Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region
Septaria of the Ulyanovsk region are high-quality jewelry and ornamental material. Septaria are associated with lower Cretaceous sediments and are located in the coastal cliffs and the beach area of the Volga river. Septaria consist mainly of calcite — 89 wt. %. Aluminosilicates, quartz, pyrite, fer...
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| Format: | Article |
| Language: | Russian |
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Sergo Ordzhonikidze Russian State University for Geological Prospecting
2019-05-01
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| Series: | Известия высших учебных заведений: Геология и разведка |
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| Online Access: | https://www.geology-mgri.ru/jour/article/view/390 |
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| author | D. A. Petrochenkov |
| author_facet | D. A. Petrochenkov |
| author_sort | D. A. Petrochenkov |
| collection | DOAJ |
| description | Septaria of the Ulyanovsk region are high-quality jewelry and ornamental material. Septaria are associated with lower Cretaceous sediments and are located in the coastal cliffs and the beach area of the Volga river. Septaria consist mainly of calcite — 89 wt. %. Aluminosilicates, quartz, pyrite, ferric oxide, organic matter are present in small amounts. In the streaks of calcite the presence of the microinclusions of graphite, gold, layered aluminosilicates, vernadite, magnetite, and bacteria impregnated with iron oxide, has been established by electron microscopic analysis. Calcite streaks of the septaria have a wide range of colors and textures. The color of calcite is influenced by the admixture of Fe and Mn. The contents of radioactive and carcinogenic elements are close to the background. |
| format | Article |
| id | doaj-art-ed5e2b33890c45128ea0a2b24c30c40d |
| institution | Kabale University |
| issn | 0016-7762 2618-8708 |
| language | Russian |
| publishDate | 2019-05-01 |
| publisher | Sergo Ordzhonikidze Russian State University for Geological Prospecting |
| record_format | Article |
| series | Известия высших учебных заведений: Геология и разведка |
| spelling | doaj-art-ed5e2b33890c45128ea0a2b24c30c40d2025-08-20T03:42:39ZrusSergo Ordzhonikidze Russian State University for Geological ProspectingИзвестия высших учебных заведений: Геология и разведка0016-77622618-87082019-05-0102212710.32454/0016-7762-2019-2-21-27359Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk regionD. A. Petrochenkov0Russian state geological prospecting universitySeptaria of the Ulyanovsk region are high-quality jewelry and ornamental material. Septaria are associated with lower Cretaceous sediments and are located in the coastal cliffs and the beach area of the Volga river. Septaria consist mainly of calcite — 89 wt. %. Aluminosilicates, quartz, pyrite, ferric oxide, organic matter are present in small amounts. In the streaks of calcite the presence of the microinclusions of graphite, gold, layered aluminosilicates, vernadite, magnetite, and bacteria impregnated with iron oxide, has been established by electron microscopic analysis. Calcite streaks of the septaria have a wide range of colors and textures. The color of calcite is influenced by the admixture of Fe and Mn. The contents of radioactive and carcinogenic elements are close to the background.https://www.geology-mgri.ru/jour/article/view/390jewelry and ornamental materialseptariacalcitelower cretaceous sedimentsulyanovsk region |
| spellingShingle | D. A. Petrochenkov Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region Известия высших учебных заведений: Геология и разведка jewelry and ornamental material septaria calcite lower cretaceous sediments ulyanovsk region |
| title | Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region |
| title_full | Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region |
| title_fullStr | Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region |
| title_full_unstemmed | Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region |
| title_short | Gemological characteristics of jewelry-ornamental septaria of the Ulyanovsk region |
| title_sort | gemological characteristics of jewelry ornamental septaria of the ulyanovsk region |
| topic | jewelry and ornamental material septaria calcite lower cretaceous sediments ulyanovsk region |
| url | https://www.geology-mgri.ru/jour/article/view/390 |
| work_keys_str_mv | AT dapetrochenkov gemologicalcharacteristicsofjewelryornamentalseptariaoftheulyanovskregion |