239 Result(s)
-
Chapter
Afrika
Zweifellos ist Afrika der mit Kohlenschätzen am geringsten bedachte Erdtheil; es darf entschieden als sehr kohlenarm bezeichnet werden. Wohl ist Afrika in seinen sonst zwar schon bekannten Theilen in geologisc...
-
Chapter
Arctische Gebiete
Das nördlichste bisher entdeckte Kohlenlager der Erde ist jenes, welches die „Discovery“ der englischen Nordpolexpedition 1875 in der nach ihr benannten und an der Westseite des Robeson-Canals im äussersten No...
-
Chapter
Europa
Urkundlich wird der Verbrauch von Steinkohlen in England erst im 13. Jahrhundert erwähnt. König Heinrich III. ertheilt 1233 den Bewohnern von Newcastle am Tyne die Freiheit, „Steine und Kohlen zu graben und di...
-
Chapter
Asien
Die Productionsziffern sind bereits in dem Abschnitte über das europäische Russland gegeben worden.
-
Chapter
Australien
Kohle und Eisen finden sich über das ganze Festland Australiens zerstreut, freilich in sehr verschiedener Ergiebigkeit und sehr verschiedenem Werthe. Dort, wo die Erde unerschöpfliche Vorräthe an edlen Metalle...
-
Chapter
Allgemeine Bemerkungen
Das Zeitalter des Stahls, dessen Herannahen seit der epochemachenden Erfindung Bessemer’s verkündigt wurde, dessen Vorboten bereits auf den letzten vier Weltausstellungen erschienen und dessen Morgen auf der W...
-
Chapter
Amerika
Die Vereinigten Staaten von Nord-Amerika, welche wir bisher vornehmhli als eine ergiebige Quelle auf dem Gebiete der technischen Erfindungen zu schätzen gewohnt waren, sind uns nunmehr in Folge der Centennial-...
-
Chapter and Conference Paper
Crandallite Formation in Archaeological Potteries Found in the Amazonian Dark Earth Soils
Archaeological dark earth soils (ADE) are common in the Amazonia and they contrast with the poor tropical soils, since they carry high contents of organic material and nutrients like phosphor, besides ceramic ...
-
Chapter and Conference Paper
REE Mobilization in Complex Hydrothermal–Metasomatic Systems: Fluid Chemistry Evidence of Albitite And Chlorite-Talc Mineralisations in Central Sardinia, Italy
Several Na-feldspar and talc-chlorite deposits occur in central Sardinia. The development of post-magmatic Na-metasomatism mainly involved the bulk of the local plutons to which economic occurrences of metasom...
-
Chapter and Conference Paper
Occurrences and Petrographical Variations among the Glauconite Deposits from Egypt
Glauconite deposits are widely distributed in the Western Desert of Egypt. In the Bahariya Oasis, Cenomanian glauconites (Bahariya Formation) underlay the middle Eocene iron ore of Naqb Qazzun Formation, while...
-
Chapter and Conference Paper
Comparing the Mineralogical Characterisation of Iron Ore by Using Qemscan and Pta
Automatic scanning systems can be used to detect value minerals in polished sections. These instruments have now reached a maturity level for the actual analysis, but since they generate a lot of information, ...
-
Chapter and Conference Paper
Development of a Textural Acid Rock Drainage Index for Classifying Acid Formation
Textural analyses are largely absent from predictive ARD (acid rock drainage) assessments despite the direct control of texture on acid formation. The objective of this study was to develop a simple method for...
-
Chapter and Conference Paper
Compare the Microstructure and Microenvironment of Dry and Wet Organic Montmorillonites
Organic montmorillonite are extensively used in a wide range of applications in pollution control and remediation purposes as a result of their high cation exchange capacity, swelling capacity, high surface ar...
-
Chapter and Conference Paper
Building Façades of Oporto City Covered with Glazed Tiles. Guidelines of Haracterisation for Preservation
Glazed tiles as a building cladding are associated with the return of Portuguese emigrants from Brazil. The first façades using this type of cladding emerged between the late eighteenth century and early ninet...
-
Chapter and Conference Paper
Three-Dimensional Evaluation of Magnetite–Hematite Transformation Via EBSD Technique
Previous research has shown that the orientation of the lattice of hematite, originated during the transformation of magnetite to an oxidized phase, is controlled by the original crystal of magnetite. So, to c...
-
Chapter and Conference Paper
Application of Rapid X-Ray Diffraction (Xrd) and Cluster Analysis to Grade Control of Iron Ores
Traditionally, grade control of iron ores has relied on elemental analysis of sampled materials such as blast cone drill cuttings. This analysis provides a standard elemental suite (Fe, SiO2, Al2O3, P, Mn, S, MgO...
-
Chapter and Conference Paper
Rare-Earth Element and Thorium Potential of Heavy Mineral Deposits Along the West Coast of South Africa With Special Reference to the Namakwa Sands Deposit
The west coast of South Africa is well known for its Cenozoic unconsolidated marine and aeolian placer deposits. The gem-quality diamond deposits have been effectively depleted; however, the significant heavy ...
-
Chapter and Conference Paper
The Discovery of a New Metallogenic Province in Sardinia (Italy): Au–Ag Mineralisations of Tertiary Age
The Oligo–Miocene volcanic cycle was accompanied by intense hydrothermal phenomena, which produced extensive alteration zones and ore deposition, mostly of precious metals. The low price of gold before the sev...
-
Chapter and Conference Paper
The Roman Bridge of Sant’antioco (Sardinia, Italy): The Analysis of Masonries and Characterization of Materials
This article is part of an ongoing study dealing with the analysis of the bridge of the ancient city of Sant’Antioco. It is an architectural specialty dating back most probably to Roman times followed by many ...
-
Chapter and Conference Paper
Co2 Sequestration During Interactions Between Fluid and Mafic to Intermediate Intrusive Rocks on Vannøya Island, West Troms Basement Complex, North Norway
The island of Vannøya, which is part of the West Troms Basement Complex, North Norway, is dominated by 2885 Ma tonalitic gneisses. The gneisses were intruded by a mafic dyke swarm about 2400 Ma ago. Unconforma...
