A compiled open-access geological map of Dronning Maud Land, Antarctica

2021 ◽  
Author(s):  
Tamer Abu-Alam ◽  
Synnøve Elvevold
Keyword(s):  
South Africa ◽  
Open Access ◽  
Indian Subcontinent ◽  
Geological Mapping ◽  
Landsat 8 ◽  
Scale Level ◽  
Tectonic Model ◽  
Dronning Maud Land ◽  
Geological Map ◽  
Norwegian Polar Institute

<p>Geological mapping and investigation of the mountain chain in Dronning Maud Land (DML) has been carried out by a number of geologists from South Africa, Japan, India, Germany, Russia and Norway over the last 40-50 years. The produced geological maps of these teams are, for a large part, based on fairly old data which makes these maps inhomogeneous. The maps are at different scales, contain different levels of details, and the standards for classification of the rock units may also differ between the maps. This limits the ability to use these maps to draw an overview tectonic model of the evolution of Dronning Maud Land.</p><p>In this contribution, we present a newly compiled geological map and GIS database of the Dronning Maud Land. The map will be available soon as an open-access database, but the readers can test a test version of it at: https://geokart.npolar.no/Html5Viewer/index.html?viewer=Geology_DML. The geological importance of the Dronning Maud Land to understanding the evolution of the southern parts of the Gondwana supercontinent was the main motivation factor as the DML is considered as the missing link between the geology of South Africa, Australia and Indian subcontinent.</p><p>The new database covers the area between 20<sup>o</sup> W and 45<sup>o</sup> E and was compiled at a scale level of 1:250 000. However, the database provides another scale level of 1:5 000 000 to put the DML in the regional framework of the Gondwana. The geological map is descriptive based on the new topographic dataset of the Landsat 8. The project was based at the Norwegian Polar Institute from 2014 to 2018 and supported by a research grant from the Ministry of Foreign Affairs, Norway.</p>

scholarly journals Análise multiespacial para mapeamento geológico: estudo de caso no corpo gabróico-granítico, Faixa de Dobramentos Sergipana / Multispacial analytics to geological mapping: case study at gabroic-granitic body, Sergipano Fold Belt

2018 ◽  
Vol 28 (53) ◽  
pp. 337-361
Author(s):  
Lauro Roberto De Jesus Rosa ◽  
Adriane Machado ◽  
Cristine Lenz ◽  
Luciana Oliveira dos Santos ◽  
Lucas Santana Menezes
Keyword(s):  
Remote Sensing ◽  
Satellite Images ◽  
Geological Mapping ◽  
Igneous Rocks ◽  
Landsat 8 ◽  
Fold Belt ◽  
Mixing Processes ◽  
Geological Map ◽  
Gis Software

Novos dados geológicos foram obtidos em um corpo gabróico-granítico na Faixa de Dobramentos Sergipana (Capela, SE), utilizando as técnicas de sensoriamento remoto e geoprocessamento integradas, em uma escala de semi-detalhe (1: 30.000). Esse corpo é constituído de um conjunto de rochas ígneas, compostas principalmente por gabros, ocorrendo ainda quartzo-dioritos e granodioritos. Nesse estudo, foram utilizados dados de magnetometria, de imagens de satélite Landsat 8 e dados TOPODATA, geoprocessados no software Quantum Gis. As informações obtidas, associadas a dados de trabalhos de campo, permitiram a identificação de novas litologias e estruturas, o que levou a uma melhor delimitação desse pluton no campo e a obtenção de um novo mapa geológico da região estudada. Com essas informações, foi possível concluir que o corpo estudado é resultado de vários pulsos magmáticos, associados a processos de mistura de magmas, que originaram uma grande variedade de rochas ígneas na área. Palavras-Chave: Sensoriamento Remoto, Geoprocessamento, Corpo Gabróico-Granítico.AbstractNew lithological data were obtained of a gabbroic-granitic body in Sergipano Fold Belt (Capela, SE), using remote sensing and geoprocessing as integrated techniques in a semi-detail scale (1:30,000). This body is composed of a number of igneous rocks, mainly gabbros, besides quartz-diorites and granodiorites. In this study, it was used magnetometry data, satellite images of Landsat 8 and TOPODATA data, geoprocessed in Quantum Gis software. With these data, coupled with information obtained in fieldworks, it was possible to identify new lithologies and structures, and as a consequence, to obtain a better field limits for this igneous pluton and a new geological map of the studied area. It is possible to conclude that these rocks are the result of many magmatic pulses, with several mixing processes, which originated a great variety of igneous rocks in the area.Keyword:. Remote sensing, Geoprocessing, Gabbroic-Granitic body.

THE STATE OF OPEN ACCESS ADOPTION IN LEGAL SCHOLARLY COMMUNICATION: AN ANALYSIS OF SELECTED OPEN ACCESS RESOURCES

Mousaion ◽  
2016 ◽  
Vol 34 (1) ◽  
pp. 83-100
Author(s):  
Solomon Bopape
Keyword(s):  
South Africa ◽  
Open Access ◽  
Open Access Publishing ◽  
The Internet ◽  
Free Access ◽  
Access To Information ◽  
Legal Information ◽  
Scholarly Literature ◽  
Open Access Resources ◽  
The Right

The study of law focuses, among other aspects, on important issues relating to equality, fairness and justice in as far as free access to information and knowledgeis concerned. The launching of the Open Access to Law Movement in 1992, the promulgation of the Durham Statement on Open Access to Legal Scholarshipin 2009, and the formation of national and regional Legal Information Institutes (LIIs) should serve as an indication of how well the legal world is committed to freely publishing and distributing legal information and knowledge through the Internet to legal practitioners, legal scholars and the public at large aroundthe world. In order to establish the amount of legal scholarly content which is accessible through open access publishing innovations and initiatives, this studyanalysed the contents of websites for selected open access resources on the Internet internationally and in South Africa. The results of the study showed that there has been a steady developing trend towards the adoption of open access for legal scholarly literature internationally, while in South Africa legal scholarly literature is under the control of commercial publishers. This should be an issue for the legal scholarship which, among its focus, is to impart knowledge about the right of access to information and knowledge.

scholarly journals The Skjoldungen map sheet: completion of the 1:500 000 geological mapping of South-East Greenland

1991 ◽  
Vol 152 ◽  
pp. 30-31
Author(s):  
J.C Escher
Keyword(s):  
Geological Mapping ◽  
The Other ◽  
Geological Survey ◽  
East Greenland ◽  
Metamorphic Development ◽  
Geological Map ◽  
Map Series

The publication of the 1:500 000 Skjoldungen map sheet (Escher, 1990; Fig. 1) marks the completion of the Geological Survey of Greenland's (GGU's) reconnaissance mapping activities in South-East Greenland. A descriptive text to the map is under preparation. All of South-East Greenland between Kap Farvel (59° 00´N) and Mesters Vig (72° 00´N) is now covered by sheets of the 1:500 000 geological map series of Greenland. Five sheets in the series (nos 5,6,9, 10 and 11) remain to be published (Fig. 1); the Thule map sheet (sheet 5) will be printed in the course of 1991, and sheet 10 is under compilation. The presentation of the Skjoldungen map is somewhat different from that of the other 1:500 000 maps inthe series. In addition to traditional lithological information, an effort has been made to show the tectonic/metamorphic development of the region during the Archaean and Proterozoic.

scholarly journals Regional geology and 1:500 000 mapping in North-East Greenland

1990 ◽  
Vol 148 ◽  
pp. 16-20
Author(s):  
N Henriksen
Keyword(s):  
Geological Mapping ◽  
Fold Belt ◽  
East Greenland ◽  
Regional Geology ◽  
Field Mapping ◽  
North East ◽  
General Geology ◽  
Geological Map

A three-year field mapping programme was initiated in 1988 aiming at regional geological studies and geological mapping in North-East Greenland between latitudes 75° and 78°N. This region encompasses relatively little known parts of the Caledonian fold belt and the overlying post-Caledonian sequences, which lie north of the better known regions of central East Greenland (Henriksen, 1989). Major aims of the programme include compilation a 1:500 000 geological map, and an understanding of the general geology of the region.

scholarly journals Remote predictive geological mapping as a tool for the reconstruction of the complex geodynamic evolution of Melanesia

2020 ◽  
Author(s):  
Philipp Brandl ◽  
Anna Kraetschell ◽  
Justin Emberley ◽  
Mark Hannington ◽  
Margaret Stewart ◽  
...  
Keyword(s):  
Large Scale ◽  
Solomon Islands ◽  
Sedimentary Cover ◽  
Complete Information ◽  
Geological Mapping ◽  
Geophysical Data ◽  
Geodynamic Evolution ◽  
Predictive Mapping ◽  
Lithostratigraphic Units ◽  
Geological Map

<p>The offshore regions of Eastern Papua New Guinea and the Solomon Islands include several active and remnant arc and backarc systems that formed in response to complex plate tectonic adjustments following subduction initiation in the Eocene. Although there has been extensive exploration for offshore petroleum resources, and more than 54 research cruises have investigated or transited the region since 1993, a comprehensive regional geological map, including the deep marine areas, has not been available at a scale that permits quantitative analysis of the basin history. We present the first map that depicts interpreted assemblage- and formation-level lithostratigraphic units correlated across the marine basins and adjacent land masses. The mapped assemblages and large-scale formations are based on a compilation of land-based geological maps, marine geophysical data (hydroacoustics, magnetics, and gravity) integrated with the results of geological sampling, ocean drilling, seismic surveys, and seabed observations.</p><p>More than 400,000 km<sup>2 </sup>of the map area covered by ship-based multibeam and other geophysical data were inspected to derive the offshore geological units. In areas with limited data, the units were extrapolated from well-documented formations in adjacent regions with more complete information, including on land. This approach follows closely the techniques used for remote predictive mapping in other regions of the Earth where geological information is sparse. Geological boundaries were constrained by ship-based multibeam data reprocessed at 35-m to 50-m resolution and integrated with the Global Multi-Resolution Topography (GMRT) gridded at 100 m. Lithotectonic assemblages were assigned on the basis of plate structure, crustal type and thickness, age, composition, and sedimentary cover and further refined by bathymetric and geophysical data from the literature and cruise reports. The final compilation is generalized and presented here at 1:1 М. Our new approach integrates conventional mapping on land with remote predictive mapping of the ocean floor.</p><p>The newly compiled geological map illustrates the diversity of assemblages in the region and its complex geodynamic evolution. The resolution of our map allows to perform quantitative analyses of area-age relationships and thus crustal growth. Further geoscientific analyses may allow to estimate the regional mineral potential and to delineate permissive areas as future exploration targets.</p>

FROM THE EDITOR

2020 ◽  
Vol 40 (1) ◽  
Author(s):  
Henning Melber
Keyword(s):  
South Africa ◽  
Open Access ◽  
Open Access Journal ◽  
Advisory Board ◽  
Editorial Responsibility ◽  
Strategic Review ◽  
Wide Range ◽  
The Subject ◽  
The Right ◽  
New Generation

With issue No 1/2013, this journal changed in several respects. Under a new editor-in-chief, the Strategic Review for Southern Africa, then published for 35 years, turned into an open access journal with a redesigned look. But the makeoveraimed at more than merely cosmetic changes. As outlined in the introduction of that issue, the changing context both in South Africa as well as globally, motivated a conceptual re-positioning, that also modified the subject-related thematic framework1).  Since then, thanks to many contributors offering a wide range of topicalanalyses, we hopefully managed to live up to at least some of the expectations created. After five years, it is now time to hand editorial responsibility to a new generation of scholars groomed in the spirit of democratic South Africa. This, therefore, is the last issue for me as the editor-in-chief. While I welcomed the privilege to lead the journal towards implementing a modified agenda, I now welcome the opportunity to move out of the way and pursue other tasks. I thank all those in the editorial group and the advisory board who accompanied and supported me during the last years. I am especially grateful to Maxi Schoeman, who felt I would be the right choice for this task. Special thanks go also to Wilma Martin, without her assistance none of the last eleven issues would have become a reality.

Application of optical and radar data for lineaments mapping in Kerdous inlier of the Anti Atlas belt, Morocco

2021 ◽  
Author(s):  
Amine Jellouli ◽  
Abderrazak El Harti ◽  
Zakaria Adiri ◽  
Mohcine Chakouri ◽  
Jaouad El Hachimi ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Remote Sensing Data ◽  
Radar Data ◽  
Ore Deposits ◽  
Landsat 8 ◽  
Landsat 8 Oli ◽  
Alos Palsar ◽  
Geological Map ◽  
Color Composite ◽  
Manual Extraction

<p>Lineament mapping is an important step for lithological and hydrothermal alterations mapping. It is considered as an efficient research task which can be a part of structural investigation and mineral ore deposits identification. The availability of optical as well as radar remote sensing data, such as Landsat 8 OLI, Terra ASTER and ALOS PALSAR data, allows lineaments mapping at regional and national scale. The accuracy of the obtained results depends strongly on the spatial and spectral resolution of the data. The aim of this study was to compare Landsat 8 OLI, Terra ASTER, and radar ALOS PALSAR satellite data for automatic and manual lineaments extraction. The module Line of PCI Geomatica software was applied on PC1 OLI, PC3 ASTER and HH and HV polarization images to automatically extract geological lineaments. However, the manual extraction was achieved using the RGB color composite of the directional filtered images N - S (0°), NE - SW (45°) and E - W (90°) of the OLI panchromatic band 8. The obtained lineaments from automatic and manual extraction were compared against the faults and photo-geological lineaments digitized from the existing geological map of the study area. The extracted lineaments from PC1 OLI and ALOS PALSAR polarizations images showed the best correlation with faults and photo-geological lineaments. The results indicate that the lineaments extracted from HH and HV polarizations of ALOS PALSAR radar data used in this study, with 1499 and 1507 extracted lineaments, were more efficient for structural lineament mapping, as well as the PC1 OLI image with 1057 lineaments.</p><p><strong>Keywords</strong> Remote Sensing . OLI. ALOS PALSAR . ASTER . Kerdous Inlier . Anti Atlas</p>

scholarly journals Geological Map of a Treasure Chest of Geodiversity: The Lavagnina Lakes Area (Alessandria, Italy)

Geosciences ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 229 ◽  
Author(s):  
Marco Scarsi ◽  
Laura Crispini ◽  
Cristina Malatesta ◽  
Chiara Spagnolo ◽  
Giovanni Capponi
Keyword(s):  
Gold Mineralization ◽  
Scientific Research ◽  
Oceanic Lithosphere ◽  
Western Alps ◽  
Geological Mapping ◽  
Natural Park ◽  
Research Activities ◽  
Geological Map ◽  
Nw Italy ◽  
Treasure Chest

The aim of this work is to present a new georeferenced geological map of an area in the Ligurian Western Alps (Lavagnina Lakes area) that includes both a unique geodiversity and great biodiversity, a peculiar geological heritage, and cultural features. The study area is located in the northern part of the Capanne di Marcarolo Regional Natural Park, occurring in the southern Piedmont Region (Alessandria, NW Italy) and close to the suburbs of Genoa. This area has been studied by multi-disciplinary scientific researchers who, so far, have focused their attention on the occurrence of alkaline springs and investigation of different endemic floral species. Moreover, in the past, the Lavagnina Lakes area has been exploited due to the presence of gold mineralization, and several mining records are still visible. We performed detailed geological mapping at a 1:10,000 scale, and collected data that were later integrated into a digital GIS map. The database associated with the map contains information that may be interesting from different points of view: (i) scientific research; (ii) outreach and dissemination activities; and (iii) geotourism (i.e., trail networks and panoramic viewpoints). The area represents a section of the Jurassic Piedmont Ligurian oceanic lithosphere, showing several geologic processes on different scales, such as the serpentinization process and intense and widespread carbonation of ultramafic rocks; the area is, moreover, characterized by fault systems showing paleoseismic structures. Beyond scientific research activities (i.e., geology, geoarchaeology, and mining archaeology), the area can also be promoted for geotourism, outreach and dissemination activities, field trips for schools, and gold panning activities. Hence, our new digital map and our 3D model could be a useful tool to illustrate the main characteristics of the area, leading a non-expert public to explore different geological features in a relatively “small” area. In this way, our map could help to improve geotourism, be used as a tool for educational activities, and, finally, could also help the Capanne di Marcarolo Regional Natural Park to be recognized as a geopark.

Sign in / Sign up

Export Citation Format

Share Document