Title

Confining the Date of the Decaturville Structure

Presenter Information

Tyler Sundell

Department

Geosciences and Geological and Petroleum Engineering

Major

Geology and Geophysics

Research Advisor

Hogan, John Patrick
Chapman, Alan D.

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Funding Source

OURE

Abstract

The Decaturville Structure on Highway 5 in Missouri was established as a meteor impact site in 1979 by a USGS study funded by NASA. While this report di give an age range, the range was about 250 million years. By using Apatite-He thermochronology, which looks at the decay of U/Th into He inside the apatite minerals. The purpose of this study is to: find a new age range, add more evidence to the theory of Decaturville being an impact site, and to test the above method for dating craters. One of the features of an impact site is an uplifted block at the center, similar to rain drops hitting a still surface. This uplifted block was displaced nearly 300m at Decatureville and exposed tourmaline schist and pegmatitic granite. While these rocks where being displaced, the apatite minerals passed through their blocking temperature and started the clock by trapping He.

Biography

Tyler Sundell is a senior in Geology and Geophysics at Missouri S&T whom is interested in planetary geology. He attended High School in Waynesville Missouri, graduating in May 2012. His extracurricular activities include: volunteering at Truman Elementary’s Outdoor Classroom, Rolla Apartments retirement home, hiking, and reading.

Research Category

Research Proposals

Presentation Type

Poster Presentation

Document Type

Poster

Award

Research proposal poster session, First place

Location

Upper Atrium/Hall

Presentation Date

15 Apr 2015, 1:00 pm - 3:00 pm

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Apr 15th, 1:00 PM Apr 15th, 3:00 PM

Confining the Date of the Decaturville Structure

Upper Atrium/Hall

The Decaturville Structure on Highway 5 in Missouri was established as a meteor impact site in 1979 by a USGS study funded by NASA. While this report di give an age range, the range was about 250 million years. By using Apatite-He thermochronology, which looks at the decay of U/Th into He inside the apatite minerals. The purpose of this study is to: find a new age range, add more evidence to the theory of Decaturville being an impact site, and to test the above method for dating craters. One of the features of an impact site is an uplifted block at the center, similar to rain drops hitting a still surface. This uplifted block was displaced nearly 300m at Decatureville and exposed tourmaline schist and pegmatitic granite. While these rocks where being displaced, the apatite minerals passed through their blocking temperature and started the clock by trapping He.