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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">gtcrust</journal-id><journal-title-group><journal-title xml:lang="ru">Геодинамика и тектонофизика</journal-title><trans-title-group xml:lang="en"><trans-title>Geodynamics &amp; Tectonophysics</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2078-502X</issn><publisher><publisher-name>Institute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.5800/GT-2016-7-4-0227</article-id><article-id custom-type="elpub" pub-id-type="custom">gtcrust-314</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>ПАЛЕОГЕОДИНАМИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PALEOGEODYNAMICS</subject></subj-group></article-categories><title-group><article-title>МИНЕРАЛОГО-ГЕОХИМИЧЕСКИЕ СВИДЕТЕЛЬСТВА ПОЛИСТАДИЙНОСТИ ФОРМИРОВАНИЯ МЕСТОРОЖДЕНИЯ ЧЕРТОВО КОРЫТО</article-title><trans-title-group xml:lang="en"><trans-title>MINERALOGICAL AND GEOCHEMICAL EVIDENCE FOR MULTI-STAGE FORMATION OF THE CHERTOVO KORYTO DEPOSIT</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>Тарасова</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarasova</surname><given-names>Yu. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тарасова Юлия Игоревна, кандидат геолого-минералогических наук</p><p>664033, Иркутск, ул. Фаворского, 1А</p></bio><bio xml:lang="en"><p>Tarasova, Yulia I., Candidate of Geology and Mineralogy</p><p>1A Favorsky street, Irkutsk 664033</p></bio><email xlink:type="simple">j.tarasova84@yandex.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>Соцкая</surname><given-names>О. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Sotskaya</surname><given-names>О. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соцкая Ольга Тарасовна, кандидат геолого-минералогических наук</p><p>685000, Магадан, ул. Портовая, 6</p></bio><bio xml:lang="en"><p>Sotskaya, Olga T., Candidate of Geology and Mineralogy</p><p>6 Portovaya street, Magadan 685000</p></bio><email xlink:type="simple">sotskaya@neisri.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скузоватов</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Skuzovatov</surname><given-names>S. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Скузоватов Сергей Юрьевич, кандидат геолого-минералогических наук</p><p>664033, Иркутск, ул. Фаворского, 1А</p></bio><bio xml:lang="en"><p>Skuzovatov, Sergei Yu., Candidate of Geology and Mineralogy</p><p>1A Favorsky street, Irkutsk 664033</p></bio><email xlink:type="simple">skuzovatov@igc.irk.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ванин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Vanin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ванин Вадим Александрович, кандидат геолого-минералогических наук</p><p>664033, Иркутск, ул. Лермонтова, 128</p></bio><bio xml:lang="en"><p>Vanin, Vadim A., Candidate of Geology and Mineralogy I</p><p>128 Lermontov street, Irkutsk 664033</p></bio><email xlink:type="simple">vanin_geo@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Куликова</surname><given-names>З. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulikova</surname><given-names>Z. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Куликова Зоя Ивановна Институт геохимии им. А.П. Виноградова СО РАН</p><p>664033, Иркутск, ул. Фаворского, 1А</p></bio><bio xml:lang="en"><p>Kulikova, Zoya I.</p><p>1A Favorsky street, Irkutsk 664033</p></bio><email xlink:type="simple">kulikova@igc.irk.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Будяк</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Budyak</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Будяк Александр Евгеньевич, кандидат геолого-минералогических наук</p><p>664033, Иркутск, ул. Фаворского, 1А </p></bio><bio xml:lang="en"><p>Budyak, Aleksander E., Candidate of Geology and Mineralogy</p><p>1A Favorsky street, Irkutsk 664033</p></bio><email xlink:type="simple">budyak@igc.irk.ru</email><xref ref-type="aff" rid="aff-5"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт геохимии им. А.П. Виноградова СО РАН; &#13;
Иркутский научный центр СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS; &#13;
Irkutsk Scientific Center, Siberian Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Северо-Восточный комплексный научно-исследовательский институт им. Н.А. Шило ДВО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N.A. Shilo North-East Interdisciplinary Scientific Research Institute, Far East Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт геохимии им. А.П. Виноградова СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Институт земной коры СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of the Earth’s Crust, Siberian Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Институт геохимии им. А.П. Виноградова СО РАН; &#13;
Иркутский научный центр СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.P. Vinogradov Institute of Geochemistry, Siberian Branch of RAS,; &#13;
Irkutsk Scientific Center, Siberian Branch of RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>22</day><month>12</month><year>2016</year></pub-date><volume>7</volume><issue>4</issue><fpage>663</fpage><lpage>677</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тарасова Ю.И., Соцкая О.Т., Скузоватов С.Ю., Ванин В.А., Куликова З.И., Будяк А.Е., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Тарасова Ю.И., Соцкая О.Т., Скузоватов С.Ю., Ванин В.А., Куликова З.И., Будяк А.Е.</copyright-holder><copyright-holder xml:lang="en">Tarasova Y.I., Sotskaya О.T., Skuzovatov S.Y., Vanin V.A., Kulikova Z.I., Budyak A.E.</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.gt-crust.ru/jour/article/view/314">https://www.gt-crust.ru/jour/article/view/314</self-uri><abstract><sec><title>Введение</title><p>Введение. Ленская золотоносная провинция является одной из крупнейших по запасам золота во всем мире. Несмотря на длительную историю работ на данной территории, генезис месторождений Au, приуроченных к черносланцевым отложениям Бодайбинского синклинория, до сих пор остается открытым. Наиболее дискуссионными являются вопросы, связанные с определением источника полезного компонента и выявлением механизма его перераспределения и концентрирования. Цель настоящей работы – выявление этапности формирования месторождения Чертово Корыто на основании детальной минералого-геохимической характеристики руд, околорудных метасоматитов и вмещающих их черносланцевых отложений раннепротерозойского возраста, а также оценка применимости сухоложской модели для формирования месторождения.</p></sec><sec><title>Геологическая позиция</title><p>Геологическая позиция. Ленская золотоносная провинция приурочена к зоне сочленения Сибирской платформы и Байкальской горной области (рис. 1). Одним из главных элементов геологического строения рассматриваемой площади является Чуйско-Тонодско-Нечерский антиклинорий. Положение осевой части антиклинория подчеркивают выступы пород раннепротерозойского возраста, в которых значительные площади занимают массивы гранитоидов. Месторождение Чертово Корыто расположено в пределах Кевактинского рудного узла, приуроченного к Тонодскому поднятию и представляющего собой крупный интенсивно тектонически нарушенный блок, заключенный между Кевактинским и Амандракским массивами гранитоидов. Рудная зона месторождения, мощностью 150 м и протяженностью 1.5 км, приурочена к висячему боку складчато-разломной области, оперяющей Амандракский глубинный разлом (рис. 2).</p></sec><sec><title>Вещественный состав</title><p>Вещественный состав. В пределах рудной зоны месторождения породы михайловской свиты представлены углеродсодержащими сланцами полевошпат-хлорит-серицит-кварцевого состава с гнездообразными рудными скоплениями пирит-кварцевого состава и прожилками кварца. Установлено пять минеральных ассоциаций, сформированных в результате разновременных процессов, поэтапно сменяющих друг друга:</p><p>- наиболее ранняя ассоциация связана с кварц-мусковит-серицитовым метасоматозом и выносом РЗЭ и ряда других элементов из пород с их частичным переотложением;</p><p>- метаморфическая сульфидизация представлена рассеянной вкрапленностью пирротина с образованием мелких, значительно вытянутых (до 0.7 см по длинной оси) вдоль рассланцевания линзочек пирротина (рис. 3, a, b);</p><p>- рудная минерализация представлена наложенной гидротермальной ассоциацией золота с арсенопиритом (рис. 3, d);</p><p>- поздняя халькофильная минерализация, образовавшаяся на завершающем этапе гидротермально-метасоматического процесса (рис. 3, e, f);</p><p>- пострудное окварцевание.</p><p>Геохимическая характеристика. В результате геохимического изучения пород и руд месторождения Чертово Корыто установлено, что отложения михайловской свиты характеризуются повышенными содержаниями, относительно стандартов PAAS [Condie, 1993] и СЧС-1 [Petrov et al., 2004], таких породообразующих элементов как Al2O3, Fe2O3общ, MgO, K2O, и P2O5. Характерно то, что содержание практически всех оксидов в рудной зоне имеет тенденцию к снижению. Исключением является SiO2 (табл. 1). Распределение редких элементов повторяет закономерность, установленную для петрогенных элементов. Наименее измененные породы михайловской свиты характеризуются повышением содержания (до трех раз) Cu, Mo, Ba, W, As, Pb относительно значений PAAS и СЧС-1, в то время как в рудной зоне содержание практически всех редких элементов заметно снижается (табл. 2). Содержание ряда элементов сидерофильной группы (Co, Ni) имеет четкую корреляцию с рудными процессами, проявляя увеличение в два раза и более в зоне околорудных изменений. Максимальные концентрации Co и Ni отмечены в пробах с рудными содержаниями золота.</p></sec><sec><title>Выводы</title><p>Выводы. Формирование месторождения Чертово Корыто происходило в пять этапов, первые два из которых являются дорудными, носят рудоподготовительный характер и, вероятно, значительно оторваны по времени от основного рудоформирующего события. Установленная стадийность формирования месторождений Чертово Корыто коррелирует с основными стадиями тектонометаморфической истории региона и согласуется с моделью формирования месторождений сухоложского типа [Nemerov, 1989; Buryak, Khmelevskaya, 1997; Large et al., 2007].</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The Lena gold province is one of the largest known gold resources in the world. The history of its exploration is long, but the genesis of gold mineralization hosted in black shales in the Bodaibo synclinorium still remains unclear. The studies face the challenge of discovering sources for the useful component and mechanisms of its redistribution and concentration. This study aims to clarify the time sequence of the ore mineralization in the Chertovo Koryto deposit on the basis of detailed mineralogical and geochemical characteristics of the ore, wallrock metasomatites and the Early Proterozoic host black shales, and to assess the applicability of the Sukhoi Log model for clarifying the Chertovo Koryto origin.</p></sec><sec><title>Geological setting</title><p>Geological setting. The Lena gold province is located in the junction area of the Siberian platform and the Baikal mountain region (Fig. 1). The main element of its geological structure is the Chuya-Tonoda-Nechera anticline. Its axial segment is marked by horsts composed of the Early Proterozoic rocks with abundant granitoid massifs. The Chertovo Koryto deposit is located within the Kevakta ore complex at the Tonoda uplift, the largest tectonically disturbed block between the Kevakta and Amandrak granitoids massifs. The 150 m thick and 1.5 km long ore zone of the Chertovo Koryto deposit is confined to the hanging wall of the fold-fault zone feathering the Amandrak deep fault (Fig. 2).</p></sec><sec><title>Composition</title><p>Composition. In the ore zone, rocks of the Mikhailovsk Formation include carbonaceous shales of the feldspar-chlorite-sericite-quartz composition with nest-shaped ore accumulations of the pyrite-quartz composition and quartz veinlets. In our study, we distinguish five mineral associations resulting from heterochronous processes that sequentially replaced each other:</p><p>- The earliest association related with the quartz-muscovite-sericite metasomatism and the removal of REE and other elements from the rocks and their partial redeposition;</p><p>- Metamorphic sulphidization presented by scattered impregnations of pyrrhotite, as evidenced by small lenses of pyrrhotite, which are considerably elongated (axes up to 0.7 cm long) along the foliation planes (Figs 3, a, b);</p><p>- Ore mineralization represented by a superimposed hydrothermal gold association with arsenopyrite (Fig. 3, d);</p><p>- Late chalcophilic mineralization formed at the final stage of hydrothermal-metasomatic process (Figs 3, e, f);</p></sec><sec><title>- Post-ore silification</title><p>- Post-ore silification.</p><p>Geochemical characteristics. The geochemical study of rocks and ores from the Chertovo Koryto deposit show that the rocks of the Mikhailovsk Formation are characterized by higher contents of rock-forming elements, such as of Al2O3, Fe2O3total, MgO, K2O, and P2O5, in comparison to the PAAS standards [Condie, 1993] and the black shale standard composition (SChS-1) [Petrov et al., 2004]. A characteristic feature of the ore zone is that the contents of practically all the oxides, except SiO2, tend to decrease (Table 1). The distribution of rare elements repeats the pattern established for major elements. The least metamorphosed rocks of the Mikhailovsk Formation have higher contents (up to three times) of Cu, Mo, Ba, W, As, Pb relative to the values in the PAAS and SChS-1 standards. In the ore zone, the contents of almost all rare elements are considerably reduced (Table 2). The contents of elements in the siderophile group (Co, Ni) are clearly correlated with the ore processes and increased more than twice in the area of metamorphic changes. Samples with gold-ore grade contents show the highest concentrations of Co and Ni.</p></sec><sec><title>Conclusion</title><p>Conclusion. In our opinion, the Chertovo Koryto deposit was formed in five stages, the first two of which were pre-ore, with ore preparation, and probably considerably distant in time from the main ore-generating event. The staged formation of the Chertovo Koryto deposit correlates with the basic stages in the tectono-metamorphic history of the study region and is consistent with the model showing the formation of Sukhoi Log-type deposits [Nemerov, 1989; Buryak, Khmelevskaya, 1997; Large et al., 2007]. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>золото</kwd><kwd>черные сланцы</kwd><kwd>модель метаморфогенно-метасоматического формирования</kwd><kwd>Чертово Корыто</kwd><kwd>Байкало-Патомское нагорье</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gold</kwd><kwd>black shales</kwd><kwd>model of metamorphic-metasomatic formation</kwd><kwd>Chertovo Koryto</kwd><kwd>the Baikal-Patom Highland (Plateau)</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">Buryak V.A., Khmelevskaya N.M., 1997. 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