Metamorphic origin of the Coeur d'Alene base- and precious-metal veins in the Belt basin, Idaho and Montana

Research Article| February 01, 1988 Metamorphic origin of the Coeur d'Alene base- and precious-metal veins in the Belt basin, Idaho and Montana D. L. Leach; D. L. Leach 1U.S. Geological Survey, M.S. 973, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar G. P. Landis; G. P. Landis 1U.S. Geological Survey, M.S. 973, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar A. H. Hofstra A. H. Hofstra 1U.S. Geological Survey, M.S. 973, Box 25046, Federal Center, Denver, Colorado 80225 Search for other works by this author on: GSW Google Scholar Geology (1988) 16 (2): 122–125. https://doi.org/10.1130/0091-7613(1988)016<0122:MOOTCD>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation D. L. Leach, G. P. Landis, A. H. Hofstra; Metamorphic origin of the Coeur d'Alene base- and precious-metal veins in the Belt basin, Idaho and Montana. Geology 1988;; 16 (2): 122–125. doi: https://doi.org/10.1130/0091-7613(1988)016<0122:MOOTCD>2.3.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 SocietyGeology Search Advanced Search Abstract Fluid inclusions, geochronology, and field studies show that the world-class base- and precious-metal veins of the Coeur d'Alene district, Idaho and Montana, are the product of deformation coupled with regional metamorphism of the Belt basin around 850 Ma. Fluid-inclusion data show that the mineralizing solutions were complex CO2-CH4-CnHm-N2-H2O-NaCl fluids that changed in composition from CH4-CnHm-rich fluids in the older Zn-rich veins to CO2-rich fluids in the younger Ag-rich veins. Ore deposition occurred at about 250 to 350 °C and at pressures in excess of 1 kbar. 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.