Restricted Research - Award List, Note/Discussion Page
Fiscal Year: 2023
1910 The University of Texas at El Paso (143798)
Principal Investigator: Chapman V,James Benjamin
Total Amount of Contract, Award, or Gift (Annual before 2011): $ 109,466
Exceeds $250,000 (Is it flagged?): No
Start and End Dates: 10/1/22 - 4/30/24
Restricted Research: YES
Academic Discipline: Earth, Environ & Resource Sci
Department, Center, School, or Institute: Earth, Environ & Resource Sci
Title of Contract, Award, or Gift: Collaborative Research: Internal and external drivers of orogenic episodicity in the Ecuadorian Andes
Name of Granting or Contracting Agency/Entity:
NATIONAL SCIENCE FOUNDATION
CFDA Link: NSF
47.050
Program Title:
Geosciences
CFDA Linked: Geosciences
Note:
This project seeks to understand the factors regulating episodicity (reoccurring tectonic phenomenon on the scale of 10s of millions of years) in volcanic arc magmatism, crustal thickening, and basin subsidence along Cordilleran (ocean-continent subduction) margins. The project examines the Cordillera in Ecuador, the narrowest segment of the Andes. The project focuses on the transition from rapid crustal shortening to tectonic quiescence, a singular event in the history of the Cordillera that occurred ~30 million years ago. Competing models make different predictions about what may have caused this period of tectonic quiescence. Robust geochronologic control, improved basin chronostratigraphy, and a sustained history of subduction provide rare access to the Andean stratigraphic and igneous record from the Pacific coast to Amazon foreland. A multidisciplinary investigation of sedimentary successions in the Ecuadorian forearc, hinterland, and foreland basins will address the timing of major shifts in sediment provenance and paleodrainage, enabled by four clearly distinguishable sediment source regions. The project analyzes sedimentary rocks and detrital minerals in these basins and combines the expertise of PI Chapman in geochemistry and petrology with PI Horton's expertise in sedimentary systems. The UTEP part of the project uses laser ablation (LA)-ICPMS analyses to determine the age, geochemistry, and isotopic composition of detrital minerals (e.g., zircon) to recognize variable phases of crustal thickening, volcanic arc migration, changes in magmatic source regions/processes, and the influence of different source rocks that are the source of the sediment.
Discussion: No discussion notes