Metamorphism of Precambrian Granitic Xenoliths in a Mica Peridotite at Rose Dome, Woodson County, Kansas: Part 2, Petrologic and Mineralogic Studies

Abstract

Research Article| October 01, 1971 Metamorphism of Precambrian Granitic Xenoliths in a Mica Peridotite at Rose Dome, Woodson County, Kansas: Part 2, Petrologic and Mineralogic Studies PAUL C FRANKS; PAUL C FRANKS Department of Geology, New York University, Washington Square, New York, New York 10003 PRESENT ADDRESS (FRANKS): DEPARTMENT OF GEOLOGY, THE UNIVERSITY OF AKRON, AKRON, OHIO 44304 Search for other works by this author on: GSW Google Scholar M. E BICKFORD; M. E BICKFORD Department of Geology, New York University, Washington Square, New York, New York 10003 Search for other works by this author on: GSW Google Scholar HOLLY C WAGNER HOLLY C WAGNER U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar Author and Article Information PAUL C FRANKS PRESENT ADDRESS (FRANKS): DEPARTMENT OF GEOLOGY, THE UNIVERSITY OF AKRON, AKRON, OHIO 44304 Department of Geology, New York University, Washington Square, New York, New York 10003 M. E BICKFORD Department of Geology, New York University, Washington Square, New York, New York 10003 HOLLY C WAGNER U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Publisher: Geological Society of America Received: 22 Feb 1971 Revision Received: 20 May 1971 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1971, The Geological Society of America, Inc. Copyright is not claimed on any material prepared by U.S. government employees within the scope of their employment. GSA Bulletin (1971) 82 (10): 2869–2890. https://doi.org/10.1130/0016-7606(1971)82[2869:MOPGXI]2.0.CO;2 Article history Received: 22 Feb 1971 Revision Received: 20 May 1971 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation PAUL C FRANKS, M. E BICKFORD, HOLLY C WAGNER; Metamorphism of Precambrian Granitic Xenoliths in a Mica Peridotite at Rose Dome, Woodson County, Kansas: Part 2, Petrologic and Mineralogic Studies. GSA Bulletin 1971;; 82 (10): 2869–2890. doi: https://doi.org/10.1130/0016-7606(1971)82[2869:MOPGXI]2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Field, drill-core, petrographic, and mineralogic studies show that the Precambrian granitic rocks exposed on Rose Dome, Woodson County, Kansas, were emplaced as inclusions of basement rock in a mica peridotite magma that intruded the Pennsylvanian section of Rose Dome during Late Cretaceous time. High temperatures of the alkaline ultramafic magma (probably greater than 800° C) led to metamorphism of the granitic inclusions and the formation of high sanidine and high albite from original microcline and albite. Contact metamorphic effects on country rock include the development of buchite-like sanidine-magnesian biotite hornfels from Weston Shale (Pennsylvanian) that was intruded by the mica peridotite.The high temperatures of the peridotite magma also led to partial melting of the granitic rocks; a quartzofeldspathic matrix shows volcanic textures and binds mineral and rock fragments together to produce the varied range of textures and structures of the granitic xenoliths. Partial melting of the granitic rocks accounts for those features that led earlier workers to conclude that the "granite" on Rose Dome had intruded the Pennsylvanian section. Those features included xenoliths of hornfels enclosed by granitic material and apparently intrusive relationships between the granitic rocks and metamorphosed shale. The lack of concordance in the Rb-Sr ages of the granitic rocks (Part 1) may stem partly from melting of the "granite" and exchange of ions with the mica peridotite magma, from the "sampling" of different levels of granitic crust by the upwelling peridotite magma, or from weathering. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.