Organic matter diagenesis and precipitation of Mg-rich carbonate and dolomite in modern hypersaline lagoons linked to climate changes

Areias, Camila; Barbosa, Cátia F; Cruz, Anna Paula Soares; McKenzie, Judith A.; Ariztegui, Daniel; Eglinton, T. I.; Haghipour, Negar; Vásconcelos, Crisógono; Sánchez‐Román, Mónica

doi:10.1016/j.gca.2022.09.030

Cited by 15 publications

(12 citation statements)

References 104 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Described as engines of a massive biological pump responsible for atmospheric oxygenation and carbon fixation, green algae and cyanobacteria are central elements of sediment early diagenesis (Areias et al, 2022; Popall et al, 2020; Sánchez‐Baracaldo et al, 2022; Zhao et al, 2023). In micritization, they have been described as the key players in grain microboring (Alexandersson, 1972; Bathurst, 1966; Dupraz et al, 2009; Kobluk & Risk, 1977b), and in modern shallow marine settings, they are the main endoliths infesting and actively affecting carbonate precursors (Garcia‐Pichel, 2006; Garcia‐Pichel et al, 2010; Reid et al, 2000).…”

Section: Roles Of Microorganisms In the Micritization Processmentioning

confidence: 99%

Searching for microbial contribution to micritization of shallow marine sediments

Garuglieri,

Marasco,

Odobel

et al. 2024

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

Micritization is an early diagenetic process that gradually alters primary carbonate sediment grains through cycles of dissolution and reprecipitation of microcrystalline calcite (micrite). Typically observed in modern shallow marine environments, micritic textures have been recognized as a vital component of storage and flow in hydrocarbon reservoirs, attracting scientific and economic interests. Due to their endolithic activity and the ability to promote nucleation and reprecipitation of carbonate crystals, microorganisms have progressively been shown to be key players in micritization, placing this process at the boundary between the geological and biological realms. However, published research is mainly based on geological and geochemical perspectives, overlooking the biological and ecological complexity of microbial communities of micritized sediments. In this paper, we summarize the state‐of‐the‐art and research gaps in micritization from a microbial ecology perspective. Since a growing body of literature successfully applies in vitro and in situ ‘fishing’ strategies to unveil elusive microorganisms and expand our knowledge of microbial diversity, we encourage their application to the study of micritization. By employing these strategies in micritization research, we advocate promoting an interdisciplinary approach/perspective to identify and understand the overlooked/neglected microbial players and key pathways governing this phenomenon and their ecology/dynamics, reshaping our comprehension of this process.

show abstract

Section: Roles Of Microorganisms In the Micritization Processmentioning

confidence: 99%

Searching for microbial contribution to micritization of shallow marine sediments

Garuglieri,

Marasco,

Odobel

et al. 2024

Environmental Microbiology

Self Cite

View full text Add to dashboard Cite

show abstract

“…9). These examples include Lagoa Vermelha (van Lith et al, 2002;Areias et al, 2022) and Brejo do Espinho (Sánchez-Román et al, 2009a) in Brazil; Deep Springs Lake (Meister et al, 2011), Great Salt Lake (Dunham et al, 2020), and Searles Lake in U.S.A. (Smith and Stuiver, 1979), Manito Lake in Canada (Last et al, 2012), East Basin Lake in Australia (Last, 1992), Salada Mediana playa-lake (Valero-Garcés et al, 2000) and Gallocanta Lake in Spain (Luzón et al, 2009), Qinghai Lake (Deng et al, 2010) and Siling Lake (Goto et al, 2003) in China, Lake Van in Turkey (McCormack et al, 2018, Lake Bosumtwi in Ghana (Talbot and Kelts, 1986), Sambhar Lake playa lake in India (Sinha and Smykatz-Kloss, 2003). The majority of these lakes are alkaline brackish lakes (e.g., Manito Lake, Qinghai Lake, Siling Lake, and Lake Van) and non-alkaline saline lakes (e.g., Great Salt Lake, Salada Mediana playa-lake, Gallocanta Lake) (Fig.…”

Section: Application To Other Lakes Bearing Dolomite Depositsmentioning

confidence: 99%

Lacustrine dolomite in deep time: What really matters in early dolomite formation and accumulation?

Guo,

Wen,

et al. 2023

Earth-Science Reviews

Self Cite

View full text Add to dashboard Cite

“…Evaporative lagoon facies are rarely considered as exploration targets and are regarded as cap beds because of the development of gypsum. However, periodic climatic and biological variations result in changes of the lithofacies in lagoon facies [21,69,70]. In dry conditions, evaporitic minerals deposit and form gypsum beds, while wet conditions result in microbial mats that contribute to organic matter enrichment, and the salinity is relatively low (Figure 8).…”

Section: Self-sourced Unconventional Tight Marlstone Reservoir Potent...mentioning

confidence: 99%

Self-Sourced Unconventional Tight Marlstone Reservoir Potential from Evaporative Lagoon of Triassic Leikoupo Formation in the Central Sichuan Basin

Zhang,

Xin,

Zhang

et al. 2023

Energies

View full text Add to dashboard Cite

A breakthrough was made in tight marlstone reservoirs from an evaporative lagoon in the second sub-member of the third member of the Leikoupo Formation (Lei3-2) in the Central Sichuan Basin. The source rock characteristics, reservoir characteristics of the marlstone and geochemical parameters of the oil and natural gas were investigated to evaluate the unconventional hydrocarbon exploration potential of the tight marlstone from the evaporative lagoon. The results revealed that the source rocks were deposited in evaporative lagoon environments, and the average total organic carbon (TOC) content value for the samples was 0.75 wt%. The thermal maturity of the organic matter was relatively high, with a calculated vitrinite reflectance (Rc) of 1.7%. The characteristics of marlstones suggest that the potential source rocks had fair to good hydrocarbon generative potential. The condensate samples had low densities, low viscosities and high thermal maturity, with a Rc value of 1.7%. For the natural gas, the dry coefficient was around 0.90, and the carbon isotopic compositions of methane and ethane was −41.3‰ and −28.4‰, respectively. According to the carbon isotopic compositions, thermal maturity and geological background, the oil and natural gas from Lei3-2 are comparable with the marlstone of Lei3-2. Thus, the oil and natural gas is self-sourced and originates from the marlstone in the Lei3-2. Micropores and microfractures are often detected in the marlstone from Lei3-2, and a gypsum layer is conducive to the hydrocarbon preservation. These results suggest that the evaporative lagoon facies in Lei3-2 have large, self-sourced, unconventional, tight marlstone reservoir potential. This study also enhances the prospects for further oil and gas exploration of evaporative lagoon facies in other basins.

show abstract

Organic matter diagenesis and precipitation of Mg-rich carbonate and dolomite in modern hypersaline lagoons linked to climate changes

Cited by 15 publications

References 104 publications

Searching for microbial contribution to micritization of shallow marine sediments

Searching for microbial contribution to micritization of shallow marine sediments

Lacustrine dolomite in deep time: What really matters in early dolomite formation and accumulation?

Self-Sourced Unconventional Tight Marlstone Reservoir Potential from Evaporative Lagoon of Triassic Leikoupo Formation in the Central Sichuan Basin

Contact Info

Product

Resources

About