Wallrock metasomatites of barite-polymetallic deposits of Zmeinogorsk ore district (Rudny Altai)
The relevance of the research is caused by depletion of mineral resources of the north-western part of Rudny Altai region. In this relation it is necessary to find new hidden objects of barite-polymetallic ores in this region. As wallrock-alterated rocks accompany inherently mineralization, their de...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2017-11-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya.tpu.ru/archive/article/view/1930 |
| Summary: | The relevance of the research is caused by depletion of mineral resources of the north-western part of Rudny Altai region. In this relation it is necessary to find new hidden objects of barite-polymetallic ores in this region. As wallrock-alterated rocks accompany inherently mineralization, their detailed study will allow predicting the presence of hidden polymetallic mineralization within Zmeinogorsk ore region. The main aim of the study is to determine petrographic, mineralogical and some genetic characteristics of the wallrock-alterated rocks from Zarechensk and Strizhkovsk barite-polymetallic deposits in the north-western part of Zmeinogorsk ore region (Rudny Altai). Research methods. The authors have carried out the comprehensive study of wallrock-alterated rocks, including characteristics of non-metal and ore mineralization on the polarizing microscope, besides the study of rocks and minerals by X-ray energy-dispersive microanalysis, X-ray luminescence, X-ray fluorescence (XRF) and atomic absorption analysis were investigated. The results. The studied wallrock-alterated rocks from Zarechensk and Strizhkovsk barite-polymetallic deposits have similar mineral composition and belong to noncalcareous facies of beresites. The main rock-forming minerals are quartz, chlorite, sericite; secondary minerals include pyrite and in small amounts sulfides of ore step (sphalerite, galena, chalcopyrite), preferably in the form of veinlets; rare minerals are apatite, zircon, and rutile. The presence of rare earth mineralization was found out as well. Some typomorphic features of major, minor and rare minerals were fixed. The existence of three generations of quartz in the studied rocks and their luminescence centers were determined. Chlorite of the studied rocks, belonging to the range clinochlore - pennine, was used as a natural geothermometer for determining the approximate temperature range of wallrock-alterated rocks formation. The calculated temperature for chlorites from Zarechensk deposit was 210…240 C and from those from Strizhkovsk deposit - 220…230 C. Industrial contents of gold and silver were not identified in the studied rocks. |
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| ISSN: | 2500-1019 2413-1830 |