Crisógono Vásconcelos

Serviço Geológico do Brasil - CPRM

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Judith A. McKenzie

ETH Zurich

R. Warthmann

ZHAW Zurich University of Applied Sciences

Tomaso R. R. Bontognali

University of Basel

Stefano M. Bernasconi

ETH Zurich

Patrick Meister

University of Vienna

Anelize M. Bahniuk

Universidade Federal do Paraná

Mónica Sánchez‐Román

Vrije Universiteit Amsterdam

Daniel Arizteguí

University of Geneva

Timothy I. Eglinton

ETH Zurich

Martin Frank

GEOMAR Helmholtz Centre for Ocean Research Kiel

Cooperative Institutions

ETH Zurich

Centre National de la Recherche Scientifique

Universidade Federal Fluminense

École Polytechnique Fédérale de Lausanne

Universidad de Granada

Institut de physique du globe de Paris

University of Geneva

Geological Institute

Board of the Swiss Federal Institutes of Technology

Université Paris Cité

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Microbial mediation of dolomite precipitation in natural environments, culture experiments and molecular studies

Patrick Meister K. Nealson Judith A. McKenzie R. Warthmann Crisógono Vásconcelos

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Anaerobic sulfur bacteria inducing lithification in modern- and possibly Precambrian stromatolites

Geochimica et Cosmochimica Acta (2006)

R. Warthmann Crisógono Vásconcelos Judith A. McKenzie

Lithification

Stromatolite

10.1016/j.gca.2006.06.1500

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Citations (1)

The importance of microbial mats for dolomite formation in the Dohat Faishakh sabkha, Qatar

Carbonates and Evaporites (2015)

Marisa Brauchli Judith A. McKenzie Christian J. Strohmenger Fadhil Sadooni Crisógono Vásconcelos

Sabkha

Microbial mat

Supralittoral zone

Algal mat

Halite

10.1007/s13146-015-0275-0

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Citations (64)

Geomicrobiology of carbonate microbialites in the Tahiti reef

Geological Society London Special Publications (2015)

R. Warthmann Gilbert Camoin Judith A. McKenzie Crisógono Vásconcelos

Abstract Integrated Ocean Drilling Program (IODP) Expedition 310 (Tahiti Sea Level) offered an opportunity to study the geomicrobiology of a reef framework. Offshore drilling was conducted on the coastal reefs of Tahiti (French Polynesia) at 22 sites in water depths of up to 117 m. Up to 80% of the retrieved core material comprises authigenic grey microbial carbonates with laminated or thrombolitic morphologies, which are associated with corals. Microbialites infilled the cavities during reef development and stabilized the coral reef framework. Rock-surface analyses were performed to track ongoing microbial activity in biofilms that could represent a modern counterpart of the processes at the origin of the formation of fossil microbialites. Significant concentrations of adenosine 5′-triphosphate, indicative of the presence of living microorganisms, were detected at relatively shallow depths, 0–6 m below the seafloor. Exoenzyme activities confirmed the presence of an active metabolizing microbiota forming biofilms in reef cavities. Onshore investigations of the recovered microbes and biofilms completed our picture that the rapid postglacial formation of carbonate microbialites was mediated by the activity of anaerobic microbes, such as sulphate-reducing bacteria and iron-respiring organisms, stimulated by the highly productive reef environment.

Authigenic

Geomicrobiology

Artificial reef

10.1144/sp418.8

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Citations (2)

The Pen Duick Escarpment off Morocco: A promising biogeochemically active carbonate mound laboratory (MiCROSYSTEMS)

Geophysical Research Abstracts (2007)

S.P. Templer Loïs Maignien Judith McKenzie J.‐P. Henriet Crisógono Vásconcelos

Escarpment

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Geomicrobiological Study of Sulfur Nodules Forming in Sediments of Lake Peten Itza, Guatemala

AGU Fall Meeting Abstracts (2006)

Crisógono Vásconcelos Anne Postec R. Warthmann Judith A. McKenzie Flavio S. Anselmetti

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Smectite records across Messinian paleoenvironments in the Mediterranean: Implications for paleoclimate reconstructions and role of microbial processes

Francisca C. Martínez Ruíz M. C. Comas Crisógono Vásconcelos Judith A. McKenzie

RCMNS Interim Colloquium “Marine-continental interactions during the Neogene in the Mediterranean area”, Granada, Spain, 9-12 September 2019

Paleoclimatology

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Lithifying microbial mats in Lagoa Vermelha, Brazil: Modern Precambrian relics?

Sedimentary Geology (2006)

Crisógono Vásconcelos R. Warthmann Judith A. McKenzie Pieter T. Visscher Anne Greet Bittermann

Microbial mat

Carbonate minerals

10.1016/j.sedgeo.2005.12.022

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Citations (201)

Microbially catalyzed dolomite formation: From near-surface to burial

Earth-Science Reviews (2017)

Daniel A. Petrash Or M. Bialik Tomaso R. R. Bontognali Crisógono Vásconcelos Jennifer Roberts

Authigenic

Biogeochemistry

Geologic record

Biogeochemical Cycle

10.1016/j.earscirev.2017.06.015

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Citations (260)

Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system

Geology (2004)

Naila Moreira Lynn M. Walter Crisógono Vásconcelos Judith A. McKenzie Patti J. McCall

Research Article| August 01, 2004 Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system Naila F. Moreira; Naila F. Moreira 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar Lynn M. Walter; Lynn M. Walter 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar Crisogono Vasconcelos; Crisogono Vasconcelos 2Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Judith A. McKenzie; Judith A. McKenzie 2Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland Search for other works by this author on: GSW Google Scholar Patti J. McCall Patti J. McCall 3Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Naila F. Moreira 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Lynn M. Walter 1Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Crisogono Vasconcelos 2Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland Judith A. McKenzie 2Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland Patti J. McCall 3Department of Geological Sciences, University of Michigan, Ann Arbor, Michigan 48109, USA Publisher: Geological Society of America Received: 24 Nov 2003 Revision Received: 02 Apr 2004 Accepted: 05 Apr 2004 First Online: 02 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (8): 701–704. https://doi.org/10.1130/G20353.1 Article history Received: 24 Nov 2003 Revision Received: 02 Apr 2004 Accepted: 05 Apr 2004 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Naila F. Moreira, Lynn M. Walter, Crisogono Vasconcelos, Judith A. McKenzie, Patti J. McCall; Role of sulfide oxidation in dolomitization: Sediment and pore-water geochemistry of a modern hypersaline lagoon system. Geology 2004;; 32 (8): 701–704. doi: https://doi.org/10.1130/G20353.1 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 Dolomite precipitation has been reported in sediments of marginal-marine hypersaline lagoons near Rio de Janeiro, Brazil, and has been related to microbial sulfate reduction. Our field study of pore-water and sediment geochemistry in two lagoons reveals only modest degrees of SO4 reduction and even H2S oxidation. Significant differences in dolomite contents, salinity, and carbon-sulfur cycling occur in the two lagoons; pore waters from the most dolomite-rich sediments exhibit significantly elevated SO4/Cl ratios relative to seawater. Moreover, the O isotope composition of SO4 in all lagoonal waters has evolved significantly from seawater values. This suggests active sulfur recycling via H2S oxidation, which provides acid that decreases pore-water saturation state for high-Mg calcite and aragonite, thermodynamically favoring the precipitation of dolomite. The open hydrogeochemical nature of these lagoons maintains SO4 concentrations below gypsum saturation, allowing dolomite to form from fluids with normal marine Mg/Ca. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Dolomitization

10.1130/g20353.1

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Citations (88)