Quaternary tectonics of recent basins in northwestern Armenia |
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| Authors: | V G Trifonov E A Shalaeva L Kh Saakyan D M Bachmanov V A Lebedev Ya I Trikhunkov A N Simakova A V Avagyan A S Tesakov P D Frolov V P Lyubin E V Belyaeva A V Latyshev D V Ozherelyev A A Kolesnichenko |
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| Institution: | 1.Geological Institute,Russian Academy of Sciences,Moscow,Russia;2.Institute of Geological Sciences,National Academy of Sciences, Republic of Armenia,Yerevan,Armenia;3.Institute of the History of Material Culture,Russian Academy of Sciences,St. Petersburg,Russia;4.Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry,Russian Academy of Sciences,Moscow,Russia;5.Institute of Physics of the Earth,Russian Academy of Sciences,Moscow,Russia;6.Institute of Archeology,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | New data on the stratigraphy, faults, and formation history of lower to middle Pleistocene rocks in Late Cenozoic basins of northwestern Armenia are presented. It has been established that the low-mountain topography created by tectonic movements and volcanic activity existed in the region by the onset of the Pleistocene. The manifestations of two geodynamic structure-forming factors became clear in Pleistocene: (i) collisional interaction of plates due to near-meridional compression and (ii) deep tectogenesis and magma formation expressed in the distribution of vertical movements and volcanism. The general uplift of the territory, which was also related to deep processes, reached 350–500 m in basins and 600–800 m in mountain ranges over the last 0.5 Ma. The early Pleistocene (~1.8 Ma) low- and medium-mountain topography has been reconstructed by subtraction of the latest deformations and uplift of the territory. Ancient human ancestry appeared at that time. |
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