Mineral precipitation and hydrochemical evolution through evaporitic processes in soda brines (East African Rift Valley)

Getenet, Melese; Otálora, Fermı́n; Emmerling, Franziska; Al-Sabbagh, Dominik; García‐Ruiz, Juan Manuel

doi:10.1016/j.chemgeo.2022.121222

Cited by 7 publications

(3 citation statements)

References 59 publications

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“…Fisheries and Aquatic Sciences main constant during the evaporation process, while K + can be removed by the adsorption process on the active surface of the lake (Lameck et al, 2023). The primary precipitation of calcite and dolomite minerals results for the lower contribution of Ca 2+ and Mg 2+ to the total cations of Lake Chitu, which is true from the review of inland water and soda lake by Getenet et al (2022Getenet et al ( , 2023; Lameck et al (2023).…”

Section: Demtew Etisa and Yiglet Mebratmentioning

confidence: 94%

Recent changes in the phytoplankton community of Soda Lake Chitu, Ethiopia, in response to some environmental factors

Etisa,

Mebrat

2024

Fish Aquat Sci

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While scientific information on the spatial variation of soda lake Microalgae is important to limnological studies, little information was reported from the Ethiopian Rift Valley Lake, Lake Chitu. This study aimed to understand the spatial distribution of the dominant Microalgae taxa in Lake Chitu, Ethiopia. The collection of samples and in situ measurements of some physico-chemical parameters were recorded at three sites for one cycle in November 2021. Fourteen species or genera of Microalgae were identified. Among those, Bacillariophyta were the most important with regard to species abundance and the rarest in species richness. Cyanophyta were the second-most important group in terms of species richness and rarity. Comparatively, all microalgae taxa were rare at both the anthropogenic areas (AA) and the flooding area (FA), which could be mainly due to intensive human and animal intervention and associated with extreme turbidity. Among Cyanophyta, Chroococcus minutus, Microcystis aeruginosa, and Spirulina platensis/fusiformis were predominant at both AA and FA, revealing their adaptation to less clear water and pollution. But S. platensis/fusiformis attained the highest abundance at the FA, indicating their preference for water in a highly nutrient-enriched area. We concluded that the spatial variation of microalgae diversity in relation to water quality parameters has implications for the importance of microalgae as a baseline indicator of water quality assessment tools in lakes.

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Section: Demtew Etisa and Yiglet Mebratmentioning

confidence: 94%

Recent changes in the phytoplankton community of Soda Lake Chitu, Ethiopia, in response to some environmental factors

Etisa,

Mebrat

2024

Fish Aquat Sci

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“…Eventually, the lacustrine water further concentrates into salt pans and naturally occurring alkaline minerals, such as sodium carbonate minerals (Hardie and Eugster, 1970). Therefore, the presence of alkaline minerals in alkaline lacustrine deposits can reflect changes in the sedimentary environment of the waterbody (Gärtner and Witkamp, 2007;Jagniecki et al, 2013;Jia et al, 2015;Yu et al, 2019;Getenet et al, 2023). Accordingly, the types of minerals found in different zones of the Fengcheng Formation can be used to infer changes in paleoenvironmental conditions within each respective zone.…”

Section: Controls On the Distribution Of Organic Mattermentioning

confidence: 99%

Distribution characteristics of organic matter in the Fengcheng Formation in Mahu Sag, Junggar Basin: implications for hydrocarbon generation model in alkaline lacustrine deposition

Ni,

Zhang,

Tang

et al. 2023

Front. Earth Sci.

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Alkaline lacustrine deposits are known for their high primary productivity, unique aquatic environments, and sedimentary patterns, which are conducive to the formation and preservation of organic matter. Consequently, related source rocks have significant hydrocarbon generation potential. The study of hydrocarbon source rocks in the Fengcheng Formation of the Mahu Sag in the Junggar Basin serves as a good example for understanding organic matter enrichment and hydrocarbon generation characteristics of such alkaline lacustrine deposits source rocks. However, the characteristics of organic matter and hydrocarbon generation model in the source rocks of Fengcheng Formation lack systematic research, thus hindering exploration planning and favorable area selection. In this study, analysis of mineral content based on X-ray diffraction and organic geochemical analysis were employed, along with systematic observations of bio-precursor types under fluorescence microscopy. Based on mineral identification and quantitative statistics, the Fengcheng Formation was classified into three zones according to different alkaline mineral assemblages: an inner zone dominated by sodium carbonate minerals, a transitional zone with higher borosilicate mineral content, and a marginal zone characterized by abundant calcite deposition. The inner zone is characterized by the presence of lamalginite and telalginite, which are influenced by high pH values and changes in water depth, and exhibit high maturity characteristics. The transitional zone exhibits high total organic carbon (TOC) values, with predominantly type I and type II1 kerogen. Under fluorescence, the main components were observed to be lamalginite and telalginite, with their distribution being influenced by high salinity and ash supply. The marginal zone has relatively lower TOC than the previous two zones, which is dominated by type II2 kerogens, and contains a certain quantity of terrigenous inertinite supply. The hydrocarbon generation patterns of lamalginite and telalginite are consistent with the bimodal efficient hydrocarbon generation model observed in the source rocks of Fengcheng Formation, revealing the unique hydrocarbon generation model of organic matter in alkaline lacustrine source rocks. This research has significant implications for the exploration strategy of the alkaline lacustrine deposits in the Fengcheng Formation and similar oil- and gas-bearing basins.

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“…Thus, monitoring water quality not only ensures the preservation of biodiversity but also safeguards the livelihoods of people dependent on these ecosystems. Furthermore, studying microbial diversity in these extreme environments contributes to our understanding of life’s adaptability and resilience in extreme conditions, with potential implications for astrobiology (Getenet et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

Chemical, biochemical, and bioactivity studies on some soda lakes, Wadi El-Natrun, Egypt

Mahmoud,

Ali,

Abdelkarim

et al. 2024

Environ Monit Assess

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Wadi El-Natrun is one of the most observable geomorphological features in the North-Western Desert of Egypt; it contains several old saline and saline soda lakes. This study investigates physicochemical and biochemical characteristics and estimates the total phenolic content (TPC), total flavonoid content (TVC), and bioactivities of sediment, cyanobacteria, and brine shrimp (Artemia salina) in soda lakes, i.e., El-Hamra Lake 1 (H1) and El-Hamra Lake 2 (H2). These soda lakes are unique extreme ecosystems characterized by high pH (> 9.3), high alkalinity, and salinity. Some extremophilic microorganisms are hosted in this ecosystem. The results revealed that the chemical water type of studied lakes is soda-saline lakes according to the calculated percentage sequence of major cations and anions. Sodium ranked first among major cations with an abundance ratio of e% 58, while chloride came first among anions with an abundance ratio of e% 71, and bicarbonate and carbonate occupied the last rank with an abundance of 6%. The biochemical investigations showed that TPC and TVC are present in concern contents of sediment, cyanobacteria, and brine shrimp (A. salina) which contribute 89% of antioxidant capacity and antimicrobial activities. Thus, this study helps better understand the chemical and biochemical adaptations in soda lake ecosystems and explores natural sources with potential applications in antioxidant-rich products and environmental conservation efforts.

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Mineral precipitation and hydrochemical evolution through evaporitic processes in soda brines (East African Rift Valley)

Cited by 7 publications

References 59 publications

Recent changes in the phytoplankton community of Soda Lake Chitu, Ethiopia, in response to some environmental factors

Recent changes in the phytoplankton community of Soda Lake Chitu, Ethiopia, in response to some environmental factors

Distribution characteristics of organic matter in the Fengcheng Formation in Mahu Sag, Junggar Basin: implications for hydrocarbon generation model in alkaline lacustrine deposition

Chemical, biochemical, and bioactivity studies on some soda lakes, Wadi El-Natrun, Egypt

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