, the total magnetic (observed) field for a regional gradient field, such as an IGRF.


Three Dimensional (3D) Model

Networks or grids of values which model geologic surfaces represented by surfaces of density (gravity) or susceptibility (magnetics) contrast. The output of a forward model is the combined calculated gravity [...]


Tesla (T)

An SI unit measuring magnetic flux density. 1 tesla = 109 nanotesla. A cgs unit for stating the magnitude of the magnetic field vector B represented by the number of [...]



A measure of the degree to which a substance may be magnetized. It is a ratio k of the intensity of magnetization I to the causative magnetic field H. It [...]


Structural Model (2D or 2½D)

A gravity or magnetic structural model is a 2D or 2½D density and/or susceptibility model of given or assumed geology. The geology of an area can be modeled by representing [...]


Structural Index

The Euler deconvolution and Half-Slope Method techniques use first-order derivatives to determine magnetically-based depth estimations for idealized targets, such as sphere, cylinder, thin dike, contact edge.  Each of these targets [...]



Go to Top