Title

Analog Modeling of Tectonic Rifting: Extensional Structures Based on Stress Margin Width

Presenter Information

Scott Melby

Department

Geosciences and Geological and Petroleum Engineering

Major

Geology/Geophysics

Research Advisor

Hogan, John Patrick

Advisor's Department

Geosciences and Geological and Petroleum Engineering

Abstract

It is observable that in regions where normal faulting has occurred, such as in basinand- range topography, grabens created by dropped blocks tend to be restricted in width, regardless of the distance between border faults. It is also notable that these rifts tend to be sub-parallel, and form a reticulated pattern over large areas. In our analog “sandbox experiment,” we will be replicating rift zones of various widths, and analyzing the formation and orientation of horst and graben features. Previous experiments have shown remarkably analogous results by varying rheology and thickness of strata materials. By modifying the width-to-depth ratio of the extentional zone, we expect to see multiple basin sets, and will study orientational relationships between horst margins.

Biography

Scott Melby is a junior at Missouri S&T, majoring in Geology. As a non-traditional student, Scott commutes from Steelville, Missouri, where he keeps a hobby farm with his wife and three children. He has been working in the Remote Sensing Lab, and hopes to use this experience in field geology after graduation.

Research Category

Sciences

Presentation Type

Poster Presentation

Document Type

Poster

Location

Upper Atrium/Hallway

Presentation Date

07 Apr 2010, 9:00 am - 11:45 am

Comments

Joint project with Trevor Ellis and Allen Hooper

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Apr 7th, 9:00 AM Apr 7th, 11:45 AM

Analog Modeling of Tectonic Rifting: Extensional Structures Based on Stress Margin Width

Upper Atrium/Hallway

It is observable that in regions where normal faulting has occurred, such as in basinand- range topography, grabens created by dropped blocks tend to be restricted in width, regardless of the distance between border faults. It is also notable that these rifts tend to be sub-parallel, and form a reticulated pattern over large areas. In our analog “sandbox experiment,” we will be replicating rift zones of various widths, and analyzing the formation and orientation of horst and graben features. Previous experiments have shown remarkably analogous results by varying rheology and thickness of strata materials. By modifying the width-to-depth ratio of the extentional zone, we expect to see multiple basin sets, and will study orientational relationships between horst margins.