Primary Sediment Production from Granitic Rocks in Southeastern Arizona

Persistent Link:
http://hdl.handle.net/10150/231212
Title:
Primary Sediment Production from Granitic Rocks in Southeastern Arizona
Author:
Acaba, Joseph Michael
Issue Date:
1992
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the Antevs Library, Department of Geosciences, and 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 or the department.
Collection Information:
This item is part of the Geosciences Theses collection. It was digitized from a physical copy provided by the Antevs Library, Department of Geosciences, University of Arizona. For more information about items in this collection, please email the Antevs Library, antevs@geo.arizona.edu.
Abstract:
Isolated granitic rock bodies (granites, granodiorites, quartz monzonites) in the vicinity of Benson in southeastern Arizona were studied to trace the behavior of rock weathering. Thin sections of fresh granites were examined to characterize the original mineralogy which consisted mainly of quartz, feldspars, and micas. The weathering products show up on the granites as grus and soil profiles as well as down slope in the basin deposits. X -ray diffraction studies of the < 2 micrometers fraction of the weathering products proved illite, smectite, illite-smectite mixed layer, and kaolinite to be the dominant clays; quartz and feldspar also persisted into this size fraction. Silt sized material produced similar results. The quartz monzonite of Texas Canyon afforded a special study of the initial weathering stages of feldspars and micas. In the < 2 micrometers fraction obtained from granitic material placed in an ultra sonic bath, the feldspars weathered to a Na-montmorillinite while biotite weathered to vermiculite.
Type:
text; Thesis-Reproduction (electronic)
Keywords:
Arizona; clay mineralogy; Arizona; Benson Arizona; biotite; clay mineralogy; clay minerals; Cochise County Arizona; feldspar group; framework silicates; grain size; granodiorites; igneous rocks; mica group; mineral composition; montmorillonite; plutonic rocks; quartz monzonite; sheet silicates; silicates; soil profiles; southeastern Arizona; Texas Canyon; United States; vermiculite; weathering; X-ray diffraction data
Degree Name:
M.S.
Degree Level:
masters
Degree Program:
Graduate College; Geosciences
Degree Grantor:
University of Arizona
Committee Chair:
Schreiber, Joseph F., Jr.

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