THE STRUCTURE OF THE EARTH'S CRUST IN THE TRANSITIONAL AREA BETWEEN THE ASIAN CONTINENT AND THE PACIFIC OCEAN

Geophysical investigation in the Sea of Okhotsk, the Kuril-Kamchatka area, and the adjacent parts of the Pacific Ocean have been made to determine the crustal structure in the transitional zone between the Asian continent and Pacific Ocean. Seismic and gravimetric work show the MohoroviCiC surface at about 10 km on the oceanic side and gradual deepening toward the continent with a gentle gradient into the sea of Okhotsk. The first approximation of the Bouguer gravity anomaly relation is H_km = 35 (1?th 0.0037 Δg), H_km being the crustal thickness and Δg the Bouguer anomaly.--C. E. Sears.