Determination and interpretation of intensive parameters of Itatiaia Alkaline Massif, Brazil

• Grant number: 15/19974-0
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: November 05, 2015
• End date: January 07, 2016
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Excelso Ruberti
• Grantee: Pedro Augusto da Silva Rosa
• Supervisor: Michael Marks
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Institution abroad: Eberhard Karls Universität Tübingen, Germany
• Associated to the scholarship: 12/19184-1 - Geology and Petrogenic Evolution of Itatiaia Alkaline Massif, MG-RJ, BP.DR

Abstract

Geothermobarometry is an important tool to study intensive parameters of igneous rocks and understanding crystallization conditions, evolution and emplacement of magmas. Physical conditions such as temperature, pressure, oxygen fugacity, silica activity, NaCl activity can be rebuilt with the identification and chemical analysis of the magmatic paragenesis. The determination of these parameters in alkaline rocks is especially difficult, due to the lack of ideal paragenesis (e.g. quartz, ilmenite and magnetite may be missing) for calculation with the common geothermobarometers.Dr. Michael Marks and his research group are among the main researchers of the world that work with intensive parameters and phase equilibria of alkaline rocks, studding on classics alkaline complex, such as the Ilímaussaq in Greenland, Tamazeght in Morocco and Mont Saint-Hilaire in Canada. They have many published papers in several important geological journals. Therefore, a research internship with Dr. Michael Marks will be an important contribution to the development of this PhD project. The internship will be focused on the chemical analyses of specific textures with the objective of identifying the intensive parameters (temperature, oxygen fugacity, silica activity and NaCl activity) of different rock types from Itatiaia Alkaline Massif. The interpretation of the obtained results and their connection with the regional magmatism will result in diverse scientific papers that will be submitted to international geological journals.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DA SILVA ROSA, PEDRO AUGUSTO; RUBERT, EXCELSO. Nepheline syenites to syenites and granitic rocks of the Itatiaia Alkaline Massif, Southeastern Brazil: new geological insights into a migratory ring Complex. BRAZILIAN JOURNAL OF GEOLOGY, v. 48, n. 2, p. 347-372, APR-JUN 2018. (12/19184-1, 12/06082-6, 15/19974-0)

DA SILVA ROSA, PEDRO AUGUSTO; RUBERT, EXCELSO. Nepheline syenites to syenites and granitic rocks of the Itatiaia Alkaline Massif, Southeastern Brazil: new geological insights into a migratory ring Complex. BRAZILIAN JOURNAL OF GEOLOGY, v. 48, n. 2, p. 26-pg., 2018-04-01. (12/06082-6, 12/19184-1, 15/19974-0)