Iron Oxide Copper-Gold-type Polymetallic Mineralization in the Contact Lake Belt, Great Bear Magmatic Zone, Northwest Territories, Canada

Research Article| July 01, 2007 Iron Oxide Copper-Gold-type Polymetallic Mineralization in the Contact Lake Belt, Great Bear Magmatic Zone, Northwest Territories, Canada A.H. Mumin; A.H. Mumin † 1Department of Geology, Brandon University, Brandon, Manitoba, R7A 6A9. †Corresponding Author: E-mail: mumin@brandonu.ca Search for other works by this author on: GSW Google Scholar L. Corriveau; L. Corriveau 2Natural Resources Canada, Geological Survey of Canada, Québec, Québec, G1K 9A9. Search for other works by this author on: GSW Google Scholar A.K. Somarin; A.K. Somarin 1Department of Geology, Brandon University, Brandon, Manitoba, R7A 6A9. Search for other works by this author on: GSW Google Scholar L. Ootes L. Ootes 3Northwest Territories Geoscience Office, Box 1500, Yellowknife, Northwest Territories, X1A 1W1. Search for other works by this author on: GSW Google Scholar Exploration and Mining Geology (2007) 16 (3-4): 187–208. https://doi.org/10.2113/gsemg.16.3-4.187 Article history received: 02 Apr 2006 accepted: 14 Apr 2007 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation A.H. Mumin, L. Corriveau, A.K. Somarin, L. Ootes; Iron Oxide Copper-Gold-type Polymetallic Mineralization in the Contact Lake Belt, Great Bear Magmatic Zone, Northwest Territories, Canada. Exploration and Mining Geology 2007;; 16 (3-4): 187–208. doi: https://doi.org/10.2113/gsemg.16.3-4.187 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 SocietyExploration and Mining Geology Search Advanced Search Abstract The Contact Lake Belt forms the NW-trending flank of a collapsed andesite stratovolcano complex adjacent to a subvolcanic intrusion within the northern, 1.87 to 1.85 Ga, Great Bear magmatic zone, Northwest Territories, Canada. It belongs to the Port Radium-Echo Bay historical district that hosts past producers of U, Ag, Cu (± Ra, Ni, Co, Bi) from polymetallic sulfide and arsenide veins. A re-examination of the belt has revealed widespread IOCG-type polymetallic mineralization exposed in numerous veins, stockworks, breccias, and replacement zones within extensive areas of polyphase hydrothermal alteration. The effects are most visible and intense in andesite, but also affect associated synvolcanic intrusions. A weak, pervasive chlorite-epidote-carbonate-sericite alteration is observed in the least-altered volcanic rocks. Subsequent hydrothermal alteration that is progressively superimposed on earlier facies includes: sericitic (sericite, quartz); phyllic (sericite, quartz, pyrite); potassic (K feldspar); earthy and specular hematite; K feldspar-scapolite-albite-magnetite-actinolite-apatite as veins, stockwork, and pegmatitic recrystallization; K feldspar-tourmaline-Fe-oxide-silica-sulfides; and massive albitites locally laced with amphibole. Hydrothermal breccias and diatremes occur locally throughout the belt. The style, size, overprinting relationship, mineralogy, and chemical composition of alteration zones and mineralization support the current IOCG exploration model for polymetallic mineralization in the Contact Lake Belt, as well as for mineralization elsewhere in the Port Radium-Echo Bay district and the Great Bear magmatic zone overall. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.