Title: Geochemical study of an early Paleozoic island-arc-back-arc basin system. Part 2: Eastern Klamath, early to middle Paleozoic island-arc volcanic rocks (northern California)
Abstract: Research Article| July 01, 1988 Geochemical study of an early Paleozoic island-arc-back-arc basin system. Part 2: Eastern Klamath, early to middle Paleozoic island-arc volcanic rocks (northern California) MARC BROUXEL; MARC BROUXEL 1Centre de Recherches Pétrographiques et Géochimiques, BP 20, 54501 Vandoeuvre-les-Nancy cedex, France2Laboratoire de Pétrologie, U.A. 735, Université de Nancy 1, BP 239, 54506 Vandceuvre-les-Nancy cedex, France Search for other works by this author on: GSW Google Scholar HENRIETTE LAPIERRE; HENRIETTE LAPIERRE 2Laboratoire de Pétrologie, U.A. 735, Université de Nancy 1, BP 239, 54506 Vandceuvre-les-Nancy cedex, France3Département des Sciences de la Terre, Université d'Orléans, 45046 Orléans cedex, France Search for other works by this author on: GSW Google Scholar ANNIE MICHARD; ANNIE MICHARD 1Centre de Recherches Pétrographiques et Géochimiques, BP 20, 54501 Vandoeuvre-les-Nancy cedex, France Search for other works by this author on: GSW Google Scholar FRANCIS ALBARÉDE FRANCIS ALBARÉDE 1Centre de Recherches Pétrographiques et Géochimiques, BP 20, 54501 Vandoeuvre-les-Nancy cedex, France4Ecole Nationale Supérieure de Géologie, 94 Avenue de-Lattre-de-Tassigny, BP 452, 54001 Nancy cedex, France Search for other works by this author on: GSW Google Scholar GSA Bulletin (1988) 100 (7): 1120–1130. https://doi.org/10.1130/0016-7606(1988)100<1120:GSOAEP>2.3.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation MARC BROUXEL, HENRIETTE LAPIERRE, ANNIE MICHARD, FRANCIS ALBARÉDE; Geochemical study of an early Paleozoic island-arc-back-arc basin system. Part 2: Eastern Klamath, early to middle Paleozoic island-arc volcanic rocks (northern California). GSA Bulletin 1988;; 100 (7): 1120–1130. doi: https://doi.org/10.1130/0016-7606(1988)100<1120:GSOAEP>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 SocietyGSA Bulletin Search Advanced Search Abstract A systematic mineralogical, REE and Sr-Nd isotopic study of the eastern Klamath Mountains pre- to Early Devonian volcanism (Copley tholeiites, Lovers Leap volcanic rocks, Trinity ophiolitic basalts) show that all of the rocks belong to a low-K, island-arc, tholelitic suite, with the exception of the Late Ordovician Lovers Leap Butte calc-alkalic volcanic rocks. All of the latter have low ϵNd values (ϵNd(T)= 3.9), suggesting that they suffered crustal contamination.The Copley and Lovers Leap low-K tholeiites exhibit variable LREE enrichment or depletion and variable ϵNd values (ϵNd(T)range mostly between 5 and 8), suggesting that variable partial melting degree and/or contamination by sediments occur(s). The isotopic features of the Copley high-Mg andesites (boninitic affinities, ϵNd(T) range between 6.2 and 7.9) show that they were derived from the same source as the low-K tholeiites. The Trinity ophiolitic basalts, along with the LREE-depleted Copley and Lovers Leap tholeiites, show similar geochemical and isotopic features (ϵNd(T) = 7.3 and 7.4), suggesting that they belong to the same island-arc-back-arc basin system. 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.
Publication Year: 1988
Publication Date: 1988-07-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 52
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