[TAMAZON] TAMAZON - Trans-Amazon Drilling Project

Trans-Amazon Drilling Project: History of the Neotropical Rain Forest

ICDP-Topics:
Climate & Ecosystems


Year of Application: 2017

Expedition ID: 99999

Current Status: workshop done

amazon
biodiversity
brazil
central atlantic magnetic province
ICDP-2017/01
microbiology
rain forest
south america
TRANSAMAZON
Master Data

Dr. Jens Kallmeyer (First-PI)

Dr. Enno Schefuß (PI)

Projektstart:
Projektdauer:
Geologisches Alter: Cenozoic

Latitude: 0°25'41''N
Kontinente:

South America

Regionen & Städte:

Andes
Amazonas

Longitude: 49°33'40''W
Länder:

Brazil

Themen:

continental
lake
soft sediment

Drilling Data

Drilling Depth:
Core Yield:
Core Length:
Amount of Drill Holes:
Amount of Drill Locations:

Core Length-Drill Depth-Ratio:
Core Yield-Core Length-Ratio:

Description

The Amazon/Andes of tropical South America is a key region on Earth, and its rainforests host over half of all terrestrial plant species. The forests and their biota have evolved together with the physical landscape, closely linking processes in the Earth's interior with surface climate and landscapes, ecosystems, and biodiversity. The proposed Trans-Amazon Drilling Project will address fundamental questions about the geologic and biotic evolution of the Amazon, focusing on (1) how Cenozoic climate and geologic history, including uplift of the Andes and development of the Amazon fluvial system, influenced the origins of the Amazon rainforest and its incomparable biodiversity; and (2) the origin of the Amazonian “Pentecaua” diabase sills, one of Earth’s largest intrusive complexes, and the impacts of this intrusion on the atmospheric gas composition and mass extinction at the Triassic/Jurassic boundary. These goals require long sedimentary records, which, in most of the Amazon region, can only be obtained by drilling. We propose to drill the entire Cenozoic sequence in five continental sites in four different ancient sedimentary basins that are aligned along the modern Amazon River and that transect the entire near-equatorial Amazon region of Brazil, from the Andean foreland to the Atlantic Ocean. The transect of sites is essential for distinguishing basin-wide and continental-scale patterns of climate, landscape, and biotic evolution; evaluating questions about west-to-east gradients and hydrologic connectivity; and correlating the continental strata with a site dated using marine biostratigraphy. In addition, in the Amazonas and Solimões Basins, we propose to drill both the Cenozoic sedimentary sequence and the entire 1100-1200 m thick underlying diabase sequence along with its interbedded host meta-sediments. Drill sites have been chosen that are all near large navigable rivers of the Amazon or roads that are easily accessible from these rivers. This transect, coupled with proposed IODP sites on the Amazon continental margin, will span 40oW to 73oW, thus encircling nearly 10% of Earth’s equatorial circumference. We believe that this work will provide transformative understanding of Amazonian geological and biotic evolution that addresses important and long-standing questions about the linkages between the geophysical environment and its biotic history.