Petrochemical features of tholeiites from the Shaka ridge (South Atlantic)
The article presents original data of chemical composition of tholeiitic basaltoids and andesites, dredged from the Shaka Ridge (South Atlantic) in the course of field research in spring 2016 on the scientific expedition vessel “Akademik Fedorov”. The analytical part of the work on estimating the co...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Saint-Petersburg Mining University
2021-06-01
|
| Series: | Записки Горного института |
| Subjects: | |
| Online Access: | https://pmi.spmi.ru/index.php/pmi/article/view/14497?setLocale=en_US |
| _version_ | 1797947238375227392 |
|---|---|
| author | Natalia А. Rumyantseva Boris G. Vanshteyn Sergey G. Skublov |
| author_facet | Natalia А. Rumyantseva Boris G. Vanshteyn Sergey G. Skublov |
| author_sort | Natalia А. Rumyantseva |
| collection | DOAJ |
| description | The article presents original data of chemical composition of tholeiitic basaltoids and andesites, dredged from the Shaka Ridge (South Atlantic) in the course of field research in spring 2016 on the scientific expedition vessel “Akademik Fedorov”. The analytical part of the work on estimating the contents of petrogenic, trace and rare-earth elements was carried out using the classical method (“wet chemistry”), X-ray fluorescence analysis (XRF) and inductively coupled plasma mass spectrometry (ICP-MS). The studied samples demonstrate elevated concentrations of large-ion lithophile elements, or LILE, (Ba, Rb, Pb) and light rare earth elements, or LREE, (La, Ce, Nd, Sm) relative to high field strength elements, or HFSE, (Nb, Ta) and heavy rare earth elements, or HREE, (Dy, Yb, Lu). The specifics of trace element geochemistry suggest a significant contribution of crustal or subduction components to the magmas of the Shaka Ridge. Discrimination diagrams of basaltoids and allied rocks with fields of different geodynamic settings indicate that they were formed in the setting of the mid-ocean ridge basalt (MORB). The reason behind the appearance of subduction and crustal marks in the rocks is possibly associated with assimilation of crustal matter by magmas or lies in their inheritance from the mantle source. |
| first_indexed | 2024-04-10T21:23:35Z |
| format | Article |
| id | doaj.art-0f2e9f2c19b54264a7d627e7811b99a2 |
| institution | Directory Open Access Journal |
| issn | 2411-3336 2541-9404 |
| language | English |
| last_indexed | 2024-04-10T21:23:35Z |
| publishDate | 2021-06-01 |
| publisher | Saint-Petersburg Mining University |
| record_format | Article |
| series | Записки Горного института |
| spelling | doaj.art-0f2e9f2c19b54264a7d627e7811b99a22023-01-20T02:04:53ZengSaint-Petersburg Mining UniversityЗаписки Горного института2411-33362541-94042021-06-0124822323110.31897/PMI.2021.2.614497Petrochemical features of tholeiites from the Shaka ridge (South Atlantic)Natalia А. Rumyantseva0https://orcid.org/0000-0002-1173-4101Boris G. Vanshteyn1https://orcid.org/0000-0003-3460-741XSergey G. Skublov2https://orcid.org/0000-0002-5227-4260Academician I.S.Gramberg All-Russia Scientific Research Institute for Geology and Mineral Resources of the OceanAcademician I.S.Gramberg All-Russia Scientific Research Institute for Geology and Mineral Resources of the OceanSaint Petersburg Mining UniversityThe article presents original data of chemical composition of tholeiitic basaltoids and andesites, dredged from the Shaka Ridge (South Atlantic) in the course of field research in spring 2016 on the scientific expedition vessel “Akademik Fedorov”. The analytical part of the work on estimating the contents of petrogenic, trace and rare-earth elements was carried out using the classical method (“wet chemistry”), X-ray fluorescence analysis (XRF) and inductively coupled plasma mass spectrometry (ICP-MS). The studied samples demonstrate elevated concentrations of large-ion lithophile elements, or LILE, (Ba, Rb, Pb) and light rare earth elements, or LREE, (La, Ce, Nd, Sm) relative to high field strength elements, or HFSE, (Nb, Ta) and heavy rare earth elements, or HREE, (Dy, Yb, Lu). The specifics of trace element geochemistry suggest a significant contribution of crustal or subduction components to the magmas of the Shaka Ridge. Discrimination diagrams of basaltoids and allied rocks with fields of different geodynamic settings indicate that they were formed in the setting of the mid-ocean ridge basalt (MORB). The reason behind the appearance of subduction and crustal marks in the rocks is possibly associated with assimilation of crustal matter by magmas or lies in their inheritance from the mantle source.https://pmi.spmi.ru/index.php/pmi/article/view/14497?setLocale=en_USshaka ridgesouth atlanticgeochemistrytholeiitic basaltscontamination |
| spellingShingle | Natalia А. Rumyantseva Boris G. Vanshteyn Sergey G. Skublov Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) Записки Горного института shaka ridge south atlantic geochemistry tholeiitic basalts contamination |
| title | Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) |
| title_full | Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) |
| title_fullStr | Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) |
| title_full_unstemmed | Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) |
| title_short | Petrochemical features of tholeiites from the Shaka ridge (South Atlantic) |
| title_sort | petrochemical features of tholeiites from the shaka ridge south atlantic |
| topic | shaka ridge south atlantic geochemistry tholeiitic basalts contamination |
| url | https://pmi.spmi.ru/index.php/pmi/article/view/14497?setLocale=en_US |
| work_keys_str_mv | AT nataliaarumyantseva petrochemicalfeaturesoftholeiitesfromtheshakaridgesouthatlantic AT borisgvanshteyn petrochemicalfeaturesoftholeiitesfromtheshakaridgesouthatlantic AT sergeygskublov petrochemicalfeaturesoftholeiitesfromtheshakaridgesouthatlantic |