A DETAILED GRAVITY MAP OF THE NEWARK BASIN IN EASTERN PENNSYLVANIA
Over 300 new gravity readings have been taken to fill in the gaps between existing observations. These data have been corrected for compatibility and integrated into one large database. The first goal of the project is to produce a comprehensive Bouguer gravity map of the Newark basin and marginal areas. In addition, trend-surface analysis will be performed to determine the effect of deep-seated structures, while residual (or high-frequency trend-surface) analysis will help to isolate near surface features. The higher density of data will allow us to construct more detailed models of the intrusives in the basin. In addition we will be able to refine our existing structural models of the character of the western border fault and see if it changes along strike.
We will present a series of maps documenting the spatial relationship between the gravity anomalies and known surficial structures as well as models of the subsurface structure of the sills and basin margin. The long-wavelength (regional) and short-wavelength (residual) maps will be used to help highlight specific structural features.