THE ALUMINIUM SATURATION INDEX AND THE MgO/Ti02 RATIO: TWO PARAMETERS INFLUENCED BY PH20 AND THEIR USE TO DISCRIMINATE MAGMA SERIES
THE ALUMINIUM SATURATION INDEX AND THE MgO/Ti02 RATIO: TWO PARAMETERS INFLUENCED BY PH20 AND THEIR USE TO DISCRIMINATE MAGMA SERIES
| dc.contributor | en-US | |
| dc.contributor | pt-BR | |
| dc.creator | BILAL, ESSAID | |
| dc.creator | GIRET, ANDRÉ | |
| dc.date | 2017-05-12 | |
| dc.date.accessioned | 2023-06-19T16:32:50Z | |
| dc.date.available | 2023-06-19T16:32:50Z | |
| dc.identifier | https://ppegeo.igc.usp.br/index.php/rbg/article/view/11137 | |
| dc.identifier.uri | https://repositorioslatinoamericanos.uchile.cl/handle/2250/6693839 | |
| dc.description | The Aluminum Saturation Index is related to the MgO/TiO2 ratio and both may be added to other typological parameters commonly used in the granitic series discrimination. Some well-known examples are listed and they lead to propose new geochemical limits characterizing different geodynamic settings. Four main groups may be recognized, 1: calc-alkaline granitoids (high Ca and low K) together with the island arc tholeiitic granitoids (ASI=1 for MgO=1.8% and MgO/TiO2 =2); 2: crustal peraluminous granitoids (ASI>1 and MgO/TiO2 = 3) produced in the collision zones; 3: tardi- and post-collision (K calc-alkaline) granitoids (ASI=1 for MgO=3.7% and MgO/TiO2 =4) and 4: the alkaline and peralkaline granitoids and the mid-ocean ridge tholeiitic granitoids emplaced in rifting or doming zones (ASI=1 for MgO=0.8% and MgO/TiO2=l). | en-US |
| dc.description | The Aluminum Saturation Index is related to the MgO/TiO2 ratio and both may be added to other typological parameters commonly used in the granitic series discrimination. Some well-known examples are listed and they lead to propose new geochemical limits characterizing different geodynamic settings. Four main groups may be recognized, 1: calc-alkaline granitoids (high Ca and low K) together with the island arc tholeiitic granitoids (ASI=1 for MgO=1.8% and MgO/TiO2 =2); 2: crustal peraluminous granitoids (ASI>1 and MgO/TiO2 = 3) produced in the collision zones; 3: tardi- and post-collision (K calc-alkaline) granitoids (ASI=1 for MgO=3.7% and MgO/TiO2 =4) and 4: the alkaline and peralkaline granitoids and the mid-ocean ridge tholeiitic granitoids emplaced in rifting or doming zones (ASI=1 for MgO=0.8% and MgO/TiO2=l). | pt-BR |
| dc.format | application/pdf | |
| dc.language | eng | |
| dc.publisher | Sociedade Brasileira de Geologia | pt-BR |
| dc.relation | https://ppegeo.igc.usp.br/index.php/rbg/article/view/11137/10594 | |
| dc.rights | Direitos autorais 2017 Revista Brasileira de Geociências | pt-BR |
| dc.source | Revista Brasileira de Geociências; v. 29, n. 1 (1999): Selected Papers of the II International Symposium on Granites and Related Mineralizations - ISGAM - Salvador 1997; 55-58 | en-US |
| dc.source | Revista Brasileira de Geociências; v. 29, n. 1 (1999): Selected Papers of the II International Symposium on Granites and Related Mineralizations - ISGAM - Salvador 1997; 55-58 | es-ES |
| dc.source | Revista Brasileira de Geociências; v. 29, n. 1 (1999): Selected Papers of the II International Symposium on Granites and Related Mineralizations - ISGAM - Salvador 1997; 55-58 | pt-BR |
| dc.source | 0375-7536 | |
| dc.subject | Granitoid; Peraluminous; Calc-alkaline; Peralkaline; Geodynamic settings; ASI; MgO/TiO2. | en-US |
| dc.subject | Granitoid; Peraluminous; Calc-alkaline; Peralkaline; Geodynamic settings; ASI; MgO/TiO2. | pt-BR |
| dc.title | THE ALUMINIUM SATURATION INDEX AND THE MgO/Ti02 RATIO: TWO PARAMETERS INFLUENCED BY PH20 AND THEIR USE TO DISCRIMINATE MAGMA SERIES | en-US |
| dc.title | THE ALUMINIUM SATURATION INDEX AND THE MgO/Ti02 RATIO: TWO PARAMETERS INFLUENCED BY PH20 AND THEIR USE TO DISCRIMINATE MAGMA SERIES | pt-BR |
| dc.type | info:eu-repo/semantics/article | |
| dc.type | info:eu-repo/semantics/publishedVersion | |
| dc.type | pt-BR |