Title

The thickness and Poisson’s ratio of the Earth’s crust beneath the North Central US

Presenter Information

Yi Jiang

Department

Geosciences and Geological and Petroleum Engineering

Major

Geology and Geophysics

Research Advisor

Gao, Stephen S.

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Funding Source

Missouri University of Science and Technology Office of Undergraduate Studies

Abstract

The crustal thickness, structure, and composition have been disputed for decades. Major geological structures in the area include the Mid-Continent Rift (MCR) and the Black Hills batholiths. In this project, we largely improved the spatial resolution of the crustal thickness and Poisson’s ratio measurements in the region between N41 and N50 latitudes, and W90 and W110 longitudes by using receiver function method. The data we used is the broadband seismic data recorded by the USArray. In the region of the MCR we have established evidence for the original thinning of the crust and have provided evidence for the intrusion of mafic rocks and deposition of clastic sedimentary rocks which were responsible for the later crustal thickening. To the east a mid-crustal reflector can be identified at a depth of 20-30km. The Paleozoic sediments occur in most regions of the Superior Craton, Trans-Hudson Orogeny and Yavapai province.

Biography

Yi Jiang is a senior graduating in May 2014 with a degree in Geology/Geophysics. His emphasis has been in seismology and after graduation he plans to study the micro seismic in the hydraulic fracturing and earthquake trigger.

Research Category

Sciences

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hall

Presentation Date

16 Apr 2014, 9:00 am - 11:45 am

Comments

Joint project with Samantha Lucker

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Apr 16th, 9:00 AM Apr 16th, 11:45 AM

The thickness and Poisson’s ratio of the Earth’s crust beneath the North Central US

Upper Atrium/Hall

The crustal thickness, structure, and composition have been disputed for decades. Major geological structures in the area include the Mid-Continent Rift (MCR) and the Black Hills batholiths. In this project, we largely improved the spatial resolution of the crustal thickness and Poisson’s ratio measurements in the region between N41 and N50 latitudes, and W90 and W110 longitudes by using receiver function method. The data we used is the broadband seismic data recorded by the USArray. In the region of the MCR we have established evidence for the original thinning of the crust and have provided evidence for the intrusion of mafic rocks and deposition of clastic sedimentary rocks which were responsible for the later crustal thickening. To the east a mid-crustal reflector can be identified at a depth of 20-30km. The Paleozoic sediments occur in most regions of the Superior Craton, Trans-Hudson Orogeny and Yavapai province.