Original paper

Differentiation of morphotectonic blocks on Kamchatka Cape Peninsula, Russia, based on analysis of marine terraces

Pflanz, Dorthe; Freitag, Ralf; Tsukanov, Nikolay; Baranov, Boris


The Kamchatka subduction zone is one of the most active convergent margins in the world. Convergence of the Pacific Plate (with the onriding Emperor Seamont Chain) against the Eurasian margin is orthogonal and rates reaches up to 7.9 cm/a. Subduction in front of the Kamchatka Cape peninsula causes a rapid exhumation of the area and different tectonic-morphological blocks can be distinguished. Existing apatite fission track data show differential mean exhumation rates comprising 0.18+- 0.04 mm yr-l in the north up to 1.2 +-0.18 mm yr-l in the south of the peninsula. In addition to the exhumation, the differential uplift rates of the blocks can be characterized by mapping and dating distinct levels of marine terraces. This study aims to introduce preliminary results for discrimination of different morphotectonic blocks of Kamchatka Cape peninsula by using different methods of remote sensing analyses (Quick Bird and Landsat, aerial photographs, ASTER DEM, SRTM), geomorphological interpretation and age dating (thermochronology, optical stimulated luminescence OSL and terrestrial cosmogenic nuclides TCN).