RELATIONSHIP OF EPI-HERCINIAN AND LATE CENOZOIC STRUCTURAL PLANS OF THE WESTERN PART OF GORNY ALTAI


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Авторы: Deyev Eugeny     Zinoviev Sergei     Chikov Boris     Novikov Igor     Frolova Tatyana    
дата публикации: 2004
реферат:
Development of Gorny Altai is characterized by a set of independent stages of orogeny, which successively transformed structural plans of various ages.Non-uniformity in epi-Hercynian regional structure, formed during Caledonian, Hercynian and Late Permian - Triassic deformational stages, was distinguished. Mosaic-block terranes and collision systems are the main types of these structures. The first ones are relatively integral blocks of Caledonian-Hercynian substrate, the second ones are the zones of intensive transformation of the above substrate. Terranes act as dampers providing virgation of separated collision systems. Collision systems are characterized by general NW stretch, relatively ordered structure, and their plane configuration becomes more complicated from the SW to the NE. In turn, mosaic-block terranes include block structures and inter-block zones, and collision systems include sutures, collision-folded zones and relic blocks of pre-collision substrate.The configuration of morphotectonic areals, compared with mosaic-block terranes within Late Cenozoic structural plan, changes significantly. The largest Biya-Katun one combines the territories of Upper-Katun, Biya and some part of Charysh-Kaksa terranes, fragments of Biryusa-Chuya, Biya-Katun and Anuy collision systems. Its inner structure is complicated by differently oriented belt-block systems separating areal into some single areal-block systems. Besides, in the south-west of this territory the fragments of Rudny-Altai and Koksa (northwards) morphotectonic areals are distinguished. They partially or completely inherit location of corresponding epi-Hercynian structural elements. Following development of interblock zones led to disintegration of Cherga terrane into separate "massifs". The distinctive feature of Late Cenozoic morphotectonic belts, which partially or completely inherited by epi-Hercynian collision systems, is anisotropy of elements of the inner structure. On the background of this anisotropy, separate relic "massifs" combining isometrical blocks are distinguished. In a vicinity development of Irtysh and Bukhtarma morphotectonic belts continue. Anuy-Biya belt completely inherits in its structure the most part the spread area of Anuy and fragments of Biryuksa-Chuya and Biya-Katun collision systems. It is necessary to note that Biryuksa-Chuya collision system "degenerates"" completely.
первоисточник: 32nd International Geological Congress, Florence, Italy, August 20-28, 2004: Abstracts Volume
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страницы: 934
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