Borehole Gravity Measurements in the Salton Sea Scientific Drilling Project Well State 2–14

Borehole gravity measurements over a depth range from 1737 to 1027 m and the vertical gradient of gravity above ground were measured at the Salton Sea Scientific Drilling Project well State 2–14. Uncorrected borehole gravimetric densities match values from gamma‐gamma logs, indicating that the high densities seen in State 2–14 in the depth range 0.5–3 km extend for a few kilometers from the well. The aboveground gradient was found to be 4.1 µGal/m higher than expected; correcting for this value increases the gravimetric density in the borehole. Combining the borehole gravity and estimated vertical gravity gradients on the surface, we find that this densified zone coincides with much of a broad thermal anomaly that has been found to the northeast of the Salton Sea geothermal field.