Reconstruction of volcanic structures: examples from Kazakhstan and Egypt

Abstract

Abstract The existing hypotheses and paradigms about the structure of the Earth’s crust and its parts, where igneous rocks are present, do not always show facial connections of rocks and explain the reasons for their formation, as well as the genetic connection of ore deposits. These issues can be solved with the help of paleovolcanic reconstruction of the territory. This paper explains the stages of formation of paleovolcanic structre in aid for their reconstruction. Such structures represent the main units of territories with existence of igneous rocks. Examples of reconstruction of certain territories of Kazakhstan and Egypt are given. These structures are tensely related to large metallic ore deposits of Mo, Cu, Zn, Au, Ag, Ni, Co, etc. These structures have various ages of formation and degree of development. Paleovolcanic structure has many similar features to recent well-preserved structures. Our model reset on the lithostatigraphic study of contributing units around oldest complexes and their geochronological sequence, spatial distribution and pattern fault systems and dykes. These researches have not only theoretical interest for science, but also practical. Reconstruction of such structures allows to allocate the most prospective areas for search the overlapped endogenous mineralization (porphyry copper-gold, copper-sulphide, poly-metallic deposits, etc.).