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Автор(ы):Fraser A.J., Gawthorpe R.L.
Редактор(ы):Fleet A.J.
Издание:The Geological Society of London, London, 2003 г., 99 стр.
Язык(и)Английский
An Atlas of Carboniferous Basin Evolution in Northern England / Атлас эволюции каменноугольных бассейнов в Северной Англии

Why an atlas of the Carboniferous in northern England? There can hardly be a more researched system in the whole of the British Isles, given its widespread distribution at outcrop and annual appearance in numerous PhD theses (including our own). But perhaps all we really know about the Carboniferous is no more than skimming the surface. In this atlas, using modern multifold seismic and borehole data collected by the oil industry in its search for petroleum accumulations, we can start to look beyond the surface exposures and gain some new insights into the structure and stratigraphy of the subsurface (and surface) Carboniferous. The main elements of this atlas are: (i) a series of regional seismic lines crossing all the basinal areas in northern England illustrating the Carboniferous in section, and (ii) a set of palaeofacies maps describing the evolution of the system in map view.

Выпуск 97
Издание:Economic geology, 2002 г., 6 стр.
Язык(и)Английский
An evaluation of fluid inclusion microthermometric data for orpiment-realgar-calcite-barite-gold mineralization at the betze and carlin mines, Nevada

Carlin-type deposits contain gold in association with main-stage quartz-pyrite-kaolinite mineralization and late-stage orpiment-realgar-calcite-barite mineralization. Fluid characteristics for main-stage mineralization are well documented by fluid inclusion and stable isotope studies on quartz. In contrast, fluid characteristics for late-stage mineralization are not well constrained because of large ranges in fluid inclusion microthermo-metric data. These ranges could represent real variations in fluids or be a result of the reequilibration of fluid inclusions.

Microthermometric analyses were conducted on fluid inclusions in samples of barite, calcite, realgar, and or-piment from the Betze and Carlin mines, Nevada. Petrographic studies of individual crystals and cleaved sections reveal that fluid inclusions in realgar and barite have negative crystal shapes, in contrast to elongate and rounded inclusions in orpiment and calcite. Point-count data document that one-phase liquid inclusions (type 1) are the dominant type in barite and realgar, relative to two-phase, vapor-poor inclusions (type 2) in calcite and orpiment. Type 2 inclusions in realgar and barite commonly reequilibrate (e.g., stretch) during analysis and exhibit ranges in homogenization temperatures (Th) of 100º to 250ºC and 110º to 300ºC, respectively. In contrast, type 2 inclusions in orpiment and calcite have Th of 108º to 182ºC, which could be repeated to within 1ºC. Based on these results, fluid inclusions in barite and realgar are most susceptible to reequilibration, with Th of ~100º to 110ºC most representative. Fluid salinities for orpiment and calcite are 1.7 to 5.4 wt percent NaCl equiv, relative to 1.1 to 2.9 wt percent NaCl equiv for barite and realgar. The lower Th and salinity for fluid inclusions in barite and realgar suggest fluid cooling and dilution, following the deposition of paragenetically earlier orpiment and calcite.

Издание 2
Автор(ы):Reynolds J.M.
Издание:Wiley Blackwell, 2011 г., 711 стр., ISBN: 978-0-471-485360
Язык(и)Английский
An introduction to applied and environmental geophysics / Введение в прикладную и экологическую геофизику

In the broadest sense, the science of geophysics is the application of physics to investigations of the Earth,Moon and planets.The subject is thus related to astronomy. Normally, however, the definition of ‘geophysics’ is used in a more restricted way, being applied solely to theEarth. Even then, the termincludes such subjects asmeteorology and ionospheric physics, and other aspects of atmospheric sciences.

Автор(ы):Isaaks E.H., Srivastava R.M.
Издание:Oxford university press, Oxford, 1989 г., 577 стр.
Язык(и)Английский
An introduction to applied geostatistics

This began as an attempt to write the book that we wish we had read when we were trying to learn geostatistics, a task that turned out to be much more difficult than we originally envisaged. To the many people who provided encouragement, support, and advice throughout the writing of this book, we are very grateful.

We owe a lot to Andre Journel, without whom this book would never have been written. In addition to providing the support necessary for this project, he has been an insightful technical reviewer and an energetic cheerleader.

Автор(ы):Winter J.D.
Издание:Prentice-Hall Inc, 2001 г., 795 стр., ISBN: 0-13-21*03142-0
Язык(и)Английский
An introduction to igneous and metamorphic petrology / Введение в петрологию магматических и метаморфических пород

This text is designed for use in advanced undergraduate or early graduate courses in igneous and metamorphic petrology. The book is extensive enough to be used in separate igneous and metamorphic courses, but I use it for a one-semester combined course by selecting from the available chapters. The nature of geological investi-gations has largely shaped the approach that I follow.

Автор(ы):Bruce W.D.Yardley
Издание:Longman, 1990 г., 248 стр.
Язык(и)Английский
An introduction to metamorphic petrology / Введение в петрологию метаморфических горных пород

Metamorph;c processes have been taking place on a massive scale throughout the Earth's history, and have affected the bulk of the rocks now present in the crust. Despite this, they are not as well understood as sedimentary or volcanic processes, because metamorphism can scarcely ever be observed directly, and the study of metamorphic rocks is instead based on observation, inference and logic, founded in relatively simplistic experimental studies and the basic principles of chemistry and physics

Издание 3
Автор(ы):Deer W.A., Howie R.A., Zussman J.
Издание:British Library Cataloguing in Publication Data, 2013 г., 505 стр., ISBN: 978-0903056-33-5
Язык(и)Английский
An introduction to the rock-forming minerals / Знакомство с породообразующими минералами

The members of the olivine group crystallize with orthorhombic symmetry, the structures consisting of independent SiO4 tetrahedra linked by divalent cations in six-fold coordination. In the (Mg,Fe)-olivines there is complete solid solution between Mg2SiO4 (forsterite) and Fe2SiO4 (fayalite); similarly the (Fe,Mn)-olivines form a continuous series. Olivine is a major constituent of ultrabasic plutonic rocks and olivines of metamorphic origin occur principally in rocks of ultramafic composition, in impure carbonates and in iron-rich sediments.

Издание:Springer, 2015 г., 293 стр., ISBN: 2193-1577
Язык(и)Английский
Analysis and control of oilwell drilling vibrations. A time-delay systems approach / Анализ и контроль вибраций при бурении скважин. Анализ систем смещения времени ("время запаздывания")

Vibrations in mechanical systems are oscillations occurring without being intentionally provoked. They often have detrimental effects on the system performance and may cause premature wear of the system components, underperforming processes, and could even involve security problems, such is the case in aircraft wings; which in the worst case scenario, excessive vibration causes the aircraft to crash.

In oilwell drillstring systems, vibrations constitute an important source of economic losses; drill bit wear, pipes disconnection, borehole disruption and prolonged drilling time, are only some examples of consequences associated with drilling vibrations.<...>

Автор(ы):Greg Corbett
Издание:2009 г., 13 стр.
Язык(и)Английский
Anatomy of porphyry-related Au-Cu-Ag-Mo mineralised systems: Some exploration implications

Analyses of exploration and mining case studies as well as magmatic arc geothermal systems have facilitated an understanding of the implications to explorationists of the anatomy of porphyry related Au-Cu-Mo-Ag mineralising systems. Deeply eroded magmatic source rocks tend to host sub economic mineralisation, which may become focused in the highly prospective in overlying apophyses to spine-like polyphasal intrusions. Buried targets may be identified by analyses of zoned alteration and mineralisation developed by complex overprinting relationships. Mineralised fluids may exit from the magmatic source migrating to higher crustal levels to form epithermal deposits. High sulphidation epithermal Au + Cu + Ag deposits display characteristic alteration and mineralisation zonation which aids target generation and in some instances evolve to host marginal and overprinting lower sulphidation ores which display improved metallurgy and metal grades. Low sulphidation epithermal Au-Ag deposits are categorised as a number of styles, linked on an overall anatomy, which display considerable variation in metal grade, size, form and metallurgy, typically governed by setting and crustal level of formation, as well as controls to vein formation such as: host rock competency, structure, and mechanism of Au deposition. All these controls and zonation pattern vectors provide valuable tools to explorationists in the search for hidden ores.

Источник:Интернет
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