Geochemical barriers as forms of geosystems’ self-organization

Khaustov, Aleksandr; Петрович, Хаустов Александр

doi:10.22363/2313-2310-2017-25-3-396-413

Cited by 4 publications

(4 citation statements)

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“…The data used present the PAH flows on 3 sampling stations: in the river zone, in the gravitational and physico-chemical zones of the marginal filter and in the sea zone [2]. The PAHs concentration coefficients CC were analyzed for the set of GCB in the studied aquatic system as the ratio of PAH in the "receiving" medium to the PAH in the releasing one [3]. We emphasize the role of dissolved organic matter in the formation of specific associations of PAHs.…”

Section: Research Methods and Objectsmentioning

confidence: 99%

“…When working with empirical material, for natural environments the transitions of associations of chemical elements and compounds are revealed, which are very far from the theoretical concepts of classical thermodynamics about minimizing energy [3,5]. Obviously, fractionation of PAHs will most contrastly occur during transitions between interconnected system components.…”

Section: Fig 2 Pah Flows In the Aquatic System Of The Northern Dvinmentioning

confidence: 99%

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Identification of matter flows in marginal filters of rivers (based on the principles of thermodynamics)

2020

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Material and energy flows in the marginal filters of rivers identified based on the analyses of the environmental fate of polycyclic aromatic hydrocarbons (PAH): Anthracene (An), Phenanthrene (Phen), Naphthalene (Naph), Pyrene (Py), Fluoranthene (Flu), Chrysene (Chr), Benzo[a]pyrene (BaP), Perylene (Pl). Experimental data on the components of the aquatic system of the marginal filter of the Northern Dvina River allow us to consider the processes of phase transitions of PAHs at geochemical barriers (GCB). Based on the principles of thermodynamics, a phenomenological model of migration and the formation of the most persistent PAH associations on the barriers is formed. The predominant possibility of PAH migration on suspended material, including biota, is shown. The probability of PAH accumulation between the most important components of aquatic systems was assessed according to the conditions of their migration activity in various zones of the marginal filter. Active and passive PAHs were determined in terms of their migration and accumulation in the components of aquatic systems. The role of PAHs as a reliable indicator of thermodynamic processes, including the development of technogenesis, is estimated.

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Section: Research Methods and Objectsmentioning

confidence: 99%

Section: Fig 2 Pah Flows In the Aquatic System Of The Northern Dvinmentioning

confidence: 99%

Identification of matter flows in marginal filters of rivers (based on the principles of thermodynamics)

2020

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“…Their concentration coefficients CC were analyzed for cases of the transition through GCB (ratio of PAH in the "receiving" medium to the PAH in the releasing one). For all studied media, the most probable sources (pyrogenic, petrogenic) of the pollution were identified using traditional indicator ratios [1,4,5].…”

Section: Research Methods and Objectsmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons as markers of environmental and hydrological processes (identification problems and research experience)

2020

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The efficiency of the study of polycyclic aromatic hydrocarbons (PAHs) as markers of many environmental and hydrological processes is disclosed. On the example of the interaction between sea and river water the flows of substances and problems of their detection in media, as well as the laws of fractionation during phase transitions at geochemical barriers (GCB) are presented. The authors have collected an extensive database for almost all types of natural environments. Own research was conducted at specialized water testing sites (springs, a mud volcano, brine of a lake, the Northern Dvina River, water of Black and White Seas, water bodies of the Moscow Region and Albena region (Bulgaria), etc. This allowed substantiating the optimal markers and creating effective methods for identifying a complex of hydrological processes.

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“…However, many previous studies have potentially assumed that the geochemical background varies continuously across space. This assumption may be inappropriate in scenarios where singularity can occur, for example, due to the presence of geochemical barriers (e.g., Perel'man, 1986; Khaustov, 2017), thereby introducing additional uncertainty.…”

Section: Uncertainty Sources In Geochemical Mappingmentioning

confidence: 99%

Uncertainty Quantification in Geochemical Mapping: A Review and Recommendations

Wang,

Zuo

2024

Geochem Geophys Geosyst

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Geochemical mapping is a crucial tool that can provide valuable insights for a wide range of applications, including mineral resources prospecting, environmental impact assessment, geological process understanding, and climate change research. Despite its significance, geochemical mapping requires spatial modeling based on sparse, heterogeneous, and potentially inaccurate data sets. Moreover, the underlying geological processes are often imperfectly understood. Therefore, uncertainty quantification (UQ) is vital in geochemical mapping to ensure accurate and reliable results, ultimately facilitating well‐informed decision‐making. In this contribution, we distinguish two primary types of uncertainties: systemic and stochastic. We identify the key sources of uncertainties in geochemical mapping and review the techniques that have been employed or hold potential for uncertainty quantification, communication, visualization, and sensitivity analysis. This contribution also illustrates the general procedure of UQ in geochemical mapping by a case study of mapping geochemical anomalies associated with gold mineralization in northwestern Sichuan Province, China. We also explore potential strategies for mitigating the critical uncertainties, such as gathering more geochemical data, developing more effective models, enhancing our understanding of the geochemical dispersion process, or leveraging other thematic information or knowledge. Future research should prioritize addressing underexplored uncertainties and implementing more practical applications to validate the UQ procedure in geochemical mapping.

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Geochemical barriers as forms of geosystems’ self-organization

Cited by 4 publications

References 0 publications

Identification of matter flows in marginal filters of rivers (based on the principles of thermodynamics)

Identification of matter flows in marginal filters of rivers (based on the principles of thermodynamics)

Polycyclic aromatic hydrocarbons as markers of environmental and hydrological processes (identification problems and research experience)

Uncertainty Quantification in Geochemical Mapping: A Review and Recommendations

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