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Zoidbergus, A New Genus of Apseudidae (Tanaidacea) with Remarks on Apseudes Siegi and Apseudes Vitjazi

Piotr Jóźwiak
Polish Polar Research | 2014 | No 2 | 389-414 | DOI: 10.2478/popore−2014−0020
Keywords Icelandic waters Apseudomorpha Apseudes Zoidbergus deep−sea
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Abstract

Zoidbergus , a new genus of Apseudidae, is described for deep−water Tanaidacea classified previously in the genus Apseudes : A. abyssalis , A. lagenirostris , A. paragracilis , A. tenuimanus , A. tenuis and A. vicinus . The new genus differs from Apseudes s. str. by having acute eyelobes without visual elements, elongated second article of mandibular palp, and carpus of pereopods 2–3 longer than or as long as propodus. Zoidbergus gen. n. can also be distinguished from Apseudes s. str. by the lack of large bases of pereopods 5–6 covered by numerous plumose setae as well as the lack of dense plumose setation on lateral margins of pereonites and pleonites. By general body habitus and structure of pereopods Zoidbergus gen. n. resembles the apseudid genus Leviapseudes , although the genera can be distinguished by the presence of leaf−shaped seta and elongated pereonites 3–6 in Leviapseudes . Based on specimens collected during the IceAGE1 Cruise in September 2011, Zoidbergus tenuis is redescribed and morphology of an undescribed species Zoidbergus sp. A is provided. Supplementary description for Zoidbergus vicinus is given based on type material from Statens Naturhistoriske Museum, University of Copenhagen. Additionally comments on the other deep water Apseudes species: A. siegi and A. vitjazi , are given.
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Authors and Affiliations

Piotr Jóźwiak

Dynamic States Equations of Transport Pipeline in Deep-Sea Mining

Jerzy Sobota Xia Jianxin Evgeniy Kirichenko
Archives of Mining Sciences | 2021 | vol. 66 | No 3 | 385-392 | DOI: 10.24425/ams.2021.138595
Keywords deep-sea mining vertical pipelines stability of deep-sea pipelines
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Abstract

The transport pipeline of lifting the underwater minerals to the surface of the water onto the ship during the movement of the vessel takes in the water a curved deformed shape. Analysis of the state of stability of the pipeline showed that if the flow velocity of fluid in the pipeline exceeds a certain critical value Vkr, then its small random deviations from the equilibrium position may develop into deviations of large amplitude. The cause of instability is the presence of the centrifugal force of the moving fluid mass, which occurs in places of curvature of the axis of the pipeline and seeks to increase this curvature when the ends of the pipeline are fixed. When the critical flow velocity is reached, the internal force factors become unable to compensate for the action of centrifugal force, as a result of that a loss of stability occurs. Equations describing this dynamic state of the pipeline are presented in the article.
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Bibliography

[1] Benjamin T .B. Dynamic of a system of articulated pipes conveying fluid. I Theory. Proc. Royal Soc. 261, 457-486 (1961), II Experiment, 487-99.
[2] Chung J .S., Bao-Rang Cheng, Huttelmaier H .P. Three-Dimensional Coupled Responses of a Vertical Deep-Ocean Pipe: Part II. Excitation at Pipe Top and External Torsion, International Journal of Offshore and Polar Engineering 4, 4, December 1994 (ISSN 1053-5381).
[3] Goman O.G., Kirichenko E.A., Vishnyak E.A. Calculation of hydrodynamic loads on the elements of submersible structures of deep-water slurry pipelines. System Technologies: A collection of scientific papers – Dnipropetrovsk: RVKIA Ukraine 8, 17-23 (1999) [in Russian].
[4] Gregory R .W., Paidoussis M .P. Unstable oscillation of turbular cantilevers, conveying fluid. I Theory. Proc. of the Royal Soc., London, Ser. A, 293, 528-542 (1966).
[5] Handelman H.M. Quart. Appl. Math. 13, 326-334 (1955).
[6] Kirichenko E.A. Possible cases of simplification of the system of equations of oscillations of deep-water slurry pipelines in a flat formulation. Mining, electromechanics and automatics: A collection of scientific papers – Dnipropetrovsk: RVKNGA of Ukraine 4, 137-142 (1999) [in Russian].
[7] Long R.H. Jr. Experimental and theoretical study of transverse vibration of a tube containing flowing fluid. J. App. Mech. 22, 1, 65-68 (1955).
[8] Niordson F .I.N. Vibrations of cylindrical tube containing flowing fluid. Trans. of the Royal Inst. of Tech., Stockholm, Sweden, 1953, No.73. 392
[9] Szelangiewicz T., Żelazny K., Buczkowski R., Computer simulations of deformations and tensions in the pipelines of hydraulic lifting systems, Scientific Journals of the Maritime University of Szczecin – Zeszyty Naukowe Akademii Morskiej w Szczecinie 52 (124), 37-44 (2017). DOI : https://doi.org/10.17402/243
[10] Yao Nijun, Cao Bin, Xia Jianxin, Pressure loss of flexible hose in deep-sea mining system. 18th International Conference on TRANSPORT AND SEDIMENTATION OF SOLID PARTICLES 11-15 September 2017, Prague, Czech Republic. ISBN 978-83-7717-269-8.
[11] Yu Hong-yun, Liu Shao-jun, Dynamics of vertical pipe in deep-ocean mining system, J. Cent. South Univ. Technol. (2007) 04-0552-05. DOI : https://doi.org/10.1007/s11771-007-0106-0
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Authors and Affiliations

Jerzy Sobota
1
ORCID: ORCID
Xia Jianxin
2
ORCID: ORCID
Evgeniy Kirichenko
3
ORCID: ORCID
  1. Wrocław University of E nvironmental and Life Sciences, Poland
  2. Minzu University of China, Beijing, China
  3. Mining University, Dnipropetrovsk, Ukraine

International Seabed Authority and Environmental Deep-Sea Stewardship – Principles Governing the Protection and Use of Seabed Resources

Maciej Nyka
Prawo Morskie | 2020 | No XXXIX | 9-20 | DOI: 10.24425/pm.2020.136456
Keywords Deep Sea Stewardship Deep Sea Mining International Seabed Authority Future Generations rights common heritage of mankind
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Abstract

The concept of intergenerational justice is deeply rooted into the regulation of activities in the Area. United Nations Convention on the Law of the Sea on many occasions stresses the need to protect the marine environment in the interest of both contemporary and future generations. One of the institutions with vast competences in this field is the International Seabed Authority. With a perspective on inevitable commercial exploration and exploitation of seabed resources there is a need to answer the question if the Seabed Authority is properly prepared both in the field of law and policy to act as a steward of a mankind? Which instruments has been developed to ensure sustainable use of seabed resources and which of them are at the disposal of the International Seabed Authority? Finally, are the standards of the protection of seabed environment sufficient to satisfy the needs of contemporary consumption without diminishing the ability of the mankind in the future to freely choose their path of development? We can assume that environmental standards which would protect the interest of future people would also secure the sustainability in contemporary use of common heritage at the Seas. International Seabed Authority and international law of the sea can play important role in this process by shaping the future of the mankind with actions undertaken today.
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Authors and Affiliations

Maciej Nyka
1
  1. University of Gdańsk (Poland), Economic Law and Environmental Protection Chair, Faculty of Law and Administration

Study on the Three-Phase Flow of the Water Transfer Export Elbow of Natural Gas Hydrate

Wei Chen Hai-liang Xu Bo Wu Fang-qiong Yang
Archives of Mining Sciences | 2022 | vol. 67 | No 2 | 239-258 | DOI: 10.24425/ams.2022.141456
Keywords deep-sea mining natural gas hydrates three-phase flow numerical simulation
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Abstract

The Euler multiphase flow and population equilibrium model were used to simulate the three-phase flow field in the bubble expansion stage of the outlet curved pipe section. The influence of the ratio of the bending diameter and the volume fraction of the gas phase on the pressure loss is revealed, and the safety range of the optimum bending diameter ratio and the volume fraction of the outlet gas phase is determined. The results show that the three-phase flow in the tube is more uniformly distributed in the vertical stage, and when the pipe is curved, the liquid-phase close to the pipe wall gathers along the pipe flank to the outside of the pipe, the solid phase is transferred along the pipe flank to the inside of the pipe, and the gas phase shrinks along the pipe flank to the inner centre. The maximum speed of each phase of the three-phase flow in the elbow is at the wall of the tube from 45° to 60° inside the elbow, and the distribution law along the axial direction of the pipe is about the same as the distribution law of volume fraction. The pressure loss of the elbow decreases with the increase of the bend diameter ratio, when the bend diameter ratio increases to 6, the pressure loss of the pipe decreases sharply, and the pressure loss decreases slowly with the increase of the bend diameter ratio. When the gas phase volume score in the elbow reaches 70%, there will be an obvious wall separation phenomenon, to keep the system in a stable working state and prevent blowout, the gas phase volume score should be controlled within 60%.
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Authors and Affiliations

Wei Chen
1 2 3
ORCID: ORCID
Hai-liang Xu
2 3
ORCID: ORCID
Bo Wu
2 3
ORCID: ORCID
Fang-qiong Yang
2 3
ORCID: ORCID
  1. Hunan University of Humanities, Department of Energy and Electrical Engineering, Science and Technology, Loudi, Hunan 417000, China
  2. Central South University, School of Mechanical and Electrical Engineering, Changsha, Hunan 410083, China
  3. State Key Laboratory of High Performance Complex Manufacturing, Changsha, Hunan 410083, China

Unusual echinoid resting trace records change in the position of the redox boundary (Palaeogene of the Lesser Caucasus in Georgia)

Alfred Uchman Zurab Lebanidze Nino Kobakhidze Tamar Beridze Davit Makadze Koba Lobzhanidze Sophio Khutsishvili Rusudan Chagelishvili Kakha Koiava Nino Khundadze
Acta Geologica Polonica | 2022 | vol. 72 | No 3 | 317-330 | DOI: 10.24425/agp.2022.140429
Keywords Ichnotaxonomy New ichnotaxa Irregular echinoids Deep sea Flysch Redoxboundary Oxygenation
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Abstract

The first recognition of a tracemaker responding to a temporary shift in the redox boundary is recognized. This is recorded by a new trace fossil, Sursumichnus orbicularis igen. et isp. nov., which is established for mound-like structures on the upper surfaces of sandstone beds from the Borjomi Flysch (upper Paleocene–lower Eocene) in the Lesser Caucasus (Georgia). It is connected with the spatangoid echinoid burrow Scolicia de Quatrefages, 1849 and interpreted as a resting trace of the same tracemaker produced after moving up from a deeper position within the sediment. The resting is caused by an episode of unfavourable conditions related to shallowing of the redox boundary. The trace fossil is a component of the Nereites ichnofacies.
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Authors and Affiliations

Alfred Uchman
1
Zurab Lebanidze
2
Nino Kobakhidze
3
Tamar Beridze
3
Davit Makadze
4
Koba Lobzhanidze
3
Sophio Khutsishvili
3
Rusudan Chagelishvili
5
Kakha Koiava
2
Nino Khundadze
4
  1. Faculty of Geography and Geology, Institute of Geological Sciences, Jagiellonian University, Gronostajowa3a, 30-387 Kraków, Poland
  2. Department of Geology, Faculty of Exact and Natural Sciences, Iv. Javakhishvili Tbilisi State University, University str. 13, 0186 Tbilisi, Georgia
  3. Alexander Janelidze Institute of Geology, Iv. Javakhishvili Tbilisi State University, Politkovskaia 31, 0186 Tbilisi, Georgia
  4. Alexander Tvalchrelidze Caucasian Institute of Mineral Resources, Tbilisi State University, 12 Mindeli str., 0186 Tbilisi, Georgia
  5. Department of Geology and Paleontology, Georgian National Museum, 3 Purtseladze str., 0105 Tbilisi, Georgia

EASAC Environmental Steering Panel – what's new in the Panel?

Rajmund Michalski
Nauka | 2023 | No 4 | 151-158 | DOI: 10.24425/nauka.2023.148232
Keywords EASAC environment forest biomass neonicotinoids regenerative agriculture deep sea mining
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Abstract

On 28 March 2023, the first ESP EASAC meeting in 2023 took place in Budapest at the invitation of the Hungarian Academy of Sciences. The broad and interesting range of issues addressed by Environmental Steering Panel should attract more interest also in Poland. Unfortunately, the activity in EASAC is pro publico bono, which is probably the main reason for the low activity of Polish scientists as experts invited to individual projects. Is the organisation referred to in this article credible? The answer is that, at the end of 2018, EASAC was awarded “Think Tank of the Year” by the prestigious Public Affairs Awards Europe. This shows that the activity is appreciated among professionals. I sincerely encourage anyone interested to find out more about what ESP EASAC is doing and to keep checking our activities.
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Authors and Affiliations

Rajmund Michalski
1
  1. Instytut Podstaw Inżynierii Środowiska PAN, Zabrze

Holocene climate dynamics in Sumba Strait, Indonesia: a preliminary evidence from high resolution geochemical records and planktonic foraminifera

Purna Sulastya Putra Septriono Hari Nugroho
Studia Quaternaria | 2020 | vol. 37 | Iss. 2 | 91-99 | DOI: 10.24425/sq.2020.133753
Keywords climate dynamics planktonic foraminifera Holocene deep-sea sediment Sumba Strait
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Abstract

The dynamics of climatic conditions during the Holocene in the Sumba Strait is not well known, compared with in the Indian Ocean. The aim of this paper is to identify the possible Holocene climate dynamics in Sumba Strait, eastern Indonesia by using deep-sea core sediments. A 243 cm core was taken aboard RV Baruna Jaya VIII during the Ekspedisi Widya Nusantara 2016 cruise. The core was analyzed for elemental, carbonate and organic matter content, and abundance of foraminifera. Based on geochemical and foraminifera data, we were able to identify at least six climatic changes during the Holocene in the Sumba Strait. By using the elemental ratio of terrigenous input parameter, we infer to interpret that the precipitation in the Sumba Strait during the Early Holocene was relatively higher compared with the Mid to Late Holocene.

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Authors and Affiliations

Purna Sulastya Putra
Septriono Hari Nugroho

Geodynamic setting of Scotia Sea and its effects on geomorphology of South Sandwich Trench, Southern Ocean

Polina Lemenkova
Polish Polar Research | 2021 | vol. 42 | No 1 | 1-23 | DOI: 10.24425/ppr.2021.136510
Keywords South Atlantic Ocean Scotia Sea Plate deep-sea trench GMT geology cartography
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Abstract

The South Sandwich Trench located eastward of the Drake Passage in the Scotia Sea between Antarctica and South America is one of the least studied deep-sea trenches. Its geomorphological formation and present shape formed under the strong influence of the tectonic plate movements and various aspects of the geological setting, i.e., sediment thickness, faults, fracture zones and geologic lineaments. The aim of this paper is to link the geological and geophysical setting of the Scotia Sea with individual geomorphological features of the South Sandwich Trench in the context of the phenomena of its formation and evolution. Linking several datasets (GEBCO, ETOPO1, EGM96, GlobSed and marine freeair gravity raster grids, geological vector layers) highlights correlations between various factors affecting deep-sea trench formation and development, using the Generic Mapping Tools (GMT) for cartographic mapping. The paper contributes to the regional studies of the submarine geomorphology in the Antarctic region with a technical application of the GMT cartographic scripting toolset.
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Authors and Affiliations

Polina Lemenkova
1
ORCID: ORCID
  1. Schmidt Institute of Physics of the Earth, Russian Academy of Sciences. Bolshaya Gruzinskaya St, 10, Bld. 1, Moscow, 123995, Russian Federation

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