Thermodynamic Inversion by Vladimir N. Kompanichenko

Author:Vladimir N. Kompanichenko
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

Reconstruction of the Gorevskoye deposit formation, as well as many other similar deposits, implies migration of hot solution to the surface through the spacious network of cracks, with the continuous precipitation of minerals. This is a successive process that often proceeds in fluctuating, or pulsing, regime. As an example, the scheme of the cracks network enlargement in Olkhovskoye gold deposit is shown on Fig. 5.2. The three network’s branches successively grew up from the root area, with the following transformation of open cracks into quartz veins. Availability of multilevel fluctuations in past hydrothermal systems are verified by plenty facts, including existence of polygeneration veins and zoning minerals; any change of precipitating mineral associations corresponds with change of fluid parameters. Besides, from time to time cracks can become closed or/and open because of active tectonic processes. In particularly, exploration of the quartz veins network in Andreevskoye gold deposit (central Siberia) revealed some linear zones with reduced thickness of veins that trace through the whole network (Fig. 5.3). Such squeeze zones might periodically block free migration of hot solution through cracks that maintained oscillating regime of hydrothermal process.

Fig. 5.2Scheme (vertical section) of the ore quartz veins branching in Olkhovskoye gold deposit (central Siberia) (Ivankin 1973). 1 Pricontactovaya ore branch; 2 Centralnaya ore branch; 3 Osnovnaya ore branch; 4 junctions of ore flows branching. I–III Vertical horizons: I surface, II intermediate zone, III root zone

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