Deep resistivity results from New York and Virginia

摘要: Surface resistivity measurements in the Adirondacks of New York show anorthosite mass to be highly resistive and homogeneous. A two-layer model with a lower layer 25,000 ohm-m fits data, but three-layer shows that layers resistivities 105 could exist at great depth. Dipole separations went out 47 km, making interpretation possible for depths several kilometers. Resistivity results from northern Virginia reflect lateral changes geology. Apparent comparable dipole vary 50 5000 over 55-km traverse.