ПРОБЛЕМЫ РУДНОЙ ГЕОЛОГИИ И ЧЕЛОВЕЧЕСКИЙ ФАКТОР. ЧАСТЬ 3. МЕТАМОРФИЗМ И МЕЗОТЕРМАЛЬНОЕ РУДООБРАЗОВАНИЕ

Abstract

The relevance of the research. The conditions of the known large mesothermal gold deposits formation into black shales states of different age form the subject of animated discussion which often acquires the signs of substitute and probably therefore the endless one as a result of exception by concrete author or author’s group of the facts important for the problem solution but which do not fit in database of developing by him/them ideas, from the consideration, discussion, generalization. The main aim of the research. To obtain the correct results required for deepening the hydrothermal ore formation theory and developing, improving the effective forecast-search criteria of the deposits it is necessary to remove this negative manifestation of the human factor \xa0and return the discussion in normal course by means of including in scientific expression the «handy» and «non handy» facts in reconstruction of ore formation. The methods of the research. The author has analyzed the database proposed long ago and recently for substantiation of the metamorphic-hydrothermal and others hypotheses of mesothermal gold deposits formation into black shales strates. The paper introduces the author’s materials, including the analytic data – the results of the full chemical silicate analysis (wet) of rocks, atomic-absorption analysis of the content of gold, silver, mercury into rocks, petrochemic balance calculations of the between-zoning migration of chemical elements into near-ore metasomatic haloes, mathematical computing of the analyses results (content oregenous elements). The results of the research. The author made the conclusion on geology-genetic uniformity of mesothermal gold deposits formed into crystalline substratum and black shales. The following facts: 1) control of gold deposits by deep faults; 2) similar geologic age of early plutons, massifs of palingenetic granitoids with large accompanying dikes of average-soured rocks and late dikes of the moderately-alkaline dolerites, dolerites, leucodolerites of tillore, insideore, afterore generations, including transformed into hightemperature biotite-amphibole hornblende metasomatites of insideore dikes-fluidconductors, and ores; 3) authentic mineral-petrochemic zoning of the near-ore metasomatic haloes in both substratum, formed in conditions of potassium-sulphurously-carbon-dioxidic metasomatism of propilite-beresitic type with entrance into haloes of potassium, restoring sulphur, carbon dioxide, removal of sodium and partly silicium; 4) inheritance by the nearore metasomatites of the petrochemic type insidedoleritic metasomatism and contrasting anomalies of the femic (Mg, Fe, P, Ti) elements; 5) isotopic relations of sulphides sulphur and carbonates carbon of ores and nearore metasomatites meeting the meteoritic standard (the mantle), prove the conclusion. The enumerated facts eliminate the participation of metamorphism in ore formation. In Lensk region, as well as in others goldore regions of mountain-folded Siberian craton frame, mesothermal gold deposits are formed into antidromic granite-diorite-dolerite fluid-ore-magmatic complexes composition at late basic stage of their function, and insideore dikes-fluid conductors of moderately-alkaline dolerites are the link between basic hearthes of mantle – the sources of gold-bearing solutions, and deposits in the crust. Paper structure. The 3rd part of the paper has the following sections: subject of the problems and the formulation of the task; mineral-petrochemic zoning of the nearore propilitic-beresitic type metasomatic haloes in mesothermal gold deposits formed into crystalline substratum and black shales series; mineral-petrochemic zoning of the gold deposit Sukhoi Log nearore metasomatic haloe. In the 4th part of the paper there are the following sections: the distribution of oregenous elements into nearore expanse of the mesothermal gold deposits formed into crystalline substratum and black shales series; the discussion of the results, conclusion and references.