Mineralogy of the Svetloye epithermal district, Okhotsk-Chukotka volcanic belt, and its insights for exploration
| Parent link: | Ore Geology Reviews Vol. 136.— 2021.— [104257, 20 p.] |
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| Korporativní autor: | |
| Další autoři: | , , , , , , , |
| Shrnutí: | Title screen The Svetloye epithermal district (SED) is located within the Okhotsk-Chukotka volcanic belt (OCVB), 220 km southwest of Okhotsk. The OCVB, which formed during the Cretaceous with ore potential, is a large marginal volcanic rock belt associated with continental subduction. Svetloye occupies two volcanic edifices of different ages - the northwestern volcanic center (including the Emmy deposit) consists of basaltic-andesite of the Khetanian suite (Coniacian-Santonian time (K2), and the southeastern volcanic center (hosts the Elena, Tamara, Lyudmila, and Larisa deposits) comprises the dacite-rhyolite-leucogranite formation of the Urak suite (Campanian-Maastrichtian time (K2). Distinct host rocks and different levels of erosion in the two edifices of Svetloye led to various altered rocks, mineral assemblages, and diverse types of gold mineralization. The alteration halo of the Emmy deposit contains vuggy residual quartz, with Au-Ag-telluride and Au-Ag mineralization plus other tellurium-bearing minerals (goldfieldite, kawazulite, coloradoite, melonite, altaite, tellurobismuthite, tellurantimony, and native tellurium). Altered rocks of the other deposits are characterized by variable halos, including vuggy residual quartz, alunite, dickite, quartz-alunite-dickite, illite-chlorite, illite, illite-smectite, smectite, quartz-carbonate, and quartz-white mica alteration, hypogene and supergene processes. The hydrothermal (hypogene) and supergene ore processes within the SED occurred in 3 stages: leaching and barren quartz-rutile-pyrite zone with halos of quartz-alunite-dickite-pyrite (or quartz-illite-chlorite-calcite-pyrite), then quartz-pyrite with polysulfides and gold, gold-silver telluride, and finally supergene with 'mustard' gold. The alteration halo, epithermal ore bodies as hydrothermal veins and breccias with vug infill, colloform, and crustiform textures, hypogene sulfide assemblage represented by galena, sphalerite, tennantite-tetraedrite, and chalcopyrite of SED are typical of epithermal styles with an high-intermediate sulfidation signature, possibly indicates a porphyry deposit at depth. The lack of high-sulfidation-state sulfides such as hypogene covellite, enargite, famatinite, luzonite in the residual quartz may be due to their erosion at shallower paleodepth, and/or to their supergene oxidation below the present day surface. Режим доступа: по договору с организацией-держателем ресурса |
| Jazyk: | angličtina |
| Vydáno: |
2021
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| Témata: | |
| On-line přístup: | https://doi.org/10.1016/j.oregeorev.2021.104257 |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665802 |
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| 200 | 1 | |a Mineralogy of the Svetloye epithermal district, Okhotsk-Chukotka volcanic belt, and its insights for exploration |f T. Yu. Yakich, Yu. S. Ananyev, A. S. Ruban [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 330 | |a The Svetloye epithermal district (SED) is located within the Okhotsk-Chukotka volcanic belt (OCVB), 220 km southwest of Okhotsk. The OCVB, which formed during the Cretaceous with ore potential, is a large marginal volcanic rock belt associated with continental subduction. Svetloye occupies two volcanic edifices of different ages - the northwestern volcanic center (including the Emmy deposit) consists of basaltic-andesite of the Khetanian suite (Coniacian-Santonian time (K2), and the southeastern volcanic center (hosts the Elena, Tamara, Lyudmila, and Larisa deposits) comprises the dacite-rhyolite-leucogranite formation of the Urak suite (Campanian-Maastrichtian time (K2). Distinct host rocks and different levels of erosion in the two edifices of Svetloye led to various altered rocks, mineral assemblages, and diverse types of gold mineralization. | ||
| 330 | |a The alteration halo of the Emmy deposit contains vuggy residual quartz, with Au-Ag-telluride and Au-Ag mineralization plus other tellurium-bearing minerals (goldfieldite, kawazulite, coloradoite, melonite, altaite, tellurobismuthite, tellurantimony, and native tellurium). Altered rocks of the other deposits are characterized by variable halos, including vuggy residual quartz, alunite, dickite, quartz-alunite-dickite, illite-chlorite, illite, illite-smectite, smectite, quartz-carbonate, and quartz-white mica alteration, hypogene and supergene processes. The hydrothermal (hypogene) and supergene ore processes within the SED occurred in 3 stages: leaching and barren quartz-rutile-pyrite zone with halos of quartz-alunite-dickite-pyrite (or quartz-illite-chlorite-calcite-pyrite), then quartz-pyrite with polysulfides and gold, gold-silver telluride, and finally supergene with 'mustard' gold. The alteration halo, epithermal ore bodies as hydrothermal veins and breccias with vug infill, colloform, and crustiform textures, hypogene sulfide assemblage represented by galena, sphalerite, tennantite-tetraedrite, and chalcopyrite of SED are typical of epithermal styles with an high-intermediate sulfidation signature, possibly indicates a porphyry deposit at depth. The lack of high-sulfidation-state sulfides such as hypogene covellite, enargite, famatinite, luzonite in the residual quartz may be due to their erosion at shallower paleodepth, and/or to their supergene oxidation below the present day surface. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Ore Geology Reviews | ||
| 463 | |t Vol. 136 |v [104257, 20 p.] |d 2021 | ||
| 610 | 1 | |a электронный ресурс | |
| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a epithermal gold deposits | |
| 610 | 1 | |a alteration zonation | |
| 610 | 1 | |a paragenetic succession | |
| 610 | 1 | |a pyrite | |
| 610 | 1 | |a tennantite-tetraedrite | |
| 610 | 1 | |a Au-Ag-tellurides | |
| 610 | 1 | |a месторождения | |
| 610 | 1 | |a золото | |
| 610 | 1 | |a пириты | |
| 610 | 1 | |a минералогия | |
| 610 | 1 | |a геологоразведочные работы | |
| 701 | 1 | |a Yakich |b T. Yu. |c geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of geological and mineralogical sciences |f 1984- |g Tamara Yurievna |3 (RuTPU)RU\TPU\pers\43279 |9 21638 | |
| 701 | 1 | |a Ananyev |b Yu. S. |c Russian geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of Geological and Mineralogical Sciences |f 1966- |g Yuri Sergeyevich |3 (RuTPU)RU\TPU\pers\29550 |9 14086 | |
| 701 | 1 | |a Ruban |b A. S. |c geologist |c engineer of Tomsk Polytechnic University |f 1991- |g Aleksey Sergeevich |3 (RuTPU)RU\TPU\pers\34023 |9 17590 | |
| 701 | 1 | |a Gavrilov |b R. Yu. |c Russian geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of geological and mineralogical sciences |f 1978- |g Roman Yurievich |3 (RuTPU)RU\TPU\pers\32556 |9 16478 | |
| 701 | 1 | |a Lesnyak |b D. V. |g Dmitry Viktorovich | |
| 701 | 1 | |a Levochskaya |b D. V. |g Darjya Valentinovna | |
| 701 | 1 | |a Savinova |b O. V. |c Geologist |c associate Professor of Tomsk Polytechnic University, candidate of geological and mineralogical Sciences |f 1988- |g Olesya Vyacheslavovna |3 (RuTPU)RU\TPU\pers\33251 |9 16996 | |
| 701 | 1 | |a Rudmin |b M. A. |c geologist |c Associate Professor of Tomsk Polytechnic University, Candidate of Geological and Mineralogical Sciences |f 1989- |g Maksim Andreevich |3 (RuTPU)RU\TPU\pers\33254 |9 16999 | |
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