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Lagoa Vermelha

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Journal Article

Decompositional processes of microbial carbonates in Lagoa Vermelha, Brazil

Fumito Shiraishi, Yusaku Hanzawa, Jiro Asada, Leonardo Fadel Cury, Anelize Manuela Bahniuk
Published: 30 March 2023
Journal of Sedimentary Research (2023) 93 (3): 202–211.
DOI: https://doi.org/10.2110/jsr.2022.053
...Fumito Shiraishi; Yusaku Hanzawa; Jiro Asada; Leonardo Fadel Cury; Anelize Manuela Bahniuk ABSTRACT In Lagoa Vermelha, Brazil, a lagoonal stromatolite and a saltpan microbial mat are investigated to understand the influence of environmental changes on the decomposition of microbial carbonates...
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Journal Article

Sedimentological and geochemical characterization of microbial mats from Lagoa Vermelha (Rio de Janeiro, Brazil)

Caio Bittencourt Guedes, Michele Correia Arena, Hélisson Nascimento dos Santos, Bruno Valle, Jeferson de Andrade Santos, Julia Favoreto, Leonardo Borghi
Published: 30 June 2022
Journal of Sedimentary Research (2022) 92 (6): 591–600.
DOI: https://doi.org/10.2110/jsr.2021.072
..., and geomicrobiology of these microbialites. This paper, however, focuses on the petrography, sedimentology, and geochemistry of recent and superficial microbial mats from Lagoa Vermelha to understand the interaction of carbonate and siliciclastic grains with an organic matrix and discuss their similarities...
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Microstructure and mineral composition of Holocene stromatolites from Lagoa Vermelha, a hypersaline lagoon in Brazil: Insights into laminae genesis

Carolina N. Keim, Hélisson Nascimento dos Santos, Carolina Souza Santiago, Simone Pennafirme, Reiner Neumann, Jürgen Schnellrath, Inayá Lima, Mirian A.C. Crapez, Marcos Farina
Published: 27 August 2020
Journal of Sedimentary Research (2020) 90 (8): 887–905.
DOI: https://doi.org/10.2110/jsr.2020.40
... remains controversial, and a convincing explanation for how stromatolites arise from microbial mats is still lacking. In this work, we analyze in detail a stromatolite from Lagoa Vermelha, a coastal hypersaline lagoon in Rio de Janeiro State, Brazil. The stromatolite presents a laminated core...
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Journal Article

Microbial mediation of modern dolomite precipitation and diagenesis under anoxic conditions (Lagoa Vermelha, Rio de Janeiro, Brazil)

Crisogono Vasconcelos, Judith A. McKenzie
Published: 01 May 1997
Journal of Sedimentary Research (1997) 67 (3): 378–390.
DOI: https://doi.org/10.1306/D4268577-2B26-11D7-8648000102C1865D
... in Lagoa Vermelha, a shallow-water isolated coastal lagoon east of Rio de Janeiro, Brazil, provides a new environment to investigate the factors promoting dolomite precipitation under earth surface conditions. Lagoa Vermelha serves as a natural laboratory in which the dolomite formation process was studied...
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Sampling location at the <span class="search-highlight">Vermelha</span> Lagoon. A) Detail map of <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>...

Sampling location at the Vermelha Lagoon. A) Detail map of Lagoa Vermelha...

Published: 05 April 2021
Fig. 2.— Sampling location at the Vermelha Lagoon. A) Detail map of Lagoa Vermelha showing the E7 sampling site. B) Photo of polygonal mat collected at E7 site. C , D) Transversal cut showing inner laminae and color zonation of the microbial mat collected.
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Location map of <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>, Rio de Janeiro State. A detailed satellite ...

Location map of Lagoa Vermelha, Rio de Janeiro State. A detailed satellite ...

Published: 30 June 2022
Fig. 1.— Location map of Lagoa Vermelha, Rio de Janeiro State. A detailed satellite image shows the geomorphology of Lagoa Vermelha and the sampled location (red circle) (Google Earth 2020).
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An overview of the study sites. A) Location of <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>, Brazil. B...

An overview of the study sites. A) Location of Lagoa Vermelha, Brazil. B...

Published: 30 March 2023
Fig. 1 An overview of the study sites. A) Location of Lagoa Vermelha, Brazil. B) Setting of Lagoa Vermelha, divided into three parts. C) Sampling sites of this study. At the sampled saltpan, evaporitic condensation proceeds from west to east. D) Stromatolites develop in the eastern part
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Maps and photographs of the study area. A–C) Maps showing <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>. ...

Maps and photographs of the study area. A–C) Maps showing Lagoa Vermelha. ...

Published: 27 August 2020
Fig. 1.— Maps and photographs of the study area. A–C) Maps showing Lagoa Vermelha. A) Brazilian coast showing the location of Lagoa Vermelha (arrow), close to Rio de Janeiro city. B) A series of coastal lagoons lies along Rio de Janeiro State coast. The box encloses Lagoa Vermelha. C
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Map showing the location of <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span> on the southeastern coast of the...

Map showing the location of Lagoa Vermelha on the southeastern coast of the...

Published: 05 April 2021
Fig. 1.— Map showing the location of Lagoa Vermelha on the southeastern coast of the state of Rio de Janeiro, Brazil.
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Hypothesis for stromatolite growth in <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span> microbial mats. As pho...

Hypothesis for stromatolite growth in Lagoa Vermelha microbial mats. As pho...

Published: 27 August 2020
Fig. 12.— Hypothesis for stromatolite growth in Lagoa Vermelha microbial mats. As photosynthetic microorganisms migrate upwards towards light, they are followed by microorganisms from underlying layers, as well as by physical and chemical gradients, which results in net growth of the microbial
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Porewater and sediment geochemistry from <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>, Brazil. A: SO 4 2...

Porewater and sediment geochemistry from Lagoa Vermelha, Brazil. A: SO 4 2...

Published: 01 April 2013
Figure 2. Porewater and sediment geochemistry from Lagoa Vermelha, Brazil. A: SO 4 2– , HS – , and dissolved inorganic carbon (DIC). Conc.—concentration. B: Mg 2+ and Ca 2+ . C: pH. D: Calculated saturation indices (SI) for aragonite, calcite, and dolomite. IAP—ion activity product. E: δ 13 C
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Aspects of a recent microbial mat (<span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span>, Brazil) from samples wit...

Aspects of a recent microbial mat (Lagoa Vermelha, Brazil) from samples wit...

Published: 01 October 2010
Figure 4 Aspects of a recent microbial mat (Lagoa Vermelha, Brazil) from samples without acid treatment in natural conditions (Parts A–C) and after an experimental diagenesis, e.g., exposed to anoxia without light for three years (Parts D–F): A) TEM image of algae with a thick cell wall
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TABLE 1. CHEMICAL COMPOSITION OF <span class="search-highlight">LAGOA</span> <span class="search-highlight">VERMELHA</span> (LV) AND DESULFONATRONUM L...

TABLE 1. CHEMICAL COMPOSITION OF LAGOA VERMELHA (LV) AND DESULFONATRONUM L...

Published: 01 December 2006
TABLE 1. CHEMICAL COMPOSITION OF LAGOA VERMELHA (LV) AND DESULFONATRONUM LACUSTRE CULTURE MEDIA
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Figure 4. Dolomite sample from upper few centimeters of <span class="search-highlight">Lagoa</span> <span class="search-highlight">Vermelha</span> sedi...

Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sedi...

Published: 01 December 2000
Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sediment. Scanning electron microscope photomicrograph shows dumbbell and cauliflower shapes similar to those observed in pure cultures of sulfate-reducing bacteria strain LVform6, which was isolated from Lagoa Vermelha sediment.
Journal Article

Bacterially induced dolomite precipitation in anoxic culture experiments

Rolf Warthmann, Yvonne van Lith, Crisógono Vasconcelos, Judith A. McKenzie, Anne Marie Karpoff
Journal: Geology
Published: 01 December 2000
Geology (2000) 28 (12): 1091–1094.
DOI: https://doi.org/10.1130/0091-7613(2000)28<1091:BIDPIA>2.0.CO;2
...Figure 4. Dolomite sample from upper few centimeters of Lagoa Vermelha sediment. Scanning electron microscope photomicrograph shows dumbbell and cauliflower shapes similar to those observed in pure cultures of sulfate-reducing bacteria strain LVform6, which was isolated from Lagoa Vermelha sediment. ...
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Figure 5. Surface- and pore-water \batchmode \documentclass[fleqn,10pt,le...

Figure 5. Surface- and pore-water \batchmode \documentclass[fleqn,10pt,le...

Published: 01 August 2004
— Lagoa Vermelha seaward-side surface brine; triangle—Lagoa Vermelha continental-side surface brine. See text for discussion. SMOW—standard mean ocean water; CDT—Cañon Diablo troilite.
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TABLE 1. COMPOSITION OF LV CULTURE MEDIUM VS. SEASONAL RANGES IS <span class="search-highlight">LAGOA</span> VERM...

TABLE 1. COMPOSITION OF LV CULTURE MEDIUM VS. SEASONAL RANGES IS LAGOA VERM...

Published: 01 December 2000
TABLE 1. COMPOSITION OF LV CULTURE MEDIUM VS. SEASONAL RANGES IS LAGOA VERMELHA
Journal Article

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

Naila F. Moreira, Lynn M. Walter, Crisogono Vasconcelos, Judith A. McKenzie, Patti J. McCall
Journal: Geology
Published: 01 August 2004
Geology (2004) 32 (8): 701–704.
DOI: https://doi.org/10.1130/G20353.1
...— Lagoa Vermelha seaward-side surface brine; triangle—Lagoa Vermelha continental-side surface brine. See text for discussion. SMOW—standard mean ocean water; CDT—Cañon Diablo troilite. ...
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Figure 3. Chloride concentrations of surface brines and pore waters in stud...

Figure 3. Chloride concentrations of surface brines and pore waters in stud...

Published: 01 August 2004
Figure 3. Chloride concentrations of surface brines and pore waters in study lagoons. Surface brines are indicated by square symbols. Lagoa Vermelha brines are likely sourced from seawater and meteoric water, while Brejo do Espinho brines are sourced from seawater and Lagoa Araruama brine. SW
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Schematic sketch representing the lagoons and sandy barriers of Região dos ...

Schematic sketch representing the lagoons and sandy barriers of Região dos ...

Published: 30 June 2022
Fig. 2.— Schematic sketch representing the lagoons and sandy barriers of Região dos Lagos region. 1) Precambrian basement, 2) Pre-Flandrian sandy deposits, 3) lagoon deposits and inner lagoon, 4) external sandy barrier, 5) external lagoons (Lagoa Vermelha), 6) Post-Flandrian barriers (modified