| 关于构造体系控矿的若干地球化学问题 |
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| SOME PROBLEMS ON THE GEOCHEMISTRY OF STRUCTURAL SYSTEM CONTROL OF ORE DEPOSITS |
| Structural features of different mechanical natures or different parts of the same structural feature possesses different metallogenic conditions of geochemistry. It results in different types of mineral deposits and mineralizat-ions.In other words, the different regularities governing the concentration and dispersion,migration and transformation of the ore-forming material elements are determined by their geochemical properties in different conditions of geological structures.For example, there are granitic intrusions as well as some genetically related mineral deposits formed as a result of enrichment of mobile elements or elements of rather large ionic radius at the axes of anticlines (above the neutral plane) and in the tension area of frontal arc of an epsilon-type tectonic system, which reflect the geochemical characteristics of the tectonic control of ore deposition (Fig. 8、9).As a result of synthetic study of the nature of structural planes and the related geochemical phenomena, different tectono-geochemical features may be distinguished according to the different geochemical properties of the structural features of different mechanical natures. For example, from the point of view of microscopic motion of materials, various forms of deformation of rocks and facies changes of mineral substances precipitated along the fractures under the action of stresses, are in fact manifestations of related tectono-geochemical features or phenomena.The successive procedures taken in the tectono-geochemical studies are: (1) determine the tectono-geochemical features; (2) classify the tecono-geochemical features into different tectono-geochemical types; (3) ascertain the tectono-geochemical systems; (4) study the geochemical mechanisms of structural systems control of mineral deposition. In this systematic study and analysis, the geomechanics is combined with the geochemistry, which, not only promotes the development of the tectono-geochemistry, but also further promotes the progreess of the theory of geochanics. |
| LIU Xun.1988.SOME PROBLEMS ON THE GEOCHEMISTRY OF STRUCTURAL SYSTEM CONTROL OF ORE DEPOSITS[J].Acta Geoscientica Sinica,10(1):33-47. |
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