für 12.90€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Justus Ludwig Adolf Roth (1818-1892) war ein deutscher Geologe. Nachdruck des Originals von 1866. ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· 10361141836
····· lezzter Preis 19.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Mit zahlreichen Abbildungen und zwei Tafeln unterlegtes Taschenbuch zum Bestimmen von Mineralen. Nachdruck des Originals von 1928. ····· ····· ····· ····· ····· ····· ····· ····· 10361150747
····· lezzter Preis 20.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray In dieser außergewöhnlichen Gesamtdarstellung des Mineralreiches wird eine Fülle von Prozessen und lebendigen Wechselwirkungen aufgezeigt, die weit über die gängige Vorstellung der Gesteinswelt hinausführt. Die Mineralien erweisen sich hier als Stationen im Kreislauf der irdischen Stoffe und Elemente. Der Autor öffnet den Blick auf eine Welt von ungeheurer Faszination. Im Eis ist das Wasser zum Mineral geworden: Jahrhunderte in alpinen Gletschern, Jahrtausende im Dauerfrostboden Sibiriens und Nordamerikas und mehr als hunderttausend Jahre in der Antarktis. In tektonisch angelegten Spalten steigt die rotglühende Schmelze aus der Tiefe der Erde bis an die Oberfläche. Die feurige Natur des Schwefels manifestiert sich im Verglühen des Pyrit. Durch seine Wechselbeziehung zur Luft hat das Mineralreich an der Entwicklung der irdischen Atmosphäre mitgewirkt. Nahezu die Hälfte von den durch Lebewesen in den Gewässern abgelagerten Kalk- und Dolomitgesteinen ist ein mineralgewordener Anteil der Luft. Bei den Lebewesen wiederum wirken vielfältige mineralische Formprinzipien- Schneckenhäuser, Seeigel, Skelettbildungen- mit Gestaltungen von höchster Symmetrie und überwältigender Mannigfaltigkeit. ····· 10361198970
····· lezzter Preis 25.00€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Georg Agricola gilt als Begründer der wissenschaftlichen Behandlung der Mineralogie und Bergbaukunde und zählt zu den wichtigsten Persönlichkeiten der Technik-Geschichte.Sein großes Vermächtnis für den Bergbau und die Wissenschaftsgeschichte ist das 1556 erschienene Werk `De re metallica libri XII - Zwölf Bücher vom Berg- und Hüttenwesen`, worin er u.a. die Mineralien klassifiziert und bedeutende Ansätze zur Lagerstättenkunde formuliert. Darin wurzelt die geologische Wissenschaft späterer Jahrhunderte. Zudem begründen seine umfangreichen technologischen Ausführungen die frühen Ingenieurwissenschaften in der europäischen Renaissance. ····· 10361158405
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dada la formación de micelas observadas por auto-asociación de asfaltenos en solventes aromáticos, y la teoría de separación de fases en soluciones micelares, se reportan las concentraciones micelares críticas calculadas de asfalteno en tolueno, y se comparan con aquellas medidas por tensión superficial. El modelo desarrollado depende de C y K que corresponden a la temperatura crítica y al crecimiento de la micela, respectivamente. Se obtiene una expresión para el número de monómeros en la micela asfalteno-tolueno. Los diagramas de fase calculados para fracciones del petróleo muestran concordancia con aquellos medidos experimentalmente. Los números de monómeros de asfalteno agregados en la micela presentan tendencias similares a aquellos reportados para otros sistemas de micelas pequeñas, y también son del mismo orden de magnitud de aquellos reportados experimentalmente para micelas de asfalteno en tolueno. El acoplamiento entre micelización y separación de fase lleva a una coexistencia tricrítica de una fase monomérica y una fase micelar de asfaltenos. Estos desarrollos son útiles en estudios de miscibilidad de hidrocarburos pesados en la industria del petróleo. ····· 1036121966
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Fine coal dewatering continues to be a priority research area with a significant emphasis being placed on enhancing the dewatering performances from the existing technologies as well as developing new dewatering technologies. The present research relates to the performance improvement of an existing dewatering technology known as screen bowl centrifuge. The ability to produce low product moisture content and the relatively low dewatering cost has resulted in the wide-spread use of screen bowl centrifuge in the coal preparation plants. The main goal of the present investigation presented in the book was to investigate on how to improve upon the clean coal recovery performance of a screen bowl centrifuge while maintaining low product moisture content. In addition investigation was also done to understand the ultra-fine size classification performance of a screen bowl centrifuge. ····· 10361134132
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A two-dimensional shallow resistivity survey of the groundwater potential of Ahmadu Bello University, Kongo Campus, Zaria Kaduna State, Nigeria using electrical imaging technique was carried out. Six image lines were measured at different strategic locations of the study area based on the fractured map of the area and Borehole log data information obtained from the area. Results from the interpretation of the data collected suggest 2-4 layers in the area studied.The resistivity value for the first layer (Topsoil) varies from 10 to 400 ohmm with thickness ranging from 1-14m. The second layer (Weathered Basement) has resistivity values between 120 and 500 ohm-m and thickness ranging from 5-11m. The third layer (Fractured basement) has resistivity values ranging from 500-1000 ohm-m and thickness between 3 and 6m. The fourth layer is the Fresh Basement (Bedrock) has resistivity values greater than 1000 ohm-m and infinite thickness.The southwest (SW) of the study area does represent a promising Aquifer with reasonable thickness of Weathered Basement and Fractured Zone. Also, the area seems to be a zone of high hydraulic conductivity because of its low resistivity values. ····· 10361114556
für 44.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray This work presents mathematical models for pressure and saturation distributions of oil and water flow through semi-infinite porous media. The mathematical models were developed from the popular Darcy s equation and the continuity equation. The mathematical model, which contains simultaneously saturation and pressure gradients, was decoupled to have a pure pressure and saturation differential equations. The Crank-Nicolson Finite Difference Method was used to provide solution to the partial differential equations. System of linear equations resulted from the discretized partial differential equations were solved for saturation and pressure distributions using the Modified Gaussian Elimination Method algorithm, which was implemented in Microsoft Excel Visual Basic for Application. The solution was tested using hypothetical oil/water well production data. The solution scheme and computer language adopted in this work are easy to apply and use as opposed to the sophisticated and expensive computer software used by most researchers in the area. ····· 10361147346
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Subvolcanically emplaced granitic, miarolitic pegmatites associated with the White Mountain Igneous Province (WMIP), New Hampshire, were sampled and analyzed using modern analytical techniques including X-ray fluorescence, electron microprobe, scanning electron microscopy, and direct-coupled plasma spectrophotometry. Analytical results suggest that all the sampled miarolitic pegmatites from this study are petrogenetically related to the same intrusive suite, the WMIP. Based on the geochemical data, all the samples formed in an anorogenic tectonic setting and are rift-related. They are classified as NYF-type and plot in the within plate granite field on tectonic discrimination diagrams. The majority of the samples are peraluminous, A1-type granites. The trace element abundances on the spider diagram and chondrite-normalized diagram, which include a pronounced negative Eu anomaly and REE enrichments, are consistent with these miarolitic pegmatites resulting from a strongly fractionated granitic parental melts, but less fractionated than the classic NYF-systems such as South Platte (Simmons et al. 1987) and the Wausau Syenite Complex (Meyers et al. 1984). ····· 10361100234
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The Equation of state (EOS) of condensed matter is very important in many fields of basic and applied sciences [1-3]. A relation between pressure (P) and volume (V) which is capable of predicting P-V behaviour of a substance at constant temperature is known as isothermal EOS. The properties of solids under varying conditions of temperature and pressure have attracted the attention of theoretical and experimental workers because of their need in different branches of science [4-8]. In order to understand the behaviour of solids from atmospheric pressure (as P=0) upto their structural transition pressure and from room temperature upto melting temperature, it is desirable to have a precise knowledge of temperature and pressure dependence of several properties such as pressure dependence of unit cell volume ratio (V/V0), Grüneisen parameter ( ), Anderson- Grüneisen parameter ( T), Debye characteristic temperature ( D)etc. ····· 10361113564
für 53.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray A comprehensive study was conducted to determine thorium, uranium and potassium elemental concentration in Kajuru, Kaduna State Nigeria using model Disa-300 portable gamma-ray spectrometer. The data were collected at 300 stations from all over the bedrock surface of the site based on the different lithological units of the study area. Element concentrations determined for uranium (eU) is 62 ppm bounded by 63 ppm contour line were considered anomalous and the threshold value of eU/eTh derived from the background corrected data for the site estimated to be 0.76 ppm. Therefore, all areas bounded by the 0.80 ppm contour line were considered anomalous. The high surface eU concentrations indicate uranium enrichment in this area. The high eU/eTh values and the surface K concentrations were low indicates preferential enrichment of uranium and thorium to potassium in this area. ····· 10361114105
····· lezzter Preis 54.90€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dieses im Original 1922 erschienene Buch beschreibt die Grundlagen der Petroleumgeologie. ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· ····· 10361150766
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray El proyecto está orientado al estudio de la génesis del importante yacimiento de níquel ubicado en la localidad de Loma de Hierro en el estado Aragua, Venezuela. Éste yacimiento había tenido previos estudios relacionados con su génesis de formación y las posibles asociaciones minerales que en él se encuentran, sin embargo, muchos de estos estudios no contaron con un análisis más detallado de las partes del sistemas que dio origen a tal acumulación anómala de níquel es esa región. El presente estudio transformado en un proyecto de grado, le permite indagar y conocer acerca del elemento níquel, de sus diferentes acumulaciones en la superficie de la tierra, en particular la de Loma de Hierro, y demuestra claramente mediante el uso de herramientas de análisis químico y petrográfico, presentadas mediante datos numéricos e imágenes, la génesis del yacimiento, el mineral mena explotable y una serie de conclusiones a la cual se llegó. ····· 10361117415
für 61.20€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Micromorphological and mineralogical properties can provide insights and aid interpretation of soil classification.The main objective of the study was to increase the understanding of soil classification through evaluation of micromorphological and mineralogical properties of soils. With a view to determining if differences in properties could be used. Based on the geological map sheet used to identify different parent materials, eight (8) profiles were dung and described and five distinct soil types were identified and mapped as soil units A, B, C, D and E. Results obtained revealed that micromorphology of surface horizon in basaltic soils shows a porous (compound packing) and crumb microstructure. The groundmass consists mainly of fine iron hydroxides in crystallitic micromass. Compound coatings of radial distributed and isotropic ( amorphous ) iron hydroxides line the pores. Granitic surface horizon was mainly crumb with vughs and channels microstructure. In addition high clay content which complexes humus and thus reduces its ability to move downward in the profiles. The analysis should help shed some light on microbrafics and the work would be useful to Micropedologists. ····· 10361115903
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray Dr. Abdoullah Namdar has obtained PhD degree in 2009 form University of Mysore. To his credit he has 27 research papers appeared in reputed international journals. He has been referee for several research papers of reputed international journal, lecturer and associated research in different universities in India. Prof.G.S.Gopalakrishna is obtained Ph.D degree in 1994. He has successfully completed 3 major research projects awarded by DST, Government of India and Karnataka state government. To his credit he has 75 research papers appeared in reputed international and national journals. 8 candidates have obtained their doctoral degree so far. ····· 10361100691
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray It appears from the complete survey of literature, most of the equation of state are suitable for expressing the isothermal pressure-volume relationship. The thermodynamic state of a system is usually defined by pressure P, temperature T and specific volume V, linked by the equation of state (EOS). Various possible equation of states for solids (EOS) at high pressure and high temperature have been considered. In order to build compositional Earth models, it is indispensable to have an EOS for the regions of the interior of Earth as well as for the candidate minerals. The aim of the present work is to evaluate various useful and interesting properties i.e. Debye temperature, maximum Debye frequency, elastic anisotropy, shearing wave velocity, compressional wave velocity, mean wave velocity, shear modulus, Grüneisen parameter and Anderson- Grüneisen parameter. The present work is divided into five Chapters including introductory part of the thesis. Other chapters cover the evaluation of accustic properties and variation of pressure with different compressions. Agreement of result with experimental values are appreciable. ····· 10361102771
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En el Golfo de Cádiz se produce la emisión de fluidos fríos ricos en metano debido a su estratégica configuración geológica. Como consecuencia de estas emisiones se han formado espectaculares concentraciones de carbonatos autigénicos en forma de chimenea producto de la actividad microbiana por la oxidación del metano en ausencia de oxígeno y la reducción de sulfatos. Algunas señales de dicha actividad han quedado reflejadas en el interior de las chimeneas, siendo los minerales de hierro con morfología framboidal la más significativa. En este trabajo se han establecido las relaciones entre chimeneas, emisiones de metano y actividad de determinados microorganismos quimiosintéticos. Además, se han inferido las condiciones físico-químicas de formación de las chimeneas y sus variaciones a partir del estudio de agrupaciones framboidales: desde condiciones anóxicas y pH altos que favorecen la precipitación de carbonatos hasta condiciones oxidantes y pH bajos cuando las chimeneas han estado en contacto con el agua marina. Este estudio permitirá seguir reinterpretando el registro geológico y aumentando la importancia de los carbonatos derivados del metano en el mismo. ····· 10361136497
für 71.10€ kaufen ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray The book is representing a pioneer work in the field of Economic Geology/Ore Geology of Kurdistan, Northeast Iraq. The studied area was politically unstable until 1991, hence the geological work was limited and not in detail. As Mawat Ophiolite Complex is a part of this area, therefore studies related to this important complex was very limited. This study focused on petrology and mineralogy of rock types especially the ultramafic rocks namely chromitite rocks. The chromitite rocks is podiform in shape envelops by dunite and harzburgite rocks. Geochemical and mineralogical studies revealed economical interest for these rocks which the Cr2O3 wt % up to 45 %. Due to its high grade the geophysical study should be carried out for determining the reserve of the ore type. ····· 10361134360
····· lezzter Preis 71.10€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray None of the clay minerals was found to be dominating in either silt or clay fractions. Both the fractions showed the presence of mixture of minerals namely mica, smectite, kaolinite and vermiculite. The presence of smectite and vermiculite amidst ubiquitous presence of mica indicates that mica might have weathered to give rise to smectite and vermiculite. In view of incipient development of soils in the Aravali sediments and also the similar kind of minerals throughout the profiles was suggested that the minerals present were not formed during the post deposition period of the soil formation. They appear to be inherited from the parent materials. The transformation of mica might have occurred at the source area of alluvium or during their transportation by water. Despite the soils were loamy sand or sandy loams textured but due to their enrichment in mica, smectite and vermiculite, they are beneficial in retaining moisture and nutrients during crop cultivation ····· 1036125513
····· lezzter Preis 88.20€ ···· Rheinberg-Buch.de - Bücher, eBooks, DVD & Blu-ray En este documento se plantean básicamente tres objetivos: Caracterización del sector de la minería en el ámbito de la mediana empresa presentar los fundamentos que pueden servir para evaluar inicialmente el desarrollo de una actividad minera desde una perspectiva socioeconómica financiera y aportar una metodología para la evaluación económico financiera de proyectos mineros. Este documento presenta como aportación propia la aplicación del modelo de estructura de proyecto MPDM que amplia la capacidad de los analistas mineros para investigar la política de operaciones en un ejercicio de evaluación. En este modelo, un proyecto minero es modelizado como un portfolio de activos reales en el cual las zonas del depósito de mineral, delimitados en función de las calidades, localización y las dimensiones, asumen el papel de componentes del portfolio. ····· 1036124186
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