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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">nznistu</journal-id><journal-title-group><journal-title xml:lang="ru">Науки о Земле и недропользование</journal-title><trans-title-group xml:lang="en"><trans-title>Earth sciences and subsoil use</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-9993</issn><issn pub-type="epub">2686-7931</issn><publisher><publisher-name>Federal State Budget Educational Institution of Higher Education "Irkutsk National Research Technical University"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/2686-9993-2021-44-1-39-47</article-id><article-id custom-type="elpub" pub-id-type="custom">nznistu-129</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Геология, поиски и разведка месторождений полезных ископаемых</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Geology, Prospecting and Exploration of Mineral Deposits</subject></subj-group></article-categories><title-group><article-title>Структура поверхности высокопробного самородного золота Приамурья</article-title><trans-title-group xml:lang="en"><trans-title>Surface structure of Amur region high grade native gold</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Радомский</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Radomskiy</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Радомский Сергей Михайлович, кандидат геолого-минералогических наук, научный сотрудник Лаборатории рудогенеза</p><p>675000, г. Благовещенск, Рёлочный пер., 1 </p></bio><bio xml:lang="en"><p> Sergey M. Radomskiy, Cand. Sci. (Geol. &amp; Mineral.), Researcher of the Ore Genesis Laboratory</p><p>1 Relochy Lane, Blagoveschensk 675000 </p></bio><email xlink:type="simple">rsm@ascnet.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Радомская</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Radomskaya</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Радомская Валентина Ивановна, кандидат химических наук, ведущий научный сотрудник Лаборатории биогеохимии</p><p>675000, г. Благовещенск, Рёлочный пер., 1</p></bio><bio xml:lang="en"><p> Valentina I. Radomskaya, Cand. Sci. (Chemistry), Leading Researcher of the Laboratory of Biogeochemistry</p><p>1 Relochy Lane, Blagoveschensk 675000 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геологии и природопользования ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>05</day><month>04</month><year>2021</year></pub-date><volume>44</volume><issue>1</issue><fpage>39</fpage><lpage>47</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Радомский С.М., Радомская В.И., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Радомский С.М., Радомская В.И.</copyright-holder><copyright-holder xml:lang="en">Radomskiy S.M., Radomskaya V.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.nznj.ru/jour/article/view/129">https://www.nznj.ru/jour/article/view/129</self-uri><abstract><p>Целью данного исследования являлось изучение структуры поверхности высокопробного золота. Предметом исследования служили золоторудные месторождения Приамурья, объектом исследования стали образцы самородных высокопробных золотин с этих месторождений. В ходе работы были использованы методы термодинамики и рентгеновской электронной микроскопии. В результате была установлена многослойная структура поверхности высокопробных минералов самородного золота Приамурья со следующими уровнями: пограничный слой с нулевой степенью окисления Au0 в форме металлического золота желтого цвета; оксидный слой со степенью окисления Au+1 в форме Au2O фиолетового цвета; оксидный слой со степенью окисления Au+3 в форме Au2O3 желто-коричневого цвета; гидратированный оксидный слой со степенью окисления Au+3 в форме Au(OH)3 красно-желто-коричневого цвета. Методами электронной микроскопии выделяются внешние структуры поверхности – плотные оксидные слои формы Au2O3 и рыхлые гидратированные слои формы Au(OH)3, тогда как внутренние слои металлического и одновалентного золота не просматриваются. Важными термодинамическими характеристиками представленных уровней являются значения стандартных окислительно-восстановительных потенциалов E°, определяющих их физико-химические свойства: для металлического золота E° = +1,68 В; для оксидного слоя со степенью окисления Au+1 в форме Au2O E° = +0,32 В; для оксидного слоя со степенью окисления Au+3 в форме Au2O3 E° = +1,36 В; для гидратированного оксидного слоя со степенью окисления Au+3 в форме Au(OH)3 E° = +0,7 В. Результаты проведенных авторами исследований свидетельствуют о том, что структура поверхности имеет несколько понижающих окислительно-восстановительный потенциал слоев, что объясняет генерирование и образование мигрирующих форм золота в увлажненных гипергенных условиях окружающей природной среды.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of the research is to study the surface structure of high grade gold. The subject of research is gold ore fields in the Amur region. The object of the study is samples of native high grade gold grains from these fields. The study uses the methods of thermodynamics and X-ray electron microscopy. The study results in revealing a multilayer structure of the surface of high grade minerals of the Amur region native gold with the following levels: a boundary layer with zero oxidation degree Au0 in the form of yellow metallic gold; an oxide layer with the oxidation degree Au+1 in the form of purple Au2O; an oxide layer with the oxidation degree Au+3 in the form of a yellow-brown Au2O3; a hydrated oxide layer with the oxidation degree Au+3 in the form of a red-yellow-brown Au(OH)3. The methods of electron microscopy have allowed to identify external surface structures – dense oxide layers of the form of Au2O3 and loose hydrated layers of the form of Au(OH)3, whereas the inner layers of metallic and monovalent gold are not visible. Important thermodynamic characteristics of the presented levels are the values of standard oxidation-reduction potentials (E°), which determine their physicochemical properties: for metallic gold E° = +1.68 V; for the oxide layer with the oxidation degree Au+1 in the form of Au2O – E° = +0.32 V; for the oxide layer with the oxidation degree Au+3 in the form of Au2O3 – E° = +1.36 V; for the hydrated oxide layer with the oxidation degree Au+3 in the form of Au(OH)3 – E° = +0.7 V. The results of the conducted studies indicate that the surface structure has several layers that lower the oxidation-reduction potential, which explains the generation and formation of migratory forms of gold in humid hypergene conditions of natural environment.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>геохимия</kwd><kwd>золото</kwd><kwd>структура поверхности</kwd><kwd>Приамурье</kwd></kwd-group><kwd-group xml:lang="en"><kwd>geochemistry</kwd><kwd>gold</kwd><kwd>surface structure</kwd><kwd>Amur region</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Blowes D.W., Ptacek C.J., Jambor J.L., Weisener C.G. The geochemistry of acid mine drainage // Environmental geochemistry / eds. H.D. Holland, K.K. Turekian. Vol. 9. Oxford: Elsevier-Pergamon, 2003. P. 149–204.</mixed-citation><mixed-citation xml:lang="en">Blowes DW, Ptacek CJ, Jambor JL, Weisener CG. 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