Petrography and petrogenetic history of a quartz monzonite intrusive, Swisshelm Mountains, Cochise County, Arizona

Diery, Hassan Deeb, 1934-

dc.contributor.author	Diery, Hassan Deeb, 1934-
dc.creator	Diery, Hassan Deeb, 1934-	en
dc.date.accessioned	2015-05-01T09:44:27Z	en
dc.date.available	2015-05-01T09:44:27Z	en
dc.date.issued	1964	en
dc.identifier.uri	http://hdl.handle.net/10150/551749	en
dc.description.abstract	The Swisshelm Quartz Monsonite covers about two square miles on the western slope of the Swisshelm Mountains, Cochise County, Arizona. Field observation and petrographic study indicate that the quartz monsonite was derived by differentiation and late-stage alkali metasomation of probably a quartz dioritic magma rich in alkali and volatile constituents. The high concentration of the volatiles is believed to be of great importance in the development of the different facies and rock types. Four different facies of the Swisshelm Quartz Monsonite have been distinguished as (1) the normal facies, (2) the altered facies, (3) the fine-grained facies, and (4) the contact facies. Also, several aplite dikes, local beryl-bearing pegmatite patches, and numerous quartz veins are present and attributed to late magmatic differentiation. Inclusions of an early and late magmatic facies are sparcely disseminated through the quartz monsonite. The Swisshelm Quartz Monsonite magma has intruded and metamorphosed the Upper Paleozoic sediments of the Mace Group as well as the Lower Cretaceous sediments of the Bisbee Group. The metamorphism is of a contact metasomatic type to which the mineralogical and textural changes in the country rocks have been attributed.
dc.language.iso	en_US	en
dc.publisher	The University of Arizona.	en
dc.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.	en
dc.subject	Geology -- Arizona -- Cochise County.	en
dc.subject	Petrology -- Arizona -- Cochise County.	en
dc.subject	Swisshelm Mountains (Ariz.)	en
dc.subject	maps
dc.title	Petrography and petrogenetic history of a quartz monzonite intrusive, Swisshelm Mountains, Cochise County, Arizona	en
dc.type	text	en
dc.type	Thesis-Reproduction (electronic)	en
dc.type	maps
dc.identifier.oclc	28524499	en
thesis.degree.grantor	University of Arizona	en
thesis.degree.level	masters	en
thesis.degree.discipline	Graduate College	en
thesis.degree.name	M.S.	en
dc.description.note	This item was digitized from a paper original and/or a microfilm copy. If you need higher-resolution images for any content in this item, please contact us at repository@u.library.arizona.edu.	en
dc.identifier.bibrecord	.b28085802	en
dc.identifier.callnumber	E9791 1964 39	en
refterms.dateFOA	2018-09-01T21:07:14Z
html.description.abstract	The Swisshelm Quartz Monsonite covers about two square miles on the western slope of the Swisshelm Mountains, Cochise County, Arizona. Field observation and petrographic study indicate that the quartz monsonite was derived by differentiation and late-stage alkali metasomation of probably a quartz dioritic magma rich in alkali and volatile constituents. The high concentration of the volatiles is believed to be of great importance in the development of the different facies and rock types. Four different facies of the Swisshelm Quartz Monsonite have been distinguished as (1) the normal facies, (2) the altered facies, (3) the fine-grained facies, and (4) the contact facies. Also, several aplite dikes, local beryl-bearing pegmatite patches, and numerous quartz veins are present and attributed to late magmatic differentiation. Inclusions of an early and late magmatic facies are sparcely disseminated through the quartz monsonite. The Swisshelm Quartz Monsonite magma has intruded and metamorphosed the Upper Paleozoic sediments of the Mace Group as well as the Lower Cretaceous sediments of the Bisbee Group. The metamorphism is of a contact metasomatic type to which the mineralogical and textural changes in the country rocks have been attributed.