Magnetic Data

Magnetic data as well as gravity data were used as part of the targeting strategy for low-temperature geothermal resources. The late Alleghanian, unmetamorphosed, granites produce a magnetic high as well as a gravity low. This combination of geophysical anomalies generally ensured a relatively high heat flow within sediments of the Atlantic Coastal Plain that blanketed and concealed the basement granites producing the anomalies. Such granites associated with a relatively higher geothermal resource potential were clearly identified on a magnetic map,when used in combination with gravity data.