Research Article| September 01, 2009 Is mid-late Paleozoic ocean-water chemistry coupled with epeiric seawater isotope records? Uwe Brand; Uwe Brand 1Department of Earth Sciences, Brock University, St. Catharines, Ontario L2S 3A1, Canada Search for other works by this author on: GSW Google Scholar Jun-ichi Tazawa; Jun-ichi Tazawa 2Department of Geology, Niigata University, Niigata 950-2181, Japan Search for other works by this author on: GSW Google Scholar Hiroyoshi Sano; Hiroyoshi Sano 3Department of Earth & Planetary Sciences, Kyushu University, Fukuoka 812-8581, Japan Search for other works by this author on: GSW Google Scholar Karem Azmy; Karem Azmy 4Department of Earth Sciences, Memorial University, St. John's Newfoundland L A1B 3X5, Canada Search for other works by this author on: GSW Google Scholar Xinqing Lee Xinqing Lee 5Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou 550002, China Search for other works by this author on: GSW Google Scholar Geology (2009) 37 (9): 823–826. https://doi.org/10.1130/G30038A.1 Article history received: 14 Jan 2009 rev-recd: 07 Apr 2009 accepted: 28 Apr 2009 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Uwe Brand, Jun-ichi Tazawa, Hiroyoshi Sano, Karem Azmy, Xinqing Lee; Is mid-late Paleozoic ocean-water chemistry coupled with epeiric seawater isotope records?. Geology 2009;; 37 (9): 823–826. doi: https://doi.org/10.1130/G30038A.1 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 Isotopes of epeiric sea carbonates are used to construct seawater records for modeling global changes in Paleozoic ocean chemistry, climate, and for intercontinental correlation. We present for the first time geochemical results of Paleozoic brachiopods (biogenic low-Mg calcite, bLMC) from open-ocean Permian–Carboniferous seamounts of Japan situated in the tropical mid-Panthalassic Ocean. Strontium isotope values of bLMC from the Panthalassic and Paleotethys Oceans are coupled with those of coeval specimens from epeiric seas of North America, Europe, and Russia (p = 0.393), but not with those of epeiric sea whole rocks (matrix aragonite/calcite, mAC; p = 0.029) and conodonts (biogenic apatite, bA; p = 0.031). Oxygen isotope values of bLMC from the Panthalassic and Paleotethys exhibit mixed results with studies of counterparts from epeiric seas (p = 0.596) reflecting overprinting of local environmental conditions on global trends. Carbon isotope values of bLMC and mAC from the Panthalassic and Paleotethys Oceans are generally dissimilar to those of coeval material from epeiric seas of North America, Europe, and Russia (p = 0.001 and 0.002, respectively). Factors such as water mass stratification, evaporation, dilution, depth, temperature, carbon burial and/or oxidation variations, and syndepositional diagenesis within the local environment probably influenced the chemistry of the fauna and accumulating sediments. This decoupling of carbon and oxygen isotope values from the open ocean with those from epeiric seas makes questionable the use of isotope results from epeiric seas for international correlation, constructing global seawater records, determining fluxes in the global carbon cycle, and for modeling climate changes and subsequently atmospheric carbon dioxide levels. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.