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SQUAW PEAK, ARIZONA: PALEOPROTEROZOIC PRECURSOR TO THE LARAMIDE PORPHYRY COPPER PROVINCE

2014; Volume: 109; Issue: 5 Linguagem: Inglês

10.2113/econgeo.109.5.1171

1554-0774

R. H. Sillitoe, Robert A. Creaser, R. R. Kern, M. H. Lenters,

earthquake and tectonic studies

Letter| August 01, 2014 SQUAW PEAK, ARIZONA: PALEOPROTEROZOIC PRECURSOR TO THE LARAMIDE PORPHYRY COPPER PROVINCE Richard H. Sillitoe; Richard H. Sillitoe † 127 West Hill Park, Highgate Village, London N6 6ND, England †Corresponding author: e-mail, aucu@compuserve.com Search for other works by this author on: GSW Google Scholar Robert A. Creaser; Robert A. Creaser 2Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada T2G 2E3 Search for other works by this author on: GSW Google Scholar Richard R. Kern; Richard R. Kern 3MinQuest, Inc., 4235 Christy Way, Reno, Nevada 89519 Search for other works by this author on: GSW Google Scholar Martin H. Lenters Martin H. Lenters 4BHP Billiton, Avenida Américo Vespucio 100, piso 8, Las Condes, Santiago, Chile Search for other works by this author on: GSW Google Scholar Author and Article Information Richard H. Sillitoe † 127 West Hill Park, Highgate Village, London N6 6ND, England Robert A. Creaser 2Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta, Canada T2G 2E3 Richard R. Kern 3MinQuest, Inc., 4235 Christy Way, Reno, Nevada 89519 Martin H. Lenters 4BHP Billiton, Avenida Américo Vespucio 100, piso 8, Las Condes, Santiago, Chile †Corresponding author: e-mail, aucu@compuserve.com Publisher: Society of Economic Geologists Received: 12 Oct 2013 Accepted: 03 Apr 2014 First Online: 09 Mar 2017 Online ISSN: 1554-0774 Print ISSN: 0361-0128 © 2014 Society of Economic Geologists. Economic Geology (2014) 109 (5): 1171–1177. https://doi.org/10.2113/econgeo.109.5.1171 Article history Received: 12 Oct 2013 Accepted: 03 Apr 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Richard H. Sillitoe, Robert A. Creaser, Richard R. Kern, Martin H. Lenters; SQUAW PEAK, ARIZONA: PALEOPROTEROZOIC PRECURSOR TO THE LARAMIDE PORPHYRY COPPER PROVINCE. Economic Geology 2014;; 109 (5): 1171–1177. doi: https://doi.org/10.2113/econgeo.109.5.1171 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 Re-Os dating of two molybdenite samples from the Squaw Peak porphyry copper-molybdenum prospect in central Arizona returned essentially identical ages of 1,729 ± 7 and 1,738 ± 7 Ma. Therefore the prospect is not a component of the Laramide (Late Cretaceous-early Tertiary) porphyry copper province of southwestern North America as previously presumed. These Paleoproterozoic ages are similar to that of 1,740 ± 15 Ma for the I-type, magnetite-series Cherry batholith, within which the Squaw Peak porphyry stock and associated mineralization are located. Squaw Peak cannot be more than a few million years younger than volcanogenic massive sulfide (VMS) copper deposits in the nearby Jerome district, which are part of the Yavapai Supergroup, host to the Cherry batholith. These volcanic and intrusive rocks and their associated copper mineralization were formed in a juvenile island-arc setting and are now part of the Yavapai province, which was assembled and accreted to the Archean nucleus of North America by ~1.68 Ga.The Paleoproterozoic age for Squaw Peak in conjunction with the existence of the slightly older VMS deposits shows that the Laramide province of southwestern North America first developed its copper metallogenic signature >1,700 m.y. ago. The presence of this Paleoproterozoic copper mineralization may be taken as further support for recently proposed metasomatism of the mantle lithosphere during Paleoproterozoic subduction as a precursor to formation of at least part of the Laramide porphyry copper province. Similar spatial associations between inferred metal sources in Proterozoic mantle lithosphere and lowermost crust, relatively minor copper and/or molybdenum mineralization in Proterozoic magmatic arcs, and important post-Paleozoic porphyry copper and/or molybdenum provinces have recently been documented elsewhere, particularly in eastern China, and could prove to be of more general exploration significance. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.