Coral reef diagenesis records pore-fluid evolution and paleohydrology of a siliciclastic basin margin succession (Eocene South Pyrenean foreland basin, northeastern Spain)

Abstract

Research Article| March 01, 1999 Coral reef diagenesis records pore-fluid evolution and paleohydrology of a siliciclastic basin margin succession (Eocene South Pyrenean foreland basin, northeastern Spain) James P. Hendry; James P. Hendry 1School of Geosciences, Queen's University of Belfast, Belfast BT7 1NN, United Kingdom Search for other works by this author on: GSW Google Scholar Conxita Taberner; Conxita Taberner 2Institut de Ciéncias de la Terra, C.S.I.C., c/Lluís Solé i Sabaris s/n, 08028 Barcelona, Spain Search for other works by this author on: GSW Google Scholar James D. Marshall; James D. Marshall 3Department of Earth Sciences, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United Kingdom Search for other works by this author on: GSW Google Scholar Catherine Pierre; Catherine Pierre 4Laboratoire d'Océanographie Dynamique, Université Pierre et Marie Curie, Paris, France Search for other works by this author on: GSW Google Scholar Paul F. Carey Paul F. Carey 1School of Geosciences, Queen's University of Belfast, Belfast BT7 1NN, United Kingdom Search for other works by this author on: GSW Google Scholar Author and Article Information James P. Hendry 1School of Geosciences, Queen's University of Belfast, Belfast BT7 1NN, United Kingdom Conxita Taberner 2Institut de Ciéncias de la Terra, C.S.I.C., c/Lluís Solé i Sabaris s/n, 08028 Barcelona, Spain James D. Marshall 3Department of Earth Sciences, University of Liverpool, P.O. Box 147, Liverpool L69 3BX, United Kingdom Catherine Pierre 4Laboratoire d'Océanographie Dynamique, Université Pierre et Marie Curie, Paris, France Paul F. Carey 1School of Geosciences, Queen's University of Belfast, Belfast BT7 1NN, United Kingdom Publisher: Geological Society of America First Online: 01 Jun 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 Geological Society of America GSA Bulletin (1999) 111 (3): 395–411. https://doi.org/10.1130/0016-7606(1999)111<0395:CRDRPF>2.3.CO;2 Article history First Online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation James P. Hendry, Conxita Taberner, James D. Marshall, Catherine Pierre, Paul F. Carey; Coral reef diagenesis records pore-fluid evolution and paleohydrology of a siliciclastic basin margin succession (Eocene South Pyrenean foreland basin, northeastern Spain). GSA Bulletin 1999;; 111 (3): 395–411. doi: https://doi.org/10.1130/0016-7606(1999)111<0395:CRDRPF>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 An integrated field, petrographic, and geochemical study has determined the fluid-rock interaction history in part of an Eocene reef complex on the margins of the siliciclastic-dominated Catalan sector of the South Pyrenean foreland basin. Results show that at least four distinct fluid systems influenced the basin margin, and demonstrate the sensitivity of reef rocks as paleohydrological archives in siliciclastic environments.The earliest calcite cements precipitated from meteoric waters at shallow burial depths, and mineralogical stabilization of reef carbonate was mostly completed during this episode. Textural and isotope trends typical of paleo-exposure surfaces are lacking, and trace element results suggest that meteoric waters were transmitted laterally and/or upward into the reef via delta-lobe sandstone paleoaquifers.The distribution of late cements is highly variable and fracture-fed, demonstrating the importance of deformation in controlling fluid flow subsequent to reef lithification. Isotopic and elemental compositions of burial calcites, plus their paragenetic association with barite and dolomite, show that fluids of marine parentage were expelled from compacting basinal marls into the basin margin paleoaquifers. The Calders reef also records an episode of extrabasinal fluid circulation, probably associated with faulting of the basin margin. Ferroan saddle dolomite contains fluid inclusions with elevated homogenization temperatures, indicating thermal disequilibrium with the surrounding strata. Hydrothermal activity was possibly related to Neogene extensional tectonics. The final cement stage in the reef records the influence of telogenetic meteoric water, possibly reflecting the present-day basin margin hydrology. 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.