Geology, geochemistry, and paleomagnetism of rocks of the Utitsa Formation, north Sikhote Alin

The results of comprehensive geological, petrochemical, and paleomagnetic study of the Cenomanian–Turonian volcanic and sedimentary rocks of the Utitsa Formation are presented. The petrochemical characteristics indicate that the volcanic rocks were formed in a volcanic arc setting with supra-subduction geochemical sources. According to petro- and paleomagnetic study of the volcanic rocks, the paleolatitude of their formation is 53.7° ± 10.8° N and the coordinates of the paleomagnetic pole are Plat = 81.6°, Plong = 208.2°, dp = 10.8, dm = 12.5°. Comparison with the Mesozoic area of the trajectory of apparent migration of the pole of stable Siberia and Eurasia points to the autochtonous position of the Utitsa Formation relative to the Late Cretaceous continental margin. The data on the magnetic structure of the sedimentary rocks of the Utitsa Formation indicate the presence of an ENE–WSW-trending (50°–70°–230°–250°) bottom paleocurrent in the sedimentation basin.