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PETROLOGY OF ORE-BEARING METASOMATITES OF GOLD DEPOSIT KOKKYIA (SOUTH KAZAKHSTAN)
Abstract
The deposit Kokkyia is located in the exocontact zone of granodiorite intrusion, and zones of hydrothermal alteration, which enclose gold mineralization, are controlled by small intrusions of diorite and syenite of the Upper Devonian intrusive complex and are located in volcanic rocks of sour alkali and medium composition. Practically all the difference of rocks are affected by the processes of hydrothermal changes and are shown as the processes of propylitic nature: albitization, feldspathization, chloritization, carbonatization, sericitization and others. Zones with gold mineralization gravitate to the internal facies of metamorphism, which are composed of quartz, sericite, muscovite, zuniite, actinolite, tourmaline, diaspor and a group of montmorillonite and kaolinite minerals. Metasomastite occurences of internal facies form a significant in development area hydrothermal zones, which can be classified as secondary quartzites, greisens and beresites. In the quartz-sericite metasomatites micrograins (0,009-0,005 mm) of pyrite (2%) pentagondodekaedral and cubical shapes and aggregates of fine dispersed leucoxene and rutile (3%) of irregular shapes are encountered. In the porphyroblasts aggregates of green chlorite (15%), chloritized hornblend (5%) and pyrite (10%) often occur. Propylitized monzodiorite is of dark-gray colour, in the split on which there is rare dissemination of pyrite. Plagioclase (40%) is of prismatic shape, moreoften in the form of separate grains and less often in the form of clusters of several grains intensively substituted by sericite, sometimes by albite and calcite. Sulfides are in the form of irregular grains up to 0.01 mm in size most are developed in the base tissue, less often at the contact with chloritized hornblend and plagioclase, but everywhere it is in close contact with carbonate.
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References9
Baibatsha A.B., Mamanov E.Zh. Geology and geodynamics of Karsakpay-Ulytau geosuture zone and its prospects for minerals // News of the academy of sciences of the Republic of Kazakhstan. Series of geology and technical sciences. Vol.1, №421, 2017, pp 46-62;
Degtyarev K.E., Ruazantsev A.V. et al. Neoproterozoic-Early Paleozoic tectonic evolution of the western part of the Kyrgyz ridge (Northern Tian Shan) caledonides. Geotectonics, Russia, №6, 2013, pp 377-417;
Degtyarev K.E., Tolmacheva T.U., Ruazantsev A.V. et al. The structure, the justification of age and the tectonic position of the lower-middleodovian volcanic-sedimentary and plutonic complexes of the western part of the Kirghiz ridge (Northern Tian Shan). Stratigraphy, Geological correlation, Russia, Vol. 20, №4, 2012, pp 3-32;
Baibatsha A.B., Omarova G., Dyussembayeva K.Sh., Kassenova A.T. Kokkiya - a promising for Kazakhstan gold-metasomatic type of deposit// 16th International Multidisciplinary Scientific Geoconference, Albena, Bulgaria, 2016, pp. 289-296;
Pak N.T. Models of metasomatic zonation of gold deposits as a method of their predictive evaluation. Bekzhanov readings. Kazakhstan, 2016. pp. 46-49;
Rafailovich M.S. Subsoil gold of Kazakhstan: Geology, metallogeny, forecast-search model. Kazakhstan, 2009, 304 p;
Rafailovich M.S. Gold-bearing metasomatic formation of Kazakhstan. Ural geological journal. №5, 2000, pp. 41-84;
Pak N.T. Model of ore-metasomatic zoning of the Taldy-Bulak Levoberezhni deposit. Modern problems of geology, mineralogy and complex elaboration of mineral deposits of the Greate Altai, Kazakhstan, 2003, pp. 205-208;
Spiridonov E.M., Pletniov P.A. Solotaya gora deposit of cuprous gold (about “golden-rodingite” formation. Scientific World, Russia, 2002, 220 p.
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