Ausgaben

Zeitschriften und Ausgaben

Volumen 28 (2022): Heft 1 (April 2022)

Volumen 27 (2021): Heft 3 (December 2021)

Volumen 27 (2021): Heft 2 (August 2021)

Volumen 27 (2021): Heft 1 (April 2021)

Volumen 26 (2020): Heft 3 (December 2020)

Volumen 26 (2020): Heft 2 (August 2020)

Volumen 26 (2020): Heft 1 (April 2020)

Volumen 25 (2019): Heft 3 (December 2019)

Volumen 25 (2019): Heft 2 (August 2019)

Volumen 25 (2019): Heft 1 (April 2019)

Volumen 24 (2018): Heft 3 (December 2018)

Volumen 24 (2018): Heft 2 (August 2018)

Volumen 24 (2018): Heft 1 (March 2018)

Volumen 23 (2017): Heft 3 (December 2017)

Volumen 23 (2017): Heft 2 (June 2017)

Volumen 23 (2017): Heft 1 (March 2017)

Volumen 22 (2016): Heft 3 (September 2016)

Volumen 22 (2016): Heft 2 (June 2016)

Volumen 22 (2016): Heft 1 (March 2016)

Volumen 21 (2015): Heft 4 (December 2015)

Volumen 21 (2015): Heft 3 (September 2015)

Volumen 21 (2015): Heft 2 (June 2015)

Volumen 21 (2015): Heft 1 (March 2015)

Volumen 20 (2014): Heft 4 (December 2014)

Volumen 20 (2014): Heft 3 (September 2014)

Volumen 20 (2014): Heft 2 (June 2014)

Volumen 20 (2014): Heft 1 (March 2014)

Volumen 19 (2013): Heft 4 (December 2013)

Volumen 19 (2013): Heft 3 (September 2013)

Volumen 19 (2013): Heft 1-2 (May 2013)
Heavy-mineral analysis as a tool in earth-scientific research

Volumen 18 (2012): Heft 4 (December 2012)

Volumen 18 (2012): Heft 3 (October 2012)

Volumen 18 (2012): Heft 2 (August 2012)

Volumen 18 (2012): Heft 1 (March 2012)

Volumen 17 (2011): Heft 4 (December 2011)

Volumen 17 (2011): Heft 3 (September 2011)

Volumen 17 (2011): Heft 2 (June 2011)

Volumen 17 (2011): Heft 1 (April 2011)

Volumen 16 (2010): Heft 4 (December 2010)

Volumen 16 (2010): Heft 3 (October 2010)

Volumen 16 (2010): Heft 2 (June 2010)

Volumen 16 (2010): Heft 1 (April 2010)

Volumen 15 (2009): Heft 3-4 (December 2009)

Zeitschriftendaten
Format
Zeitschrift
eISSN
2080-6574
Erstveröffentlichung
24 Dec 2009
Erscheinungsweise
3 Hefte pro Jahr
Sprachen
Englisch

Suche

Volumen 28 (2022): Heft 1 (April 2022)

Zeitschriftendaten
Format
Zeitschrift
eISSN
2080-6574
Erstveröffentlichung
24 Dec 2009
Erscheinungsweise
3 Hefte pro Jahr
Sprachen
Englisch

Suche

7 Artikel
Uneingeschränkter Zugang

Geological and palaeogeographical peculiarities of the Adamów Graben area, central Poland

Online veröffentlicht: 14 May 2022
Seitenbereich: 1 - 17

Zusammenfassung

Abstract

From a geological and palaeogeographical point of view, the area of the Adamów Graben in the vicinity of Turek ranks amongst the best known in central Poland, with several opencast mines located here where lignite was exploited for 57 years. These large-surface exposures provide a good opportunity for detailed geological studies of strata of Late Cretaceous to Holocene age. However, the present research focuses mainly on those deposits, forms and structures that have been most thoroughly examined and are best exposed. These are Cretaceous marls and gaizes, Paleogene ‘blue clays’ and the ‘Koźmin Gravels’, Neogene sandstones, as well as the Quaternary glacial ‘Lake Koźmin’, involutions and ‘Koźmin Las’. Some of these, e.g., the ‘Koźmin Gravels’ and ‘Koźmin Las’, are not known from other Polish territories. Furthermore, results obtained by the authors over a period of nearly 30 years also include data on palaeogeographical changes across some Cenozoic intervals, especially during the early Oligocene and late Weichselian.

Schlüsselwörter

  • marine rocks
  • Oligocene clays
  • Oligocene pebbles
  • Miocene sandstones
  • glacial lake
  • periglacial involutions
  • fossil forest
Uneingeschränkter Zugang

Tectonomagmatic settings of Jurassic granitoids in the Sanandaj-Sirjan Zone, Iran: A review

Online veröffentlicht: 14 May 2022
Seitenbereich: 19 - 37

Zusammenfassung

Abstract

The present paper discusses the geochemical affinities, origin and ages of Jurassic granitoids of the Sanandaj-Sirjan Zone (SaSZ) in the eastern part of the Zagros Thrust Zone. A multidisciplinary, integrated approach was carried out using existing granitoid geochemical data (major, trace, rare earth element and isotopes) and knowledge of the regional geology (geodynamic and metamorphic setting), coupled with geophysical data (magnetic susceptibility) from granitoids in the SaSZ. We re-interpret and re-classify the Jurassic granitoids of this zone into three main genetic groups: S-type, I-type and A-type subduction-related ones. In the central to southern part of the Sanandaj-Sirjan zone (between Hamadan and Sirjan), S-type magmatism appeared between 178 and 160 Ma during the Cimmerian orogeny, due to continental collision. To the north of the Sanandaj-Sirjan zone (between Sanandaj and Ghorveh), I-type and A-type magmatism occurred between 158 and 145 Ma. This heterogenic tectonomagmatic system along the SaSZ suggests a heterogenic subcontinental lithospheric mantle, resulting in two Jurassic tectonomagmatic zones of (1) the Sanandaj-Ghorveh Zone and (2) the Hamadan-Sirjan Zone.

Schlüsselwörter

  • Geochemical data
  • geophysical data
  • Jurassic magmatism
  • Sanandaj-Ghorveh Zone
  • Hamadan-Sirjan Zone
Uneingeschränkter Zugang

Characterisation of potholes formed on bedrock sandstones at Loei Dun, Phetchabun Geopark, Thailand

Online veröffentlicht: 14 May 2022
Seitenbereich: 39 - 50

Zusammenfassung

Abstract

Phetchabun National Geopark comprises varied geosites; one of the fluvial bedrock landforms distinguished here is Loei Dun. This shows many potholes in Mesozoic sandstone of the Nam Phong Formation (Khorat Group). A genetic study of the occurrence of the Loei Dun potholes lends it a higher geoheritage value. For the present study we did fieldwork and carried out petrographical and geotechnical analyses so as to classify and characterise the potholes and consider geotourism potentials. Petrographically, the bedrock sandstone is a lithic arenite which consists of 82-96 percent very fine to coarse, well-sorted subangular sand with low sphericity and calcite cementation. Our geotechnical analysis of the bedrock sandstone suggests that pothole occurrence may be linked to low rock strength and slake durability index with high rock absorption and porosity at Loei Dun. Field studies confirmed the impact of other factors such as joints/faults, fluvial conditions and biological weathering. There are five types of pothole, viz., simple ones, potholes with external furrows, compound potholes, breached potholes and lateral ones. The present study adds educational value to the Loei Dun geosite at Phetchabun Geoparks and cultural and economic aspects can be further strengthened through the development of geotourism in the area.

Schlüsselwörter

  • geomorphology
  • landforms
  • geotourism
  • lithic arenite
  • geoheritage
  • Mesozoic
  • Nam Phong Formation
Uneingeschränkter Zugang

Bank filtration for climate resilience: potentiality of a new site along the Ismailia Canal in Egypt

Online veröffentlicht: 14 May 2022
Seitenbereich: 51 - 60

Zusammenfassung

Abstract

Bank filtration (BF) is a nature-based solution that can provide safe drinking water at a low cost, in being a green technology that benefits from natural ecosystem services and saves energy as well. The objective of the present paper is to evaluate the potentiality of a new site for bank filtration along a surface water source that experiences periods of both high and low flow. This site is located along the Ismailia Canal in the eastern Nile Delta fringe of Egypt. The present evaluation is based on exploratory drilling, installation of monitoring infrastructure and monitoring of both water level and water quality parameters for one year. The site has favourable hydrogeological conditions; the mean hydraulic conductivity of aquifer materials (sand and gravel) is 18.98 m/day. Moreover, there is a hydraulic connection between canal and aquifer; under steady conditions, the canal feeds the aquifer. Using different tracers, such as Cl, EC, Sr and SO4, the average bank filtration share is in excess of 95%. BF has reduced the particulates (turbidity) by 96%, total coliform by 99 % and total organic carbon (TOC) expressed as ultra-violet absorbance at 254 wavelengths (UVA254) by 44%. In addition, BF reduces concentrations of disinfection by-products due to its ability to remove organic matter. The potential degradation of TOC in the canal bed sediments may cause the release of iron (Fe) and manganese (Mn) to the bank filtrate water; this process is exaggerated during low-flow periods. Compared to conventional water treatment, BF is a cost-effective green technology, because no chemicals are used and no waste products are generated.

Schlüsselwörter

  • Green technology
  • low flow
  • drinking water
  • water quality
  • residence time
Uneingeschränkter Zugang

Textural characteristics, mode of transportation and depositional environment of the Stormberg Group in the Eastern Cape, South Africa: evidence from grain size and lithofacies analyses

Online veröffentlicht: 14 May 2022
Seitenbereich: 61 - 78

Zusammenfassung

Abstract

The Stormberg Group comprises the Molteno, Elliot and Clarens formations and is one of four stratigraphical groups that make up the Karoo Supergroup in South Africa. The group is the highest unit in the Karoo Basin, representing the final phase of preserved sedimentation. The major problem with the Stromberg Group is that the mode of transport, hydrodynamic energy conditions and depositional environment are still poorly understood. For the present paper, grain size and lithofacies studies on selected sandstones from the Molteno, Elliot and Clarens formations were performed so as to elucidate their textural characteristics, depositional processes, sedimentation mechanisms and hydrodynamic energy conditions and to discriminate different depositional environments. The statistical parameters of grain size distribution (mean grain size, standard deviation, skewness and kurtosis) show that the sandstones are predominantly unimodal, fine grained, moderately well sorted, mesokurtic and near symmetrical. The bivariate diagrams of the aforementioned statistical parameters demonstrate that river and aeolian dune had the greatest impact on the depositional environments. Likewise, the C-M pattern (Passega diagram) shows that the sandstones were mostly deposited through tractive current process. Furthermore, the C-M diagram reveals the prevalence of rolling, suspension and graded suspension modes of sediment transportation. Seventeen sedimentary lithofacies were identified and grouped into seven lithofacies associations. These lithofacies associations indicate braided channel, overbank and swamp deposits for the Molteno Formation, alluvial fan/floodplain and playa deposits for the Elliot Formation and aeolian deposits for the Clarens Formation.

Schlüsselwörter

  • Grain size distribution
  • textural parameters
  • lithofacies classification
  • hydrodynamic energy conditions
  • Triassic
  • Jurassic
Uneingeschränkter Zugang

Book reviews: The Nile Basin: Quaternary geology, geomorphology and prehistoric environments, by Martin Williams, University of Adelaide, 2019. Cambridge University Press, Cambridge, UK. Hardback: price £105.00, ISBN: 9781107179196

Online veröffentlicht: 14 May 2022
Seitenbereich: 79 - 80

Zusammenfassung

Uneingeschränkter Zugang

Coastal hydrogeology, by Jiao Jimmy and Vincent Post, 2019. Cambridge University Press, Cambridge, UK. 403 pages. Hardback: price £49.99, ISBN: 9781107030596.

Online veröffentlicht: 14 May 2022
Seitenbereich: 81 - 82

Zusammenfassung

7 Artikel
Uneingeschränkter Zugang

Geological and palaeogeographical peculiarities of the Adamów Graben area, central Poland

Online veröffentlicht: 14 May 2022
Seitenbereich: 1 - 17

Zusammenfassung

Abstract

From a geological and palaeogeographical point of view, the area of the Adamów Graben in the vicinity of Turek ranks amongst the best known in central Poland, with several opencast mines located here where lignite was exploited for 57 years. These large-surface exposures provide a good opportunity for detailed geological studies of strata of Late Cretaceous to Holocene age. However, the present research focuses mainly on those deposits, forms and structures that have been most thoroughly examined and are best exposed. These are Cretaceous marls and gaizes, Paleogene ‘blue clays’ and the ‘Koźmin Gravels’, Neogene sandstones, as well as the Quaternary glacial ‘Lake Koźmin’, involutions and ‘Koźmin Las’. Some of these, e.g., the ‘Koźmin Gravels’ and ‘Koźmin Las’, are not known from other Polish territories. Furthermore, results obtained by the authors over a period of nearly 30 years also include data on palaeogeographical changes across some Cenozoic intervals, especially during the early Oligocene and late Weichselian.

Schlüsselwörter

  • marine rocks
  • Oligocene clays
  • Oligocene pebbles
  • Miocene sandstones
  • glacial lake
  • periglacial involutions
  • fossil forest
Uneingeschränkter Zugang

Tectonomagmatic settings of Jurassic granitoids in the Sanandaj-Sirjan Zone, Iran: A review

Online veröffentlicht: 14 May 2022
Seitenbereich: 19 - 37

Zusammenfassung

Abstract

The present paper discusses the geochemical affinities, origin and ages of Jurassic granitoids of the Sanandaj-Sirjan Zone (SaSZ) in the eastern part of the Zagros Thrust Zone. A multidisciplinary, integrated approach was carried out using existing granitoid geochemical data (major, trace, rare earth element and isotopes) and knowledge of the regional geology (geodynamic and metamorphic setting), coupled with geophysical data (magnetic susceptibility) from granitoids in the SaSZ. We re-interpret and re-classify the Jurassic granitoids of this zone into three main genetic groups: S-type, I-type and A-type subduction-related ones. In the central to southern part of the Sanandaj-Sirjan zone (between Hamadan and Sirjan), S-type magmatism appeared between 178 and 160 Ma during the Cimmerian orogeny, due to continental collision. To the north of the Sanandaj-Sirjan zone (between Sanandaj and Ghorveh), I-type and A-type magmatism occurred between 158 and 145 Ma. This heterogenic tectonomagmatic system along the SaSZ suggests a heterogenic subcontinental lithospheric mantle, resulting in two Jurassic tectonomagmatic zones of (1) the Sanandaj-Ghorveh Zone and (2) the Hamadan-Sirjan Zone.

Schlüsselwörter

  • Geochemical data
  • geophysical data
  • Jurassic magmatism
  • Sanandaj-Ghorveh Zone
  • Hamadan-Sirjan Zone
Uneingeschränkter Zugang

Characterisation of potholes formed on bedrock sandstones at Loei Dun, Phetchabun Geopark, Thailand

Online veröffentlicht: 14 May 2022
Seitenbereich: 39 - 50

Zusammenfassung

Abstract

Phetchabun National Geopark comprises varied geosites; one of the fluvial bedrock landforms distinguished here is Loei Dun. This shows many potholes in Mesozoic sandstone of the Nam Phong Formation (Khorat Group). A genetic study of the occurrence of the Loei Dun potholes lends it a higher geoheritage value. For the present study we did fieldwork and carried out petrographical and geotechnical analyses so as to classify and characterise the potholes and consider geotourism potentials. Petrographically, the bedrock sandstone is a lithic arenite which consists of 82-96 percent very fine to coarse, well-sorted subangular sand with low sphericity and calcite cementation. Our geotechnical analysis of the bedrock sandstone suggests that pothole occurrence may be linked to low rock strength and slake durability index with high rock absorption and porosity at Loei Dun. Field studies confirmed the impact of other factors such as joints/faults, fluvial conditions and biological weathering. There are five types of pothole, viz., simple ones, potholes with external furrows, compound potholes, breached potholes and lateral ones. The present study adds educational value to the Loei Dun geosite at Phetchabun Geoparks and cultural and economic aspects can be further strengthened through the development of geotourism in the area.

Schlüsselwörter

  • geomorphology
  • landforms
  • geotourism
  • lithic arenite
  • geoheritage
  • Mesozoic
  • Nam Phong Formation
Uneingeschränkter Zugang

Bank filtration for climate resilience: potentiality of a new site along the Ismailia Canal in Egypt

Online veröffentlicht: 14 May 2022
Seitenbereich: 51 - 60

Zusammenfassung

Abstract

Bank filtration (BF) is a nature-based solution that can provide safe drinking water at a low cost, in being a green technology that benefits from natural ecosystem services and saves energy as well. The objective of the present paper is to evaluate the potentiality of a new site for bank filtration along a surface water source that experiences periods of both high and low flow. This site is located along the Ismailia Canal in the eastern Nile Delta fringe of Egypt. The present evaluation is based on exploratory drilling, installation of monitoring infrastructure and monitoring of both water level and water quality parameters for one year. The site has favourable hydrogeological conditions; the mean hydraulic conductivity of aquifer materials (sand and gravel) is 18.98 m/day. Moreover, there is a hydraulic connection between canal and aquifer; under steady conditions, the canal feeds the aquifer. Using different tracers, such as Cl, EC, Sr and SO4, the average bank filtration share is in excess of 95%. BF has reduced the particulates (turbidity) by 96%, total coliform by 99 % and total organic carbon (TOC) expressed as ultra-violet absorbance at 254 wavelengths (UVA254) by 44%. In addition, BF reduces concentrations of disinfection by-products due to its ability to remove organic matter. The potential degradation of TOC in the canal bed sediments may cause the release of iron (Fe) and manganese (Mn) to the bank filtrate water; this process is exaggerated during low-flow periods. Compared to conventional water treatment, BF is a cost-effective green technology, because no chemicals are used and no waste products are generated.

Schlüsselwörter

  • Green technology
  • low flow
  • drinking water
  • water quality
  • residence time
Uneingeschränkter Zugang

Textural characteristics, mode of transportation and depositional environment of the Stormberg Group in the Eastern Cape, South Africa: evidence from grain size and lithofacies analyses

Online veröffentlicht: 14 May 2022
Seitenbereich: 61 - 78

Zusammenfassung

Abstract

The Stormberg Group comprises the Molteno, Elliot and Clarens formations and is one of four stratigraphical groups that make up the Karoo Supergroup in South Africa. The group is the highest unit in the Karoo Basin, representing the final phase of preserved sedimentation. The major problem with the Stromberg Group is that the mode of transport, hydrodynamic energy conditions and depositional environment are still poorly understood. For the present paper, grain size and lithofacies studies on selected sandstones from the Molteno, Elliot and Clarens formations were performed so as to elucidate their textural characteristics, depositional processes, sedimentation mechanisms and hydrodynamic energy conditions and to discriminate different depositional environments. The statistical parameters of grain size distribution (mean grain size, standard deviation, skewness and kurtosis) show that the sandstones are predominantly unimodal, fine grained, moderately well sorted, mesokurtic and near symmetrical. The bivariate diagrams of the aforementioned statistical parameters demonstrate that river and aeolian dune had the greatest impact on the depositional environments. Likewise, the C-M pattern (Passega diagram) shows that the sandstones were mostly deposited through tractive current process. Furthermore, the C-M diagram reveals the prevalence of rolling, suspension and graded suspension modes of sediment transportation. Seventeen sedimentary lithofacies were identified and grouped into seven lithofacies associations. These lithofacies associations indicate braided channel, overbank and swamp deposits for the Molteno Formation, alluvial fan/floodplain and playa deposits for the Elliot Formation and aeolian deposits for the Clarens Formation.

Schlüsselwörter

  • Grain size distribution
  • textural parameters
  • lithofacies classification
  • hydrodynamic energy conditions
  • Triassic
  • Jurassic
Uneingeschränkter Zugang

Book reviews: The Nile Basin: Quaternary geology, geomorphology and prehistoric environments, by Martin Williams, University of Adelaide, 2019. Cambridge University Press, Cambridge, UK. Hardback: price £105.00, ISBN: 9781107179196

Online veröffentlicht: 14 May 2022
Seitenbereich: 79 - 80

Zusammenfassung

Uneingeschränkter Zugang

Coastal hydrogeology, by Jiao Jimmy and Vincent Post, 2019. Cambridge University Press, Cambridge, UK. 403 pages. Hardback: price £49.99, ISBN: 9781107030596.

Online veröffentlicht: 14 May 2022
Seitenbereich: 81 - 82

Zusammenfassung

Planen Sie Ihre Fernkonferenz mit Scienceendo