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2009 Christensen-Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota

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Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota

2009 Christensen-Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota

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Title	Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota
GAC Student Author	Christensen, Ben
Description	The Virginia Horn refers to the structure where the outcrop pattern of the Biwabik Iron Formation makes a sharp bend southward and then back north as a part of a broad, gently plunging anticlinal and synclinal flexure, near the city of Virginia in northeastern Minnesota, exposing supracrustal rocks of Archean age within the core of the anticline. Three deformation events have affected these rocks (Jirsa and Boerboom 2003). Strain analysis on three graywacke samples from the area was performed in order to determine whether the small-scale structures present in the rocks are consistent with the megascopic structure. Specifically, the Rf/Ф phi method proved to be reliable and consistent when applied to these samples. The strain data show that graywackes from the area exhibit a degree of flattening consistent with the D2 deformation.
Date Original	2009
Type	Text
Format	application/pdf (portable document)
Language	English;
Rights Management	(c) student author
Department	Geology Department
Faculty Supervisor	Welsh, James
Publication Type	Thesis
Date Online	2017-06-02

Description

Title	2009 Christensen-Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota
Type	Text
Format	application/pdf (portable document)
Language	English;
Rights Management	(c) student author
Department	Geology Department
Publication Type	Thesis
Date Online	2017-06-02

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Strain Analysis of Archean Rocks from the Virginia Horn Area, NE Minnesota

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Strain Analysis of Archean Rocks from the Virginia Horn...

Strain Analysis of Archean Rocks from the Virginia Horn...