Modern terrigenous sediment sources and past changes in precipitation over tropical South America recorded in terrigenous sediments deposited in the western tropical Atlantic

• Grant number: 21/00853-0
• Support Opportunities: Scholarships in Brazil - Master
• Start date: April 01, 2021
• End date: June 30, 2023
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Cristiano Mazur Chiessi
• Grantee: Júlia Grigolato Iani
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 18/15123-4 - Past perspectives on tipping elements of the climate system: the Amazon Rainforest and the Atlantic Meridional Overturning Circulation (PPTEAM), AP.PFPMCG.JP2
• Associated scholarship(s): 22/07285-0 - Assessing the sources of terrigenous sediments deposited in the western equatorial Atlantic via ICP-OES analyses, BE.EP.MS

Abstract

A comprehensive calibration of proxies based on modern environmental conditions is of utmost importance for the appropriate interpretation of paleoenvironmental signals. In this project we will determine the major and minor elemental signature of modern sediments transported by the main tributaries of the Amazon River drainage basin and apply these signatures to assess past changes in precipitation over tropical South America. Therefore, we will analyze the major and minor elemental composition of modern fluvial suspended sediments and a marine sediment core from tropical South America and the western tropical Atlantic, respectively. By doing this, we will provide on the one hand an in-depth understanding about the geochemical signatures of the sources of terrigenous sediments deposited off NE South America, and on the other hand a high temporal resolution reconstruction of Amazonian hydroclimate changes for the last ca. 250 kyr. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

IANI, Júlia Grigolato. Modern terrigenous sediment sources and past changes in precipitation over tropical South America recorded in terrigenous sediments deposited in the western equatorial Atlantic. 2023. Master's Dissertation - Universidade de São Paulo (USP). Instituto de Geociências (IG/BT) São Paulo.