Tectonic Types of the Pacific Abyssal Basins

Yu. M. Pushcharovsky

Geological Institute, Russian Academy of Sciences, Pyzhevskii per. 7, Moscow, 119017 Russia

e-mail: skol@ginras.ru

Received January 23, 2006

Abstract—This paper continues a series of publications on tectonics, structural evolution, and formation mech-
anism of abyssal basins. The Pacific abyssal basins of the Western thalassogen are subdivided into three types:
intermontane, interfault, and syneclise-type. The new term thalassosyneclise is proposed for the third type.
Basins of the first, second, and third types are developed in the western, northeastern, and southern Pacific,
respectively. The main mechanism responsible for the formation of basins belonging to the first two types is a
stepwise subsidence of the oceanic bottom. The formation of a thalassosyneclise abyssal basin is probably
related to energy flux of the South Pacific plume.

DOI: 10.1134/S0016852106050025

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