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Isotopic composition of lead and Precambrian mineralization of the Coeur d'Alene district, Idaho

1960; Volume: 55; Issue: 4 Linguagem: Inglês

10.2113/gsecongeo.55.4.645

1554-0774

Austin Long, Ann‐Judith Silverman, J. Laurence Kulp,

Geology and Paleoclimatology Research

Other| June 01, 1960 Isotopic composition of lead and Precambrian mineralization of the Coeur d'Alene district, Idaho Austin Long; Austin Long Search for other works by this author on: GSW Google Scholar A. J. Silverman; A. J. Silverman Search for other works by this author on: GSW Google Scholar J. L. Kulp J. L. Kulp Search for other works by this author on: GSW Google Scholar Author and Article Information Austin Long A. J. Silverman J. L. Kulp Publisher: Society of Economic Geologists First Online: 02 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 GeoRef, Copyright 2008, American Geological Institute. Reference includes data from Bibliography and Index of North American Geology, U. S. Geological Survey, Reston, VA, United States Economic Geology (1960) 55 (4): 645–658. https://doi.org/10.2113/gsecongeo.55.4.645 Article history First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Austin Long, A. J. Silverman, J. L. Kulp; Isotopic composition of lead and Precambrian mineralization of the Coeur d'Alene district, Idaho. Economic Geology 1960;; 55 (4): 645–658. doi: https://doi.org/10.2113/gsecongeo.55.4.645 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 SocietyEconomic Geology Search Advanced Search Abstract Galena samples representing the vertical and geographical extent of the Coeur d'Alene mining district have been isotopically analyzed for Pb. The isotopic composition is essentially uniform at Pb 2O6 /Pb 2O4 = 16.44, Pb 2O7 /Pb 2O4 = 15.58, Pb 2O8 /Pb 2O4 = 36.52. The common Pb age from this average is about 1,400 million years. This is consistent with other isotope data in the district and may be considered the time of primary mineralization. The original Belt series and its metamorphic equivalents are, therefore, older than 1,400 m.y. Precambrian Pb in veinlets cutting Laramide monzonite dikes and stocks present positive evidence for sulfide remobilization in Tertiary time in the vicinity of these igneous intrusions. Some minor rock Pb was also introduced as galena during this event. 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.