Tectonic Structure of the Conjunction Zone of the Laptev Sea Shelf and the Siberian Plate (From the Finding of 2D CDP Reflection Seismic Studies of 2013 - 2014)

Based on 2D CDP reflection seismic studies conducted by JSC SEVMORNEFTEGEOFIZIKA in 2013 – 2014, the tectonic structure of the northwestern part of the conjunction zone of the Laptev Sea shelf and the Siberian Plate was studied. Disjunctive dislocations were revealed on time seismic sections of the Laptev Sea shelf, i.e. dip-slip faults that had led to the formation of horsts and grabens. Within the Siberian Plate, dip-slip faults, reverse faults and overthrust reverse faults were observed, forming flower structures. The conjunction zone of the Laptev Sea and Siberian plates includes the continuation of the South Taymyr fold zone with overthrust reverse faults. In the southeastern part of the area, the conjunction of the Laptev Sea and Siberian plates is represented by a series of reverse faults and a high-amplitude regional dip-slip fault. The following tectonic elements were revealed in the revised schematic tectonic map of the Laptev Sea and northwestern margin of the Siberian Plate: the Lena-Anabar marginal zone with South Taymyr High and the Kharaulakh Marginal Zone. It was assumed that the South Taymyr High and the Kharaulakh Marginal Zone are divided by a regional oblique-slip fault on the continuation of the Khatanga-Lomonosov transform fault