Anomaly Geochemical Fields in Siberian Hydrothermal Gold Deposits

18th International Scientific Symposium in Honour of Academician M. A. Usov: Problems of Geology and Subsurface Development

Voroshilov, V.^1 ; Savinova, O.^1 ; Ananev, Yu.^1 ; Abramova, R.^1

Tomsk Polytechnic University, Tomsk, Russia^1

关键词: Circular pattern;    Different grades;    Fluid inclusion;    Geochemical fields;    Geological conditions;    Internal structure;    Satellite images;    Zonal structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/21/1/012009/pdf
DOI  :  10.1088/1755-1315/21/1/012009

来源: IOP

【 摘 要 】

The composition and internal structure of geochemical fields associated to hydrothermal gold deposits within the Siberian territory were investigated. The concentric zonal structure of ore-forming geochemical fields embracing accumulations of Au, Ag, Bi, Pb, Zn, Cu, Te, As in ore bodies and their adjacent locations, and Ni, Co, V, Cr, Mn, Ba, Ti - within the external margin of gold ore formations were determined. The thermometric properties of gas-fluid inclusions in minerals of hydrothermal gold deposits were described. The results specified not only high-mineralized but also weakly-salted fluids are involved in the formation of the deposit. The latter is subjected to both retrogressive boiling and the mechanisms of direct and reverse osmosis. In this case, ascending and descending fluids produce eddy fluxes during Earth rotation, where minerals of different composition are formed in this flow path. Produced spiral mineral-geochemical fields can be observed on satellite images as hierarchy circular pattern system. Both the analysis of anomalous geochemical field structure and satellite images make it possible to predict the ore bodies of different grades in complicated landscape geological conditions.