VPS26 | SSP/GM virtual posters II
Wed, 14:00
Poster session
SSP/GM virtual posters II
Co-organized by GM/SSP
Posters virtual
| Attendance Wed, 30 Apr, 14:00–15:45 (CEST) | Display Wed, 30 Apr, 14:00–18:00
 
vPoster spot 2
Wed, 14:00

Posters virtual: Wed, 30 Apr, 14:00–15:45 | vPoster spot 2

The posters scheduled for virtual presentation are visible in Gather.Town. Attendees are asked to meet the authors during the scheduled attendance time for live video chats. If authors uploaded their presentation files, these files are also linked from the abstracts below. The button to access Gather.Town appears just before the time block starts. Onsite attendees can also visit the virtual poster sessions at the vPoster spots (equal to PICO spots).
Display time: Wed, 30 Apr, 08:30–18:00
Chairpersons: Arianna Valentina Del Gaudio, Sebastian Mulder, Kristen Cook
vP2.1
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EGU25-4626
Yijun zhuang

Shale oil, as one of the most important unconventional oil and gas resources, has become the key target of oil and gas exploration in recent years. The Fengcheng formation in Mahu Sag is the best source rock in the sag, which has great potential for shale oil resources and is the key area for shale oil exploration in Junggar Basin.

Volcanic activity was frequent during the sedimentary period of Fengcheng Formation in the northern part of Mahu Sag. The sediments are mainly composed of tuff material of volcanic activity, evaporation material of caustic lake and a small amount of detrital material. The terrigenous detrital material mainly comes from long-distance transport, while the pyroclastic material is closely related to the proximal volcanic activity. The lithofacies development of shale is characterized by frequent overlapping of various lithologies, diverse combination types and rapid changes. The microfabric of fine-grained sedimentary rocks is characterized, the lithofacies types of fine-grained sedimentary rocks are summarized, and the assemblage relationship and development law of lithofacies in different environments are analyzed. The formation process of lacustrine fine-grained sedimentary rocks is discussed from the perspective of provenance supply and sedimentary dynamics, and the lithofacies development model of fine-grained sedimentary rocks is established. To a certain extent, the theory of lacustrine sedimentology is enriched and perfected, and it can also provide basic geological basis for tight oil exploration in this area.

How to cite: zhuang, Y.: The origin and lithofacies development characteristics of fine particle composition in the shale of the second member of Fengcheng Formation in Mahu Sag, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-4626, https://doi.org/10.5194/egusphere-egu25-4626, 2025.

vP2.2
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EGU25-4736
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ECS
Yuanchen Jiang

Abstract:Lake deltas are located in the complex zone of lake and river interaction, influenced by the dual effects of material exchange between the two. There are not only climate and water level influences, but also topography and geomorphology and waves and other lake hydrodynamic influences, resulting in a more complex lake delta evolution process. To explore the sedimentary characteristics and the impact of lake dynamics during different stages of delta development under the influence of coast current, the Muhuahe Delta in Daihai Lake is taken as the study object for modern sedimentary investigations. Through the analysis of high-precision satellite photos and the interpretation of profile information collected by UAV oblique photography, the sedimentary evolution of the delta in the study area was analyzed in detail. The results show that delta deposits are developed in the eastern gentle slope zone of Daihai, and the delta front subfacies are widely distributed. The profile shows that the sand bodies are affected by strong hydrodynamics, and a large number of wave-formed structures are developed and lateral migration is obvious on the plane. Satellite remote sensing data suggest the sedimentary sand bodies' development and distribution characteristics, indicating the control of coast current in the development and evolution of the delta. The delta is asymmetric, with well-developed sand dams at the delta front, growing parallel to the shoreline. Although influenced by provenance supply, during this period, the delta is controlled by littoral currents, and its expansion toward the lake basin is suppressed. Generally, coast current plays a significant role in modifying the plane distribution and scale of the delta front sand bodies. Reservoir heterogeneity is often generated due to different dominant hydrodynamic conditions, providing a reference for further exploration into the influence of coast current on reservoir development and distribution.

Keywords: coast current; gentle slope delta; sedimentary evolution

How to cite: Jiang, Y.: Sedimentary Evolution and Morphological Characteristics of Modern Lake Shoreline Delta under the Influence of Coast Current, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-4736, https://doi.org/10.5194/egusphere-egu25-4736, 2025.

vP2.3
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EGU25-4788
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ECS
Cerennaz Yakupoglu, Kürşad Kadir Eriş, Nurgül Karlıoğlu Kılıç, Rüya Yılmaz Dağdeviren, Atike Nazik, Dursun Acar, Nurettin Yakupoğlu, Asen Sabuncu, and Erdem Kırkan

Coastal areas and related sedimentary environments are remarkable providers of valuable information about climatic changes and sea level oscillations. Lake Mert was formed as a shallow Black Sea coastal lagoon that contains various mixtures of marine and freshwater sources. This study presents sedimentological, geochemical and paleontological analyses of five sediment cores recovered from the lake which has been severely influenced by sea level change and local climate over the last 6.5 cal. ka BP. The environmental and climatic records obtained by multi-proxy analyses of the cores (µ-XRF, total organic carbon, stable isotope, pollen analysis and foram content) that are confidently correlated with other regional and global climate signals. In addition, Lake Mert also remains a challenge to identify and quantify dynamic changes in time on the coastal plain, thus, it possibly reflects hydrologic changes in the Black Sea since the middle Holocene. Analysis of lithology together with paleontological content of the studied cores reveal three main depositional units, each of them indicates varying areal facies distribution due to highly dynamic depositional settings in lake. Accordingly, the main lithofacies in the cores from bottom to top are defined as a relict lacustrine sediment older than 6.5 cal. ka BP (Unit 3), coastal and deltaic facies deposited between 6.5 to 4.5 cal. ka BP (Unit 2) and the younger lagoon-marine sediment (Unit 1).

Moreover, the correlation of well-dated sedimentological and geochemical proxies with the sea level and sea surface salinity records from the Black Sea allows us differentiate various phases of hydrologic changes due to connections with the Lake Mert during the middle-to-late Holocene. Our preliminary results suggest that the relict Mert Lake was first invaded by the Black Sea waters prior to 6.5 cal. ka BP, and then remained its fully connection until ~5.3 cal. ka BP due to subsequent inflow of the Mediterranean Sea via Bosporus. Furthermore, the decelerated sea level rise between 5.3 and 4.5 cal. ka BP gave rise to return semi-closed lagoon phase, restricting mixture with the Black Sea waters as inferred from stable oxygen isotope record. The later period, particularly after 3.5 cal. ka BP, was associated with more Euryhaline condition in the lake based on the paleontological content of the core sediment. The local climate changes are recorded in Lake Mert as a wet period between 6.5 and 4.5 cal. ka BP, a dry period between 4.5 and 2.9 cal. ka BP and wetter period after 2.9 cal. ka BP, respectively.

How to cite: Yakupoglu, C., Eriş, K. K., Karlıoğlu Kılıç, N., Yılmaz Dağdeviren, R., Nazik, A., Acar, D., Yakupoğlu, N., Sabuncu, A., and Kırkan, E.: Middle-to-Late Holocene Climate Change in Lagoon Lake Mert (NW Black Sea) and Its Hydrological Connection with the Black Sea: evidences from multi-proxy records , EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-4788, https://doi.org/10.5194/egusphere-egu25-4788, 2025.

vP2.4
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EGU25-2377
Peng Huang, Longwei Qiu, Can Ling, and Yongqiang Yang

The evolution of pore and throat structures in tight sandstone reservoirs plays a critical role in determining reservoir quality and hydrocarbon accumulation efficiency. Despite growing attention to the impact of diagenesis on reservoir heterogeneity, the synergistic effects of multiple authigenic minerals and their dynamic control on hydrocarbon accumulation windows remain poorly understood. This study investigates typical tight sandstone reservoirs, including the Yanchang Formation in the Ordos Basin, the Wutonggou Formation in the Junggar Basin, and the Messinian salt crisis deposits in the Nile Delta Basin. Using advanced techniques such as scanning electron microscopy (SEM), cathodoluminescence (CL), synchrotron radiation analysis, thermodynamic modeling, and 3D pore-throat network reconstruction, we systematically analyze the interplay between zeolite and clay minerals during diagenetic evolution and their implications for reservoir quality.

The results demonstrate that early-stage zeolite dissolution significantly enhances pore structures, with an increase in porosity of 10%-18%, forming secondary pore-dominated "pore reconstruction zones." Subsequently, the progressive precipitation and cementation of clay minerals, such as smectite-illite mixed layers, lead to substantial pore-throat blockage, reducing permeability by 30%-45%. Chlorite coatings initially protect grain surfaces by delaying compaction, but excessive chlorite precipitation in later stages exacerbates pore-throat clogging and permeability degradation. Based on time-sequential analysis and thermodynamic modeling, we introduce the innovative concept of the "dissolution-accumulation window" and quantitatively define the critical reservoir properties for efficient hydrocarbon charging (porosity >8% and permeability >0.01 mD).

Regional comparative analysis highlights distinct diagenetic pathways under varying depositional and diagenetic environments. In the Ordos Basin, feldspar dissolution and kaolinite precipitation significantly improve reservoir quality, while intense zeolite cementation in volcanic lithic sandstones of the Junggar Basin accelerates reservoir densification. In the Messinian deposits of the Nile Delta, deep burial clay mineral transformations dominate reservoir heterogeneity and permeability reduction. This study develops a "dissolution-fill-reconstruction" multi-stage diagenetic evolution model, providing novel insights into the dynamic control of multimineral diagenesis on pore-throat structures and hydrocarbon accumulation. The findings offer a theoretical framework for predicting high-quality reservoirs across basins and guiding effective hydrocarbon exploration and development.

Keywords
Tight sandstone, Diagenesis, Pore-throat structure, Zeolite minerals, Clay minerals, Hydrocarbon accumulation window

How to cite: Huang, P., Qiu, L., Ling, C., and Yang, Y.: Dynamic Control of Multimineral Diagenetic Processes on the Evolution of Pore-Throat Structures and Hydrocarbon Accumulation Windows in Tight Sandstone Reservoirs, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2377, https://doi.org/10.5194/egusphere-egu25-2377, 2025.

vP2.5
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EGU25-2655
Jiyang Wang, Jianhua Zhao, Zuhui You, Xiugang Pu, Keyu Liu, Wei Zhang, Zhannan Shi, Wenzhong Han, and Zhihao Wang

Lacustrine organic-rich Eocene mudstones are well developed and demonstrates significant exploration potential for shale oil in the Qibei Sub-sag, Bohai Bay Basin, China. However, their oil content displays strong heterogeneity, which poses challenges for effective exploration and development. Diagenesis implicates compaction, cementation, dissolution/re-precipitation processes that raises critical questions regarding reservoir quality and oil-bearing heterogeneity.

Integrated high‐resolution petrologic analysis, organic geochemistry, and pore throat structure characterization provide a powerful approach to investigate the diagenesis, reservoir and oil-bearing characteristics. The 50 samples were collected from the 111.39-m-thick Eocene the first Sub-member of the third Member of the Shahejie Formation lacustrine oil-prone source rock succession penetrated by the two wells in the Qibei Sub-sag. Six typical lithofacies were identified: laminated medium-grained calcareous shale, laminated fine-grained mixed shale, thin-bedded fine-grained mixed mudstone, thin-bedded medium-grained mixed mudstone, massive medium-grained mixed mudstone, and thin-bedded coarse-grained felsic mudstone.

The micritic calcite laminae formed during the sedimentary stage underwent recrystallization during the early to middle diagenetic stages, transforming into granular sparry calcite. Potassium feldspar dissolution and clay mineral transformation resulted in the formation of authigenic albite and quartz. These diagenetic processes promoted the development and preservation of intercrystalline/interparticle pores. As a result, the laminated medium-grained calcareous and laminated fine-grained mixed shale reservoirs exhibit superior reservoir properties, primarily characterized by interparticle pores, intercrystalline pores, clay mineral-associated pores, and bedding fractures. With a median pore throat diameter of 11.6 nm and an average porosity of 6.53%, these reservoirs are classified as Type I. The thin-bedded fine-grained mixed shale primarily develops clay mineral-associated pores and interparticle pores, with some bedding fractures. Its median pore throat diameter is 9.2 nm, and the average porosity is 5.56%, classifying it as a Type II reservoir. The thin-bedded medium-grained mixed and massive medium-grained mixed mudstones mainly develop interparticle pores and clay mineral-associated pores. These have a median pore throat diameter of 12.6 nm and an average porosity of 4.3%, classifying them as Type III reservoirs. In felsic mudstone, calcite cementation significantly reduced porosity during the early diagenetic stage. This results in the poorest porosity development in the thin-beded coarse-grained felsic mudstone, which has a median pore throat diameter of 15.9 nm and an average porosity of 3.26%, classifying it as Type IV reservoir.

The laminated medium-grained calcareous shale, laminated fine-grained mixed shale, and thin-bedded fine-grained mixed mudstone exhibit relatively high oil content and OSI values. The average oil content values are 2.48 mg/g, 2.64 mg/g, and 2.30 mg/g, respectively, and the average OSI values are 144 mg HC/g TOC, 163 mg HC/g TOC, and 168 mg HC/g TOC. These lithofacies are favorable for shale oil exploration and development. We suggest that addressing the challenges of mudstone diagenesis will significantly improve understanding and prediction of reservoir quality and oil-bearing heterogeneity in unconventional shale oil plays.

How to cite: Wang, J., Zhao, J., You, Z., Pu, X., Liu, K., Zhang, W., Shi, Z., Han, W., and Wang, Z.: Diagenesis, reservoir-quality, and oil-bearing heterogeneity of the Eocene deep-lacustrine mudstone in the Qibei Sub-sag, Bohai Bay Basin, China, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2655, https://doi.org/10.5194/egusphere-egu25-2655, 2025.

vP2.6
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EGU25-2783
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ECS
yichun yao and yongqiang yang

        

        Glutenite Fans is one of the most favorable reservoirs for exploration and development in recent years and is widely distributed in the world. In recent years, major breakthroughs have been made in oil and gas exploration of glutenite fans in Luojia area in Luoxie 180 and Luo25 Wells. The Jiyang exploration area is a high mature exploration area in the east, which has entered the exploration stage mainly to search for subtle oil and gas reservoirs, and Glutenite Fans, as an important part of subtle oil and gas reservoirs, has become the most realistic and valuable exploration target at present.

       The Luojia area has a complex structural background, with the development of fault structures in the area, and the development of two sets of glutenite fans bodies of different origin, and the lithology difference is great. The diagenesis is complex and the calcareous intercalation is widely developed, which is of great significance for reservoir reconstruction.

        This paper takes the sand conglomerate of Es3 and Es4 members in Luojia area of Zhanhua Depression as the research object, synthesizes seismic, logging, core, analysis and test data, and carries out the research on the genetic types, sedimentary characteristics and diagenesis of the sand conglomerate controlled by different tectonic activities and provenance.

How to cite: yao, Y. and yang, Y.: Sedimentary Characteristics and Sedimentary Model of Glutenite Fans in Shahejie Formation, Luojia area, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2783, https://doi.org/10.5194/egusphere-egu25-2783, 2025.

vP2.7
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EGU25-3009
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ECS
Yuqian Li

The Permian Fengcheng Formation is an important hydrocarbon source rock development sequence and exploration sequence in the Junggar Basin. The Hashan tectonic belt, located on the northwestern margin of the Junggar Basin, is a large-scale thrust nappe superposed structure. Having undergone multiple tectonic movements and tectonic uplift and denudation, it has lost the stratigraphic distribution characteristics of a foreland basin. The Fengcheng Formation developed on multiple thrust tectonic steps, resulting in difficulties in stratigraphic correlation and unclear understanding of the distribution characteristics of the original sedimentary system and the development characteristics of favorable reservoirs. Therefore, clarifying the distribution laws and genesis of diagenesis and establishing a reservoir-forming model for high-quality reservoirs are of great significance for the effective sedimentary reservoir mechanism and the prediction of favorable gas-bearing areas in the study area.

How to cite: Li, Y.: Characteristics of Shale Reservoirs in the Permian Fengcheng Formation, Hashan Region , EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-3009, https://doi.org/10.5194/egusphere-egu25-3009, 2025.

vP2.8
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EGU25-4748
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ECS
Tiezheng Guo and Liqiang Zhang

On the basis of core observation and description, multi-scale microscopic analysis and related reservoir physical property analysis, the petrological characteristics, reservoir characteristics and diagenetic characteristics of the Lower Jurassic Sangonghe Formation in the central area of Junggar Basin are systematically studied, and the diagenetic evolution sequence of the reservoir is further established. The results show that the reservoir in the studied interval has undergone three diagenetic processes: compaction, cementation and dissolution during its development and evolution after burial. The reservoir mainly goes through two stages: early burial compaction and late tectonic compression. There are various types of cementation, including carbonate, siliceous, clay mineral, gypsum and anhydrite. The overall intensity of dissolution in the reservoir is low, and it mainly develops in the interior or edge of easily soluble components such as feldspar and rock cuttings, and also develops in the edge of clay mineral bonding. Diagenetic evolution sequence of the reservoir in the study area is as follows: early calcite cementation - early chlorite cementation - acid dissolution/quartz enlargement/kaolinite cementation - illite cementation - gypsum/anhydrite cementation - late calcite cementation - iron calcite/iron dolomite cementation, mechanical compaction has developed in the whole burial evolution process.

How to cite: Guo, T. and Zhang, L.: Reservoir characteristics and diagenetic evolution of Lower Jurassic Sangonghe Formation in the hinterland of Junggar Basin, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-4748, https://doi.org/10.5194/egusphere-egu25-4748, 2025.

vP2.9
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EGU25-7580
Tailiang Fan

Deep marine carbonate rocks in the Tarim Basin, Northwest China, have significant burial depths, ancient ages, and complex diagenetic evolution. Multi-stage tectonic activities and periodic sea-level changes create unconformities that expose carbonate rocks, resulting in interlayer, syn-sedimentary, and epigenetic karst systems. These processes, along with host rock composition and faulting, shape carbonate reservoir distribution and properties. Dissolution is most intense in shallow water grainstones and packstones, where fracturing enhances fluid flow, serving as both reservoirs and migration pathways. Consequently, carbonate reservoir characteristics in the northern Tarim Basin vary systematically from north to south, shaped by variations in unconformity size, diagenetic patterns and fault activity intensity, reflecting the basin’s evolution from deposition to deep burial. In the Yakela area, the northernmost region, significant uplift and erosion have exposed Cambrian, sometimes even Sinian bedrocks beneath Cretaceous layers, forming buried hill dolomite reservoirs. Moving south to the Tahe area, a paleokarstic erosion zone has developed large-scale dissolved fracture-cavity reservoirs due to the combined effects of faulting, surface karstification, and river system development near the base Carboniferous erosion surface. Further south, in the Tahe slope zone, reservoirs are shaped by a combination of dissolution and faulting, with bedding-parallel dissolution pores and enlarged fractures becoming more prominent as proximity to the paleoerosion surface decreases. This reflects a decrease in karstification intensity and an increase in fault-induced fluid pathways. In the Shunbei area where marine carbonates are deeply buried, structural features such as fault slip surfaces and open fractures dominate reservoir formation, with tectonic activity and fluid flow through fractures driving diagenetic alterations. The spatial variations in diagenetic pathways—from initial deposition and uplift in the north to deep burial in the south—highlight the interplay of dissolution, tectonics, and fluid migration across varying depths and time scales, providing insights into the mechanisms that control carbonate reservoir formation and evolution globally.

How to cite: Fan, T.: Orderly variations in the spatial and geological characteristics of carbonate reservoirs in the northern Tarim Basin, China, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-7580, https://doi.org/10.5194/egusphere-egu25-7580, 2025.

vP2.10
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EGU25-11788
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ECS
Xiaoxiao Yang, Chaoqun Wang, Wenying Jiang, and Daogong Hu

    A 39,000-year record of sedimentary environmental changes, based on high-resolution grain size and diatom records from core ZK13-22, in the eastern shore of the Dongzhaigang harbor, Hainan Island, make it possible to study the relationship between environmental changes in the study area and the sea level changes in the South China Sea.

    The results show that during the period from 39.4 to 15.3 ka B.P., the grain size of the core ZK13-22 sediments was relatively coarse, and no diatoms were observed in the corresponding layer, suggesting that the study area was mainly in a terrestrial environment. Between 15.3 to 10.3 ka B.P., the grain size decreased during post-glacial period, the plankton species (Cyclotella striata and Paralica sulcata), which are marine species living in estuarine areas, was above 70% on average. The content of the benthic species Nitzschia cocconeiformis reached as high as 17%, indicating a rise in sea level in the South China Sea, marine waters intruded onto the Dongzhaigang harbor and reached the core site, and during this transgressive interval, the study area changed into an intertidal environment. From 10.3 to 7.6 ka B.P., the sediment particle size reached its lowest value throughout the borehole, while the species diversity and abundance of diatoms peaked, dominated by eurythermal intertidal and coastal planktonic species, the core site generally showed a enhanced marine influence and reduced freshwater input, shallow marine environment developed in situ. Between 8.0 to 7.6 ka B.P., the content of Rhizosolenia bergonii peaked, suggesting that the sea water temperature and salinity were relatively high during this period, possibly related to the intensified warm currents in the region. Since 7.6 ka B.P., the grain size increased significantly, diatoms only appeared at 4.4 ka B.P.. During this period, the relative abundances of Cyclotella striata and Paralica sulcata in the sediments climbed to 29% and 26% respectively. This change indicates enhanced hydrodynamic conditions, increased riverine influence, and sea level fluctuating decreases. Correspondingly, the the core site gradually shifted to an estuarine-intertidal environment. During the period from 4.4 to 3 ka B.P., the sediment grain size increased sharply, the study area transitioned to a terrestrial depositional environment.

How to cite: Yang, X., Wang, C., Jiang, W., and Hu, D.: Environmental changes since 39 ka reflected by diatom in core sediments from Dongzhaigang Harbor, Hainan Island, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-11788, https://doi.org/10.5194/egusphere-egu25-11788, 2025.

vP2.11
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EGU25-7029
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ECS
Madineh kiani shahvandi, Mohammad Parandavar, and Petra Heinz

Calcareous nannofossils are essential for age dating and studying environmental changes. These microscopic (1–20µm) calcitic cell-wall fossils coverings are abundant in most post-Paleozoic marine sedimentary rocks, providing a continuous stratigraphic record of biotic change. This study aims to document the stratigraphic occurrence of calcareous nannofossils at the wide-spread shallow marine carbonates of related to the Qom Formation in the Nargesan, Band, and Qaleh-Gabri sections, southeast of Kerman province (East of Central Iran Basin). Samples were collected at 50-100cm intervals from the marly parts of the section to basal part of the Upper Red Formation. To preserve the small-sized coccoliths, samples were processed using simple smear slide method. The prepared slides were examined with an Olympus BX53 light microscope using cross-polarized light at a magnification 1500-2000X. Gypsum and Quartz plates were used to identify various species. In this study employed the standard calcareous nannofossil zonation by Martini 1971 for the Oligocene sediments. The studied interval ranges from the Lowest Appearance (LA) of Sphenolithus ciperoensis species to the Highest Appearance (HA) of the Sphenolithus distentus, corresponding to the NP24 zone defined by Martini 1971. The calcareous nannofossil assemblages exhibit moderate diversity and frequency, with moderately to well-preserved nannofossil specimens observed, such as: Sphenolithus ciperoensis, Sphenolithus conicus, Sphenolithus moriformis, Zygrhablithus bijugatus bijugatus, Helicosphaera recta, Helicosphaera euphratis, Reticulofenestra bisecta, Reticulofenestra dictyoda, Reticulofenestra minuta, Cyclicargolithus floridanus, Cyclicargolithus abisectus, Coccolithus pelagicus, Braarudosphaera bigelowii, etc. According to the above-mentioned calcareous nannofossil assemblages, the age of late Rupelian can be assigned for the studied samples from the surface sections. Furthermore, the high-resolution study of calcareous nannofossils indicates a significant decrease in the abundance and diversity of Oligocene nannofossils, mirroring trends observed at other low and middle latitudes sites. This record of calcareous nannofossils and bioevents provides valuable insights into the paleoenvironments of thatperiod. This research marks the first report of nannofossils from shallow-water carbonates (related to the Qom Formation) from Jiroft-Kerman area.

References

Martini, E. (1971) Standard Tertiary and Quaternary Calcareous Nannoplankton Zonation. Proceedings of the 2nd Planktonic Conference, Roma, 1970, 739-785.

How to cite: kiani shahvandi, M., Parandavar, M., and Heinz, P.: Investigation of shallow-water carbonate distributions related to the QomFormation in distant sections of the type area, southeast of Kerman, Iran: insight to calcareous nannofossils, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-7029, https://doi.org/10.5194/egusphere-egu25-7029, 2025.

vP2.12
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EGU25-2380
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ECS
Konstantinos Gkogkis and Manousos Valyrakis
A novel micro-hydroelectric system utilizing siphoning principles offers an innovative approach to small-scale renewable energy generation. This system harnesses the potential energy of water stored in an upstream tank, employing a siphon mechanism to create a flow rate greater than what would naturally occur in the watercourse.
 
The system comprises an upstream storage tank at a higher elevation, a siphon tube connecting the tank to a lower discharge point, a micro-turbine generator within the siphon tube, and a small-scale gearbox connected to the generator to improve efficiency at low speeds. Once primed, the siphon effect initiates a continuous water flow from higher to lower elevation.
 
This arrangement offers several advantages, including increased flow rate, controlled discharge, minimal environmental impact, and scalability for multiple installations in riverside areas. The system operates without harming riverbank ecosystems or wildlife and can be integrated into existing water storage systems. It also exploits previously non-viable energy sources, including ultra-low head applications, by utilizing the total head available below existing developments.
 
The higher flow rate achieved through siphoning enables the micro-turbine to generate more electricity than would be possible with natural water flow alone. This increased efficiency makes the system particularly suitable for remote or off-grid locations with limited hydroelectric potential.
 
Key considerations for implementation include careful sizing of components to match local topography and water availability, ensuring sufficient height differential between intake and discharge points, regular maintenance to prevent air locks and maintain siphon efficiency, and smart management of electricity production to address primarily local needs. This micro-hydroelectric siphon system may also serve as a possible alternative solution to high-risk environmental hydro projects.
 
In conclusion, this system may represent a promising solution for sustainable energy production in areas with modest water resources, offering enhanced power generation capabilities compared to conventional run-of-river schemes.

How to cite: Gkogkis, K. and Valyrakis, M.: Siphon-Enhanced Micro-Hydroelectric System: Harnessing Elevated Flow Rates for Improved Power Generation, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2380, https://doi.org/10.5194/egusphere-egu25-2380, 2025.

vP2.13
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EGU25-2558
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ECS
George Kaloudis and Manousos Valyrakis

This research explores the transport dynamics of floating macro-plastics in riverine environments using drones for monitoring. Controlled flume experiments were conducted to evaluate the roles of vegetation density and release position on the movement and retention of plastic debris. Aerial imagery (captured by a DJI Mini 3 drone) was analyzed to determine transport patterns, revealing that plastics released in central flow zones moved faster with lower retention, while those near densely vegetated riparian areas experienced slower transport and higher trapping rates.
The findings demonstrate drones’ effectiveness in monitoring plastic pollution, providing a practical alternative to traditional methods in areas difficult to access. These insights emphasize the critical role of riparian vegetation in influencing plastic movement and retention, offering opportunities to design interventions that target pollution hotspots [1,2]. The study highlights the promise of drone-based approaches in advancing our understanding of plastic transport processes and informs strategies to mitigate the environmental impacts of plastic waste. Future research could enhance these findings by integrating drone data with other monitoring systems and refining analytical techniques for natural environments.

References
[1] van Emmerik T, Roebroek CTJ, de Wit W, Krooshof E, van Zoelen C, Fujita Y, Bruinsma J, Treilles R, Kieu-Le TC, Elshafie A, Christensen ND, Biermann L, Hees J, Meijer LJJ (2023) Seasonal dynamics of riverine macroplastic pollution, Nature Water, 1, 51-58
 
[2] Valyrakis M, Gilja G, Liu D, Latessa G (2024) Transport of Floating Plastics through the Fluvial Vector: The Impact of Riparian Zones, Water, 16, 1098

How to cite: Kaloudis, G. and Valyrakis, M.: Harnessing Aerial Imaging Techniques to Monitor the Transport of Floating Macro-Plastics in Fluvial Systems, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-2558, https://doi.org/10.5194/egusphere-egu25-2558, 2025.

vP2.14
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EGU25-16062
Panagiotis Michalis, Fotios Konstantinidis, Tina Katika, Andreas Michalis, and Manousos Valyrakis

The built environment (BE) across various sectors faces significant challenges due to increasing deterioration, ageing infrastructure, extreme climatic conditions, rising urban populations, and limited financial resources [1]. Digital transformation offers the potential to revolutionize current practices for managing and sharing key information, improving decision-making processes and enabling more efficient and sustainable BE in the long term. However, despite recent advancements in technology, critical infrastructure systems within the BE continue to rely on traditional management approaches in terms of technology, organizational structure, and institutional frameworks. Consequently, they fail to fully leverage emerging technologies that could enable advanced resource and risk management through real-time data integration and enahnced analytical methods.

Adopting technologies associated with Infrastructure 4.0 (CI4.0) [2] can accelerate the digitalization of BE, with a particular focus on infrastructure systems. This study highlights the foundational elements of a next-generation BE designed to foster an interconnected and collaborative ecosystem focused on cities, infrastructure, and societies. Several case studies are explored, including large residential developments, transportation networks, and buildings, demonstrating the transformative potential of digitalization in delivering real-time information to stakeholders, thereby enhancing decision-making processes.

These efforts rely on the acquisition of real-time data from the environment to predict both current and future conditions of the BE. For instance, advanced microcontrollers are utilized to monitor the declining performance of ageing infrastructure over waterways and to measure flood levels in real-time. Datasets are processed on high-performance cloud-based systems, utilizing deep learning algorithms to forecast infrastructure conditions and climatic risks. In emergency scenarios, such as river overflows, flash floods, or infrastructure failures, the system generates timely alerts. Moreover, predictive models provide early warnings about infrastructure deterioration, enabling critical stakeholders to respond proactively and adapt societal operations accordingly.

References

[1] Michalis, P., Vintzileou, E. (2022). The Growing Infrastructure Crisis: The Challenge of Scour Risk Assessment and the Development of a New Sensing System. Infrastructures, 7(5), 68. https://doi.org/10.3390/infrastructures7050068

[2] Xu, Y., AlObaidi, K., Michalis, P. and Valyrakis, M. (2020). Monitoring the potential for bridge protections destabilization, using instrumented particles. Proceedings of the International Conference on Fluvial Hydraulics River Flow, Delft, The Netherlands, 7–10 July 2020; pp. 1-8. eBook ISBN 9781003110958.

How to cite: Michalis, P., Konstantinidis, F., Katika, T., Michalis, A., and Valyrakis, M.: Leveraging Digital-Physical Integration for Enhanced Infrastructure Management, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-16062, https://doi.org/10.5194/egusphere-egu25-16062, 2025.