Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye)
The study of native gold in the exhausted placers is an urgent task as the accumulated dumps are the potential sources of gold because of the significant loss of fine gold through the extraction. The aim of the research is to elucidate the substance-mineral state of the exhausted placers of the Nizh...
| Main Authors: | , |
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2017-09-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
| Subjects: | |
| Online Access: | http://izvestiya-tpu.ru/archive/article/view/1848 |
| _version_ | 1797812367646523392 |
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| author | Petr Petrovich Safronov Inna Vladimirovna Kuznetsova |
| author_facet | Petr Petrovich Safronov Inna Vladimirovna Kuznetsova |
| author_sort | Petr Petrovich Safronov |
| collection | DOAJ |
| description | The study of native gold in the exhausted placers is an urgent task as the accumulated dumps are the potential sources of gold because of the significant loss of fine gold through the extraction. The aim of the research is to elucidate the substance-mineral state of the exhausted placers of the Nizhneselemdzhinsky gold-bearing node in Priamurye with primary study of phase composition of native gold enclosed in them; reveal the reasons responsible for hetero-geneity of gold composition. Methods of investigations: energy-dispersion X-ray spectral analysis carried out using the analytical raster electron microscope EVO 40XVP; to interpret the obtained data on gold compositions the authors have constructed the binary and triple diagrams for them and the histograms of the occurrence frequency of gold-bearing phases of different purity. Results. The authors determined the significant composition heterogeneity of most of gold samples. They consist of gold phases of different purity (up to the highest one - 1000 %) and amalgams represented by two-, three- and four-component solid solutions of gold with mercury, lead, and silver (Au-Hg, Au-Ag-Hg, Au-Hg-Pb, Au-Ag-Hg-Pb). The whole set of intermetallic compounds of these elements was recognized among the amalgams. The multiphase composition of native gold is explained by the summary action of several independent processes on it: 1 - chemical interaction of gold with mercury through the extraction of this metal during mining; 2 - similar interaction of gold with mercury but of less intensity that takes place later immediately in the dumps; 3 - changes of gold composition in the dumps due to the action of the near-surface water solutions on it. It was defined that the technogene placers of the Nizhneselemdzhinsky node are dominated by the gold-bearing phases of a high purity - 900-1000 % that indicates the perspective repeated processing of these placers for gold. |
| first_indexed | 2024-03-13T07:37:23Z |
| format | Article |
| id | doaj.art-2c9de6abd0644fa992ce1c2f6b0addc2 |
| institution | Directory Open Access Journal |
| issn | 2500-1019 2413-1830 |
| language | Russian |
| last_indexed | 2024-03-13T07:37:23Z |
| publishDate | 2017-09-01 |
| publisher | Tomsk Polytechnic University |
| record_format | Article |
| series | Известия Томского политехнического университета: Инжиниринг георесурсов |
| spelling | doaj.art-2c9de6abd0644fa992ce1c2f6b0addc22023-06-03T21:11:58ZrusTomsk Polytechnic UniversityИзвестия Томского политехнического университета: Инжиниринг георесурсов2500-10192413-18302017-09-013282Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye)Petr Petrovich SafronovInna Vladimirovna KuznetsovaThe study of native gold in the exhausted placers is an urgent task as the accumulated dumps are the potential sources of gold because of the significant loss of fine gold through the extraction. The aim of the research is to elucidate the substance-mineral state of the exhausted placers of the Nizhneselemdzhinsky gold-bearing node in Priamurye with primary study of phase composition of native gold enclosed in them; reveal the reasons responsible for hetero-geneity of gold composition. Methods of investigations: energy-dispersion X-ray spectral analysis carried out using the analytical raster electron microscope EVO 40XVP; to interpret the obtained data on gold compositions the authors have constructed the binary and triple diagrams for them and the histograms of the occurrence frequency of gold-bearing phases of different purity. Results. The authors determined the significant composition heterogeneity of most of gold samples. They consist of gold phases of different purity (up to the highest one - 1000 %) and amalgams represented by two-, three- and four-component solid solutions of gold with mercury, lead, and silver (Au-Hg, Au-Ag-Hg, Au-Hg-Pb, Au-Ag-Hg-Pb). The whole set of intermetallic compounds of these elements was recognized among the amalgams. The multiphase composition of native gold is explained by the summary action of several independent processes on it: 1 - chemical interaction of gold with mercury through the extraction of this metal during mining; 2 - similar interaction of gold with mercury but of less intensity that takes place later immediately in the dumps; 3 - changes of gold composition in the dumps due to the action of the near-surface water solutions on it. It was defined that the technogene placers of the Nizhneselemdzhinsky node are dominated by the gold-bearing phases of a high purity - 900-1000 % that indicates the perspective repeated processing of these placers for gold.http://izvestiya-tpu.ru/archive/article/view/1848technogene placersnative goldgold amalgamintermetallic compoundsdiagrams of compositions |
| spellingShingle | Petr Petrovich Safronov Inna Vladimirovna Kuznetsova Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) Известия Томского политехнического университета: Инжиниринг георесурсов technogene placers native gold gold amalgam intermetallic compounds diagrams of compositions |
| title | Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) |
| title_full | Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) |
| title_fullStr | Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) |
| title_full_unstemmed | Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) |
| title_short | Special features of composition of native gold from technogene placers on the example of the Nizhneselemdzhinsky gold-bearing node (Priamurye) |
| title_sort | special features of composition of native gold from technogene placers on the example of the nizhneselemdzhinsky gold bearing node priamurye |
| topic | technogene placers native gold gold amalgam intermetallic compounds diagrams of compositions |
| url | http://izvestiya-tpu.ru/archive/article/view/1848 |
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