ORIGIN OF THE CORUNDUM DEPOSITS OF RENFREW COUNTY, ONTARIO, CANADA

Abstract

Research Article| December 01, 1957 ORIGIN OF THE CORUNDUM DEPOSITS OF RENFREW COUNTY, ONTARIO, CANADA H. D CARLSON H. D CARLSON DEPARTMENT OF GEOLOGY, UNIVERSITY OF SOUTH DAKOTA, VERMILLION, S. D. Search for other works by this author on: GSW Google Scholar Author and Article Information H. D CARLSON DEPARTMENT OF GEOLOGY, UNIVERSITY OF SOUTH DAKOTA, VERMILLION, S. D. Publisher: Geological Society of America Received: 18 Feb 1955 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Copyright © 1957, 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 (1957) 68 (12): 1605–1636. https://doi.org/10.1130/0016-7606(1957)68[1605:OOTCDO]2.0.CO;2 Article history Received: 18 Feb 1955 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation H. D CARLSON; ORIGIN OF THE CORUNDUM DEPOSITS OF RENFREW COUNTY, ONTARIO, CANADA. GSA Bulletin 1957;; 68 (12): 1605–1636. doi: https://doi.org/10.1130/0016-7606(1957)68[1605:OOTCDO]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 In Renfrew County corundum is erratically distributed through a banded complex of rocks rich in scapolite, andeclase, and nepheline but is more abundantly developed and uniformly distributed in contact zones between this banded complex and a younger hybrid alkaline syenite.The scapolite-andeclase-nepheline gneiss complex may have formed by (1) the metasomatic alteration of intercalated calcareous and aluminous metasediments, or (2) the intrusion of sill-like masses of an anorthositic magma into such metasediments. No positive evidence supporting either of these hypotheses was obtained in this study. In both hypotheses it is assumed that some corundum formed by the transformation of alumina-rich parts of the metasediments into corundum-bearing rock either by metasomatism or by magmatic assimilation.The hybrid alkaline syenite appears to have developed by metasomatism of the rocks of the earlier complex. In this process potassium and silica were added, and lime, soda, and alumina were released from the scapolite, andeclase, and nepheline rocks. Much of the corundum in the contact zones is attributed to the crystallization of some alumina released from the older rocks during the transformation into syenite. Some of this alumina may have migrated, with the hydrothermal solutions responsible for the metasomatism, to loci favorable for the development of corundum-rich pegmatitic facies of the hybrid alkaline syenite. This content is PDF only. Please click on the PDF icon to access. 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.