Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster)
Abstract The article considers petrographic compositions of the Mesozoic alkaline magmatic rocks of the Medvedey massif. The latter is a part of the Central Aldan ore district and is spatially located in the central part of the Nymnyr block. The massif is a multiphase structure, of the most producti...
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Online Access: | http://dx.doi.org/10.1088/1755-1315/609/1/012003 https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003/pdf https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003 |
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crioppubl:10.1088/1755-1315/609/1/012003 2024-06-02T08:15:51+00:00 Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) Ivanov, Aleksey Ivanov, Michil Zhuravlev, Anatolii 2020 http://dx.doi.org/10.1088/1755-1315/609/1/012003 https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003/pdf https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003 unknown IOP Publishing http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining IOP Conference Series: Earth and Environmental Science volume 609, issue 1, page 012003 ISSN 1755-1307 1755-1315 journal-article 2020 crioppubl https://doi.org/10.1088/1755-1315/609/1/012003 2024-05-07T14:06:23Z Abstract The article considers petrographic compositions of the Mesozoic alkaline magmatic rocks of the Medvedey massif. The latter is a part of the Central Aldan ore district and is spatially located in the central part of the Nymnyr block. The massif is a multiphase structure, of the most productive stage of development of the territory – the Mesozoic tectonic-magmatic activation of the Aldan-Stanovoy shield. The main purpose of this work was to identify qualitative quantitative-mineralogical characteristics of the massif rocks, potential for gold mineralization, using crystal-optical methods. As a result of the field works and petrographic studies of the Mesozoic alkaline magmatic rocks, it was determined that, The Medvedev massif has a zonal structure and is represented by three phases of intrusion with distinct contacts between the latter, which rocks differ in structural and material features. The rocks of the first phase of the massif are composed considerably of leucocrate (the content of dark-colored minerals is up to 9%) syenite-porphyry with elements of the monzonite structure. Magmatic formations of the second phase of the massif differ from those of the first phase primarily in structural features and are represented by hypidiomorphic granular differences with an increased content of dark-colored minerals in the rocks up to 15%. The rocks of the final phase have a noticeable difference from the first two phases and are represented by mesocratic monzonite porphyry with a clearly expressed monzonite structure with a dark-colored mineral content up to 20%. Within the Central Aldan ore region, the large Samolazovskoye gold deposit is associated with similar multiphase massifs, in particular with the Yukhtin massif. During field works, it was found that gold-ore mineralization is associated with the massif, which formation is related to an intensively occurred contact-metasomatic effect on the host rocks. Hydrothermal-metasomatic transformations of the latter are the products of multi-stage ... Article in Journal/Newspaper Yakutia IOP Publishing Aldan ENVELOPE(129.546,129.546,63.447,63.447) Stanovoy ENVELOPE(42.810,42.810,65.583,65.583) IOP Conference Series: Earth and Environmental Science 609 012003 |
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Abstract The article considers petrographic compositions of the Mesozoic alkaline magmatic rocks of the Medvedey massif. The latter is a part of the Central Aldan ore district and is spatially located in the central part of the Nymnyr block. The massif is a multiphase structure, of the most productive stage of development of the territory – the Mesozoic tectonic-magmatic activation of the Aldan-Stanovoy shield. The main purpose of this work was to identify qualitative quantitative-mineralogical characteristics of the massif rocks, potential for gold mineralization, using crystal-optical methods. As a result of the field works and petrographic studies of the Mesozoic alkaline magmatic rocks, it was determined that, The Medvedev massif has a zonal structure and is represented by three phases of intrusion with distinct contacts between the latter, which rocks differ in structural and material features. The rocks of the first phase of the massif are composed considerably of leucocrate (the content of dark-colored minerals is up to 9%) syenite-porphyry with elements of the monzonite structure. Magmatic formations of the second phase of the massif differ from those of the first phase primarily in structural features and are represented by hypidiomorphic granular differences with an increased content of dark-colored minerals in the rocks up to 15%. The rocks of the final phase have a noticeable difference from the first two phases and are represented by mesocratic monzonite porphyry with a clearly expressed monzonite structure with a dark-colored mineral content up to 20%. Within the Central Aldan ore region, the large Samolazovskoye gold deposit is associated with similar multiphase massifs, in particular with the Yukhtin massif. During field works, it was found that gold-ore mineralization is associated with the massif, which formation is related to an intensively occurred contact-metasomatic effect on the host rocks. Hydrothermal-metasomatic transformations of the latter are the products of multi-stage ... |
format |
Article in Journal/Newspaper |
author |
Ivanov, Aleksey Ivanov, Michil Zhuravlev, Anatolii |
spellingShingle |
Ivanov, Aleksey Ivanov, Michil Zhuravlev, Anatolii Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
author_facet |
Ivanov, Aleksey Ivanov, Michil Zhuravlev, Anatolii |
author_sort |
Ivanov, Aleksey |
title |
Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
title_short |
Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
title_full |
Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
title_fullStr |
Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
title_full_unstemmed |
Petrography of the Mesozoic Alkaline Rocks of the Medvedev Massif (South Yakutia, Aldan-Stanovoy Shield, Leglier Ore Cluster) |
title_sort |
petrography of the mesozoic alkaline rocks of the medvedev massif (south yakutia, aldan-stanovoy shield, leglier ore cluster) |
publisher |
IOP Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1088/1755-1315/609/1/012003 https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003/pdf https://iopscience.iop.org/article/10.1088/1755-1315/609/1/012003 |
long_lat |
ENVELOPE(129.546,129.546,63.447,63.447) ENVELOPE(42.810,42.810,65.583,65.583) |
geographic |
Aldan Stanovoy |
geographic_facet |
Aldan Stanovoy |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
IOP Conference Series: Earth and Environmental Science volume 609, issue 1, page 012003 ISSN 1755-1307 1755-1315 |
op_rights |
http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1755-1315/609/1/012003 |
container_title |
IOP Conference Series: Earth and Environmental Science |
container_volume |
609 |
container_start_page |
012003 |
_version_ |
1800740166898286592 |