Abstract
Beginning in April 1979, the Los Alamos Scientific Laboratory will drill a third deep hole, EE‐2, at the Fenton Hill Hot Dry Rock site in north central New Mexico. It is anticipated that this new hole will penetrate Precambrian basement rocks to a temperature of 275°C. Based on gradients measured in the two existing deep holes, the 275°C temperature will correspond to a depth of approximately 4.43 km. During drilling, cuttings will be collected at 3‐m intervals down to the depth of 3 km (the present depth of EE‐1); from 3 km to 4.43 km, cuttings will be collected at 1.5‐m intervals. Coring attempts will be made at 150–200‐m intervals from 3 km to 4.43 km.
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