An isostatic residual gravity map of california: a residual map for interpretation of anomalies from intracrustal sources

Comparison between crustal density and velocity variations in southern California

“…In particular, longwavelength anomalies entirely caused by lateral variations in crustal density will be eliminated by these techniques. Even though base levels may change, short-wavelength residual anomalies (<100 kin) produced by upper-crustal sources tend to be little changed by the use of different isostatic models in California [dachens and Griscom, 1985] To quantify differences between the predicted and isostatic residual gravity, we subtracted the predicted gravity from the isostatic residual gravity. To determine the residual difference map, this difference was then upward continued 5 km to enhance the longer-wavelength differences that would be caused by sources in the middle and lower crust (Fig.…”

Mineral Resources of the Mount Nutt Wilderness Study Area, Mohave County, Arizona

“…To isolate that part of the gravity field that arises from near-surface density distributions, an isostatic residual gravity map was constructed from the Bouguer gravity data. The method used was removal of a regional gravity field computed from a model of the crust-mantle interface that assumes Airy-type isostatic compensation (Jachens and Griscom, 1985).…”

Mineral Resources of the Warm Springs Wilderness Study Area, Mohave County, Arizona

“…To isolate that part of the gravity field that arises from near-surface density distributions, an isostatic residual gravity map was constructed from the Bouguer gravity data by removing a regional gravity field computed from a model of the crustmantle interface assuming Airy-type isostatic compensation (Jachens and Griscom, 1985).…”