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    GEOLOGICAL ANALYSIS OF APLITE DIKES, TEXAS CANYON STOCK, ARIZONA

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    Author
    HARDIN, JUSTIN O’LEE
    Issue Date
    2016
    Advisor
    Davis, George
    
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    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    An area of the Texas Canyon stock near Dragoon, Arizona, containing exposures of aplite dikes (thin, resistant, fine crystalline intrusions) (Wells and Bishop, 1954), was scouted and geologically mapped in order to find the extent and character of a dike swarm located in that area. A sample of the aplite material was collected to be studied with geochronology techniques to determine its age, to serve as a guide to interpret the timing of the development of the fracture pattern in the granite, with the orientations of the aplite dikes studied in mind. The dikes in the swarm were found to dip steeply (70⁰ to 90⁰); the overwhelming majority had strikes roughly east-northeast, which is the same direction the swarm itself is aligned. The swarm was found to be approximately 580 meters in north-south length and 76 meters in east-west width, with an average dike thickness of 5-15 centimeters. The results of geochronology on the aplite revealed that the date of its intrusion (as well as the fracture pattern in the granite filled by aplite) is approximately 56.3 million years ago. This knowledge will be useful in the understanding of other plutons in the region that show the same patterns.
    Type
    text
    Electronic Thesis
    Degree Name
    B.S.
    Degree Level
    Bachelors
    Degree Program
    Honors College
    Geosciences
    Degree Grantor
    University of Arizona
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    Honors Theses

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