3D Computer-Assisted Geological Mapping with FaultTrace: Results of the Richât Structure (Mauritania) and the Vineh Structure (Iran)

2021 ◽  
Author(s):  
Robert Faber ◽  
Gisela Domej
Keyword(s):  
Case Studies ◽  
Cross Sections ◽  
Geological Mapping ◽  
Computer Assisted ◽  
Data Generation ◽  
Fault Systems ◽  
The North ◽  
Bedding Planes ◽  
Mapping Process ◽  
The Rich

<p>To evaluate the functionality of FaultTrace – a tool for semi-automatic structural geological mapping of faults and bedding planes within the software WinGeol by TerraMath –, we demonstrate its detailed use in two different case studies: The Richât Structure in Mauritania is characterized by a volcanogenic anticline with associated fault systems and shows relatively planar fault structures within low-relief topography; the Vineh Structure in Iran consists of complexly faulted sequences of sedimentary and igneous layers in high mountainous terrain affected by the fault systems of the Purkan-Vardij Fault and the North Tehran Fault. The studies discuss which structural geological settings let expect a satisfying performance of FaultTrace, and what factors limit the achievement of meaningful results. </p><p>Used data is freely available and consists of digital elevation models (e.g., SRTM or ALOS Data) and satellite imagery (e.g., Sentinel-2 or Landsat ETM+ Imagery). Where available, additional data such as, for instance, borehole logs and geological cross-sections were displayed to support the mapping process. Results from the structural geological assessments of both case studies were finally compared to previously published studies in order to validate the performance of FaultTrace on the one hand, and to discuss differences on the other hand.</p><p>We show that FaultTrace aims to provide a virtual environment allowing for fast-track and optimized data generation for 3D geological models. It can be used for a first remote structural geological assessment without the requirement of being at the site. Therefore, it is well suited for inaccessible terrain – for instance, due to transportation, political restrictions, warfare, natural hazards, or lack of funding. Nevertheless, and to take full advantage of the software, users have to be aware of the limitations and strengths, which are discussed in this work based on two very different case studies.</p>

FABER, R., DOMEJ, G., 2020. Computer-Assisted Geological Mapping (CAGEM) in 3D with WinGeol by TerraMath: the Richât Structure in Mauritania.

2020 ◽  
Author(s):  
Robert Faber ◽  
Gisela Domej
Keyword(s):  
Image Data ◽  
Geological Structure ◽  
Geological Mapping ◽  
Vegetation Coverage ◽  
Computer Assisted ◽  
Mapping Tool ◽  
Bedding Planes ◽  
Elevation Data ◽  
The Rich ◽  
Geometric Elements

<p>Theoretically, analysis of digital elevation data and remote sensing images allows for convenient mapping of geological settings. Using computer tools, geometric plane elements can be joined with elevation and image data to map structures in 3D. <br>One disadvantage is that single geometric elements are processed consecutively, even if belonging to the same structure. Only in rare cases, it is possible to trace a geological structure in its entirety without gaps; moreover, various uncertainties during the mapping process (caused, e.g., by erosion or vegetation coverage) may let elements appear isolated or distorted. Therefore, creating an entirely consistent numerical model of a particular geological setting is highly time-consuming, usually cost-intensive, and – to some extent – error-prone.<br>We extended the existing 3D geological mapping tool FaultTrace (a module of TerraMath WinGeol) to allow for simultaneous processing of larger and more significant structural segments of faults and bedding planes. Geometric elements can influence each other now and the usage of optional time tables associated with the mapped structures helps to analyze more complex settings.  <br>The workflow is demonstrated using the example of the Richât Structure in the Sahara Desert of Mauritania.</p>

Analyses des contraintes par méthodes graphiques dans une zone de coulissage : exemple de la région de Matapédia, Gaspésie, Appalaches du Québec

1993 ◽  
Vol 30 (3) ◽  
pp. 591-602 ◽  
Author(s):  
Claude Trudel ◽  
Michel Malo
Keyword(s):  
Cross Sections ◽  
Shear Zones ◽  
Strike Slip ◽  
Geological Mapping ◽  
Fault System ◽  
Upper Ordovician ◽  
The North ◽  
Principal Compressive Stress ◽  
Ground Faults ◽  
Dextral Strike Slip

The north-northeast trending Sellarsville and Rafting Ground faults are southeasterly directed Acadian (Devonian) thrusts in the Québec Appalachians. They are located at the western end of the Grand Pabos fault system, a dextral strike-slip fault system that transects Upper Ordovician to Lower Devonian sedimentary rocks in the southern Gaspé Peninsula. The structural analysis of mesoscopic brittle and brittle–ductile shear zones by graphical methods was used to determine the stress field related to these two faults. The attitude of slip lines was calculated when the slickenside striations were not observed on the movement plane. Conjugate faults, Arthaud's method, and Angelier and Mechler's method were used to determine the paleostress. The maximum principal compressive stress σ1, always subhorizontal and striking west-northwest – east-southeast, is perpendicular to the Sellarsville and Rafting Ground faults and was probably the cause of the thrusting motion along the faults. North-northeast-trending regional folds and cleavage could also be related to this same stress. Geological mapping and structural cross sections confirm the southeasterly directed thrust motions, which are well integrated in the Grand Pabos fault system. Sellarsville and Rafting Ground faults with the Restigouche fault may represent a leading contractional imbricate fan in a dextral strike-slip system. [Journal Translation]

The New Swedish Cyprus Expedition 2010. Excavations at Dromolaxia Vizatzia/Hala Sultan Tekke. Preliminary results

2011 ◽  
Vol 4 ◽  
pp. 69-98 ◽  
Author(s):  
Peter M. Fischer ◽  
Patrik Klingborg ◽  
Fanny Kärfve ◽  
Fredrika Kärfve ◽  
C. Hagberg ◽  
...  
Keyword(s):  
Ground Penetrating Radar ◽  
Main Task ◽  
Phase 2 ◽  
The North ◽  
12Th Century ◽  
Area 6 ◽  
Recent Phase ◽  
The Rich ◽  
Ground Penetrating

Determination of the complete occupational sequence of the site, including investigation of pre-12th century levels which were thoroughly studied by P. Åström since the 1970s, is the main task of the planned project. During the course of the expedition (NSCE11) in spring 2010 a ground-penetrating radar survey (GPR) was carried out at Dromolaxia Vizatzia/Hala Sultan Tekke in Area 6, leading to the discovery of a large Late Cypriote complex. The compound is bordered to the north by a substantial wall, against which nine rooms (so far) could be exposed. Two occupational phases have been verified but there are indications of a third. The suggested functions of the various structures of the most recent phase are: living, working, storage and administration spaces. The rich find contexts point to the production of textiles and metal objects, and the locally produced pottery is generally of a high quality. There are also many imports, mainly from the Mycenaean sphere of culture. The locally produced vessels from Phase 2 include the “Creature krater” which is a masterpiece of a high artistic standard. Another piece of elevated artistry is the piece of a “Warrior vase”.

Modernism and Non-Translation

2019 ◽  
Keyword(s):  
Case Studies ◽  
James Joyce ◽  
Ezra Pound ◽  
Modernist Literature ◽  
Cultural Implications ◽  
The Rich ◽  
The Aesthetic ◽  
Reading Key ◽  
Modernist Fiction ◽  
Selection Of

Modernism and Non-Translation proposes a new way of reading key modernist texts, including the work of canonical figures such as T. S. Eliot, James Joyce, and Ezra Pound. The topic of this book is the incorporation of untranslated fragments from various languages within modernist writing. It explores non-translation in modernist fiction, poetry, and other forms, with a principally European focus. The intention is to begin to answer a question that demands collective expertise: what are the aesthetic and cultural implications of non-translation for modernist literature? How did non-translation shape the poetics, and cultural politics, of some of the most important writers of this period? Twelve essays by leading scholars of modernism explore American, British, and Irish texts, alongside major French and German writers, and the wider modernist recovery of Classical languages. They explore non-translation from the dual perspectives of both ‘insider’ and ‘outsider’, unsettling that false opposition, and articulating in the process their individuality of expression and experience. The range explored indicates something of the reach and vitality of the matter of translation—and specifically non-translation—across a selection of poetry, fiction, and non-fictional prose, while focusing on mainly canonical voices. Offering a series of case studies, the volume aims to encourage further exploration of connections across languages and among writers. Together, the collection seeks to provoke and extend debate on the aesthetic, cultural, political, and conceptual dimensions of non-translation as an important yet hitherto neglected facet of modernism, helping to redefine our understanding of that movement. It demonstrates the rich possibilities of reading modernism through instances of non-translation.

scholarly journals Structure of end moraines and dynamics of the recession phase of the Warta Stadial ice sheet, Kłodawa Upland, Central Poland

2020 ◽  
Vol 12 (1) ◽  
pp. 753-763
Author(s):  
Magdalena Anna Drążczyk
Keyword(s):  
Cross Sections ◽  
Ice Sheet ◽  
Geological Mapping ◽  
Dynamic State ◽  
Central Poland ◽  
The Creation ◽  
Key Sites ◽  
Marginal Zones

AbstractThe occurrence of end moraines reflects the dynamics of an ice sheet, and their inner structure is determined by processes taking place in marginal zones. In the southern part of the Kłodawa Upland of Central Poland, such moraines were formed, but opinions conflict as to their origin, including the influence of local transgression of the ice sheet, as well as its areal and frontal recession. The primary aim of this article is to analyse the inner structure of forms to define the dynamic state of the Warta Stadial ice sheet of the Odra Glaciation (Saalian). The conducted research includes fieldwork at four key sites, where lithofacial analysis was performed, as well as a geomorphological and geological mapping that included two cross-sections in greater detail. In exposures, the work focused on deformed structures of sediments. Description of key sites was extended by the creation and the analysis of general geological cross-sections. Considering the results of the research, the Kutno end moraines should not be classified as push moraines – they were revealed to be accumulative in character.

scholarly journals Epistemic values of quantity and variety of evidence in biological mechanism research

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Yin Chung Au
Keyword(s):  
Experimental Data ◽  
Causal Inference ◽  
Case Studies ◽  
Biological Mechanism ◽  
Data Generation ◽  
Extended Version ◽  
Epistemic Values ◽  
Difference Making ◽  
Mechanism Research ◽  
The Difference

AbstractThis paper proposes an extended version of the interventionist account for causal inference in the practical context of biological mechanism research. This paper studies the details of biological mechanism researchers’ practices of assessing the evidential legitimacy of experimental data, arguing why quantity and variety are two important criteria for this assessment. Because of the nature of biological mechanism research, the epistemic values of these two criteria result from the independence both between the causation of data generation and the causation in question and between different interventions, not techniques. The former independence ensures that the interventions in the causation in question are not affected by the causation that is responsible for data generation. The latter independence ensures the reliability of the final mechanisms not only in the empirical but also the formal aspects. This paper first explores how the researchers use quantity to check the effectiveness of interventions, where they at the same time determine the validity of the difference-making revealed by the results of interventions. Then, this paper draws a distinction between experimental interventions and experimental techniques, so that the reliability of mechanisms, as supported by the variety of evidence, can be safely ensured in the probabilistic sense. The latter process is where the researchers establish evidence of the mechanisms connecting the events of interest. By using case studies, this paper proposes to use ‘intervention’ as the fruitful connecting point of literature between evidence and mechanisms.

scholarly journals Chiming In: A Computer-Assisted Analysis of Popular Musicians’ Political Engagement on Twitter

2021 ◽  
Vol 7 (2) ◽  
pp. 205630512110190
Author(s):  
Josephine Lukito ◽  
Luis Loya ◽  
Carlos Dávalos ◽  
Jianing Li ◽  
Chau Tong ◽  
...  
Keyword(s):  
Case Studies ◽  
Hip Hop ◽  
Political Engagement ◽  
Future Research ◽  
Computer Assisted ◽  
Christian Music ◽  
Political Issues ◽  
Qualitative Case Studies ◽  
Systematic Examination ◽  
Assisted Analysis

While music as an artistic form is well studied, the individuals behind the art receive relatively less attention. In this article, we provide evidence of celebrity advocacy with a systematic examination of musicians’ political engagement on Twitter. This study estimates the extent to which musicians use Twitter for political purposes, with particular attention to whether such engagement varies across music genres. Through a computational-assisted analysis of 2,286,434 tweets, we group 881 musicians into three categories of political engagement on Twitter: not engaged (comprising the majority of artists), circumstantial engagement, and active political engagement. We examine the latter categories in detail with two qualitative case studies. The findings indicate that musicians from different genres have distinct patterns of political engagement. The Christian music genre shows the most engagement as a whole, especially in philanthropy. On the contrary, the most active accounts are rock and hip-hop artists, some of whom discuss political issues and call for mobilization. We conclude with suggestions for future research.

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